DE102012025283A1 - Piston useful for an internal combustion engine comprises a piston head comprising a piston base and a peripheral piston junk and a piston shaft - Google Patents
Piston useful for an internal combustion engine comprises a piston head comprising a piston base and a peripheral piston junk and a piston shaft Download PDFInfo
- Publication number
- DE102012025283A1 DE102012025283A1 DE201210025283 DE102012025283A DE102012025283A1 DE 102012025283 A1 DE102012025283 A1 DE 102012025283A1 DE 201210025283 DE201210025283 DE 201210025283 DE 102012025283 A DE102012025283 A DE 102012025283A DE 102012025283 A1 DE102012025283 A1 DE 102012025283A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- coating
- pore structure
- closed
- coated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 title abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 29
- 239000011148 porous material Substances 0.000 claims abstract description 22
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 14
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 10
- 239000011734 sodium Substances 0.000 claims abstract description 10
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 10
- 235000019351 sodium silicates Nutrition 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 239000004604 Blowing Agent Substances 0.000 claims abstract description 8
- 239000006260 foam Substances 0.000 claims abstract description 8
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 15
- 239000012790 adhesive layer Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 229910052582 BN Inorganic materials 0.000 claims description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- -1 zirconium silicates Chemical class 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- 239000010953 base metal Substances 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 235000012241 calcium silicate Nutrition 0.000 claims description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000391 magnesium silicate Substances 0.000 claims description 2
- 235000012243 magnesium silicates Nutrition 0.000 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 150000004767 nitrides Chemical class 0.000 claims description 2
- 229910052615 phyllosilicate Inorganic materials 0.000 claims description 2
- 150000004760 silicates Chemical class 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 claims 1
- 230000001939 inductive effect Effects 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000010285 flame spraying Methods 0.000 description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- 239000003380 propellant Substances 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 239000012720 thermal barrier coating Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 229910052580 B4C Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241000282994 Cervidae Species 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- LRTTZMZPZHBOPO-UHFFFAOYSA-N [B].[B].[Hf] Chemical compound [B].[B].[Hf] LRTTZMZPZHBOPO-UHFFFAOYSA-N 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- LKTZODAHLMBGLG-UHFFFAOYSA-N alumanylidynesilicon;$l^{2}-alumanylidenesilylidenealuminum Chemical compound [Si]#[Al].[Si]#[Al].[Al]=[Si]=[Al] LKTZODAHLMBGLG-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 229910052627 muscovite Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/10—Pistons having surface coverings
- F02F3/12—Pistons having surface coverings on piston heads
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/08—Ceramics; Oxides
- F05C2203/0804—Non-oxide ceramics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/04—Thermal properties
- F05C2251/048—Heat transfer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/14—Foam
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen Kolben für einen Verbrennungsmotor mit einem Kolbenkopf und einem Kolbenschaft, wobei der Kolbenkopf einen Kolbenboden sowie einen umlaufenden Feuersteg aufweist, wobei der Kolben mit einer wärmedämmenden Beschichtung versehen ist. Die vorliegende Erfindung betrifft ferner ein Verfahren zur Herstellung eines derartigen Kolbens.The present invention relates to a piston for an internal combustion engine with a piston head and a piston skirt, wherein the piston head has a piston crown and a peripheral land, wherein the piston is provided with a heat-insulating coating. The present invention further relates to a method of manufacturing such a piston.
Es ist erwünscht, Kolben für moderne Verbrennungsmotoren insbesondere im Bereich des Kolbenbodens mit einer wirksamen Wärmedämmung auszurüsten, um bei den hohen thermischen Belastungen, wie sie für moderne Verbrennungsmotoren typisch sind, eine Überhitzung zu vermeiden.It is desirable to provide pistons for modern internal combustion engines, in particular in the region of the piston crown, with effective thermal insulation in order to avoid overheating in the case of the high thermal loads typical of modern internal combustion engines.
Aus der
Die
Derartige Beschichtungen werden in der Regel mittels Flammspritzverfahren oder PVD-Verfahren aufgetragen.Such coatings are usually applied by means of flame spraying or PVD process.
Die Aufgabe der vorliegenden Erfindung besteht darin, einen gattungsgemäßen Kolben sowie ein Verfahren zu seiner Herstellung so weiterzuentwickeln, dass mit möglichst einfachen Mitteln eine wirksame Wärmedämmschicht erhalten wird.The object of the present invention is to develop a generic piston and a method for its production so that with the simplest possible means an effective thermal barrier coating is obtained.
Die Lösung besteht darin, dass die wärmedämmende Beschichtung als Schaum mit geschlossenporiger Zellenstruktur ausgebildet ist, der mindestens einen plättchenförmigen keramischen Werkstoff sowie mindestens ein Bindemittel auf der Basis von Natrium- und/oder Kaliumsilikaten aufweist.The solution is that the heat-insulating coating is formed as a foam with a closed-cell structure having at least one platelet-shaped ceramic material and at least one binder based on sodium and / or potassium silicates.
Das erfindungsgemäße Verfahren zeichnet sich durch die folgenden Verfahrensschritte aus: (a) Reinigen des zu beschichtenden Oberflächenbereichs eines zu beschichtenden Kolbens; (b) Bereitstellen einer Suspension aus mindestens einem plättchenförmigen keramischen Werkstoff sowie mindestens einem Bindemittel auf der Basis von wässrigen Natrium- und/oder Kaliumsilikaten und mindestens einem Treibmittel; (c) Auftragen der Suspension auf den zu beschichtenden Oberflächenbereich unter Induzierung der Bildung einer geschlossenzelligen Porenstruktur; (d) Aushärten der Beschichtung nach Abschluss der Bildung einer geschlossenzelligen Porenstruktur.The method according to the invention is characterized by the following method steps: (a) cleaning the surface area of a piston to be coated, to be coated; (B) providing a suspension of at least one platelet-shaped ceramic material and at least one binder based on aqueous sodium and / or potassium silicates and at least one blowing agent; (c) applying the suspension to the surface area to be coated to induce the formation of a closed cell pore structure; (d) curing the coating after completion of the formation of a closed-cell pore structure.
Die erfindungsgemäß als Bindemittel eingesetzten Natrium- und/oder Kaliumsilikate sind auch unter dem Begriff „Wasserglas” bekannt.The sodium and / or potassium silicates used according to the invention as binders are also known by the term "water glass".
Es hat sich überraschenderweise herausgestellt, dass plättchenförmige keramische Werkstoffe die Entstehung von Schäumen mit geschlossenzelliger Porenstruktur bei einem Einsatz von Treibmitteln zur Herstellung dieser Schäume unterstützen. Auf diese Weise ist es möglich, Schäume mit geschlossenzelliger Porenstruktur auf besonders einfache Weise herzustellen. Insbesondere kann auf die Applikation zusätzlicher Deckschichten verzichtet werden. Schäume mit geschlossenzelliger Porenstruktur bilden besonders wirksame Wärmedämmschichten.It has surprisingly been found that platelet-shaped ceramic materials support the formation of foams with a closed-cell pore structure when blowing agents are used for producing these foams. In this way, it is possible to produce foams with a closed-cell pore structure in a particularly simple manner. In particular, can be dispensed with the application of additional layers. Foams with a closed-cell pore structure form particularly effective thermal barrier coatings.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.Advantageous developments emerge from the subclaims.
Die erfindungsgemäß vorgesehene Beschichtung weist vorzugsweise eine Porosität zwischen 30 Vol.-% und 50 Vol.-% auf. Dieser Wert stellt einen guten Kompromiss zwischen der wärmedämmenden Wirkung der geschlossenzelligen Porenstruktur und der im Motorbetrieb erforderlichen Druckfestigkeit der Beschichtung dar.The coating provided according to the invention preferably has a porosity between 30% by volume and 50% by volume. This value represents a good compromise between the heat-insulating effect of the closed-cell pore structure and the compressive strength of the coating required in motor operation.
Die erfindungsgemäße Beschichtung weist bevorzugt eine Druckfestigkeit von mindestens 20 N/mm2 auf, um den mechanischen Belastungen im Motorbetrieb standzuhalten.The coating according to the invention preferably has a compressive strength of at least 20 N / mm 2 in order to withstand the mechanical loads during engine operation.
In einer weiteren vorteilhaften Ausgestaltung weist die erfindungsgemäße Beschichtung eine Wärmeleitfähigkeit von höchstens 1 W/mK auf, um die wärmedämmende Wirkung der Beschichtung zu optimieren.In a further advantageous embodiment, the coating according to the invention has a thermal conductivity of at most 1 W / mK in order to optimize the heat-insulating effect of the coating.
Der mindestens eine plättchenförmige keramische Werkstoff ist zweckmäßigerweise ausgewählt ist aus der Gruppe oxidkeramische Werkstoffe, carbidkeramische Werkstoffe, nitridkeramische Werkstoffe, boridkeramische Werkstoffe, silicidkeramische Werkstoffe und silikatkeramische Werkstoffe.The at least one platelet-shaped ceramic material is expediently selected from the group of oxide-ceramic materials, carbide-ceramic materials, nitride-ceramic materials, boride-ceramic materials, silicid ceramic materials and silicate ceramic materials.
Zu den oxidkeramischen Werkstoffen zählen beispielsweise ganz oder teilweise stabilisiertes ZrO2, Ce2O3, Y2O3, Al2TiO5, La2Zr2O7, SiO2, Al2O3, MgO, TiO2, Mullit (3Al2O3·2SiO2), HfO2 und Be2O3.The oxide-ceramic materials include, for example, fully or partially stabilized ZrO 2 , Ce 2 O 3 , Y 2 O 3 , Al 2 TiO 5 , La 2 Zr 2 O 7 , SiO 2 , Al 2 O 3 , MgO, TiO 2 , mullite ( 3Al 2 O 3 .2SiO 2 ), HfO 2 and Be 2 O 3 .
Zu den nitridkeramischen Werkstoffen gehören bspw. Bornitrid, insbesondere hexagonales Bornitrid, Aluminiumnitrid und Siliziumnitrid.The nitride ceramic materials include, for example, boron nitride, in particular hexagonal boron nitride, aluminum nitride and silicon nitride.
Zu den silikatkeramischen Werkstoffen gehören Werkstoffe, deren Kristallstruktur [SiO4]4–-Tetraeder enthalten. Gut geeignet sind bspw. Schichtsilikate wie Montmorillonit. Ferner können Zirkonsilikate, Kalziumsilikate, Magnesiumsilikate sowie Ca/Mg/Al-Silikate verwendet werden, bspw. Glimmer, Talk, Serpentin, Muskovit, Kaolinit und Vermiculit.Silicate-ceramic materials include materials whose crystal structure contains [SiO 4 ] 4- tetrahedra. Well suited are, for example. Phyllosilicates such as montmorillonite. It is also possible to use zirconium silicates, calcium silicates, magnesium silicates and also Ca / Mg / Al silicates, for example mica, talc, serpentine, muscovite, kaolinite and vermiculite.
Geeignete carbidkeramische Werkstoffe sind bspw. Siliziumcarbid und Borcarbid. Als boridkeramische Werkstoffe können bspw. Zirkoniumborid, Hafniumborid und Titanborid verwendet werden. Ein weiterer geeigneter Werkstoff ist bspw. Aluminiumsilicid.Suitable carbide-ceramic materials are, for example, silicon carbide and boron carbide. For example, zirconium boride, hafnium boride and titanium boride can be used as boride ceramic materials. Another suitable material is, for example, aluminum silicide.
Vorzugsweise ist zwischen dem beschichteten Oberflächenbereich des Kolbens und der Beschichtung eine Haftschicht vorgesehen, um die Haftung zwischen der erfindungsgemäß vorgesehenen Beschichtung und dem Kolbenwerkstoff zu optimieren.Preferably, an adhesive layer is provided between the coated surface area of the piston and the coating in order to optimize the adhesion between the coating provided according to the invention and the piston material.
Geeignete Werkstoffe für die Haftschicht sind beispielsweise Verbindungen vom Typ MeCrAlY, wobei das Symbol Me für Nickel, Eisen und Kobalt steht. Haftschichten aus diesen Werkstoffen können bspw. mittels Flammspritzen auf den zu beschichtenden Oberflächenbereich des Kolbens aufgetragen werden. Auch Al2O3 ist als Werkstoff für die Haftschicht geeignet und wird bspw. mittels eines Sol-Gel-Verfahrens auf den zu beschichtenden Oberflächenbereich des Kolbens aufgetragen.Suitable materials for the adhesive layer are, for example, compounds of the type MeCrAlY, where the symbol Me stands for nickel, iron and cobalt. Adhesive layers of these materials can be applied, for example, by means of flame spraying onto the surface area of the piston to be coated. Also, Al 2 O 3 is suitable as a material for the adhesive layer and is applied, for example, by means of a sol-gel process on the surface area of the piston to be coated.
Zur Durchführung des erfindungsgemäßen Verfahrens kann als Treibmittel ein Pulver umfassend mindestens ein unedles Metall verwendet werden. Unter dem Begriff „unedles Metall” werden Metalle wie bspw. Eisen, Zink, Aluminium oder Magnesium verstanden, die bei den erfindungsgemäß vorgesehenen Verfahrensbedingungen in der von den Natrium- bzw. Kaliumsilikaten verursachten alkalischen Umgebung oxidieren. Dabei wird elementarer Wasserstoff freigesetzt, der erfindungsgemäß die Bildung der geschlossenzelligen Porenstruktur induziert.To carry out the process according to the invention, a powder comprising at least one non-noble metal can be used as blowing agent. The term "non-noble metal" means metals such as, for example, iron, zinc, aluminum or magnesium, which oxidize at the process conditions provided according to the invention in the alkaline environment caused by the sodium or potassium silicates. This elemental hydrogen is released, which induces the formation of the closed-cell pore structure according to the invention.
Ferner können zur Durchführung des erfindungsgemäßen Verfahrens Treibmittel verwendet werden, die, bspw. bei leichter Erwärmung, CO2 freisetzen, wie bspw. Carbonate und Hydrogencarbonate, insbesondere Ammoniumhydrogencarbonat (Hirschhornsalz), Natriumhydrogencarbonat und Kaliumcarbonat. In diesem Fall wird die erfindungsgemäße Bildung der geschlossenzelligen Porenstruktur durch das freigesetzte CO2 induziert.Furthermore, propellants can be used to carry out the process according to the invention, for example, with slight warming, release CO 2 , such as. Carbonates and bicarbonates, especially ammonium bicarbonate (Hirschhornsalz), sodium bicarbonate and potassium carbonate. In this case, the formation of the closed-cell pore structure according to the invention is induced by the released CO 2 .
Vorzugsweise erfolgt das Aushärten der Beschichtung durch langsame Erwärmung auf 400°C. Hierbei wird Wasser freigesetzt und die geschlossenzellige Porenstruktur stabilisiert sowie auf besonders einfache Weise die notwendige Druckfestigkeit der erfindungsgemäßen Beschichtung erhalten.Preferably, the curing of the coating by slow heating to 400 ° C. In this case, water is released and the closed-cell pore structure stabilized and obtained in a particularly simple manner, the necessary compressive strength of the coating of the invention.
Ein Ausführungsbeispiel der vorliegenden Erfindung wird im Folgenden anhand der beigefügten Zeichnung näher erläutert. Die einzige
Der Kolbenkopf
Der Kolbenschaft
Erfindungsgemäß ist bei dem in
Die wärmedämmende Beschichtung
Die wärmedämmende Beschichtung
Zunächst wird der zu beschichtende Oberflächenbereich des Kolbens
Nach dem Auftragen der Haftschicht
Nach Abschluss dieses Vorgangs wird die Beschichtung (
Statt Hirschhornsalz kann auch eine andere, Kohlendioxid freisetzende chemische Verbindung wie Natriumhydrogencarbonat oder Kaliumcarbonat verwendet werden. Dann wird der zu beschichtende Oberflächenbereich vorab auf eine Temperatur erwärmt, bei der das Natriumhydrogencarbonat bzw. das Kaliumcarbonat thermisch zerfallen, wobei Kohlendioxid freigesetzt wird.Instead of Hirschhornsalz can also be another carbon dioxide-releasing chemical compound such as sodium bicarbonate or potassium carbonate can be used. Then, the surface area to be coated is preliminarily heated to a temperature at which the sodium hydrogencarbonate or the potassium carbonate thermally decompose, releasing carbon dioxide.
Statt Hirschhornsalz oder einer anderen, Kohlendioxid freisetzenden, chemischen Verbindung kann auch ein Pulver aus mindestens einem unedlen Metall als Treibmittel verwendet werden. In der alkalischen Umgebung der Suspension wird das Metallpulver oxidiert, wobei elementarer Wasserstoff freigesetzt wird, der die Bildung der geschlossenzelligen Porenstruktur bewirkt. In diesem Fall entfällt die vorhergehende Erwärmung des zu beschichtenden Oberflächenbereichs auf etwa 70°C bis 90°C.Instead of deer's salt or another carbon dioxide-releasing chemical compound, a powder of at least one base metal may also be used as blowing agent. In the alkaline environment of the suspension, the metal powder is oxidized, releasing elemental hydrogen, which causes the formation of the closed-cell pore structure. In this case, the previous heating of the surface area to be coated accounts for about 70 ° C to 90 ° C.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- JP 61-268850 A [0003] JP 61-268850A [0003]
- JP 61-261645 [0004] JP 61-261645 [0004]
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210025283 DE102012025283A1 (en) | 2012-12-21 | 2012-12-21 | Piston useful for an internal combustion engine comprises a piston head comprising a piston base and a peripheral piston junk and a piston shaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210025283 DE102012025283A1 (en) | 2012-12-21 | 2012-12-21 | Piston useful for an internal combustion engine comprises a piston head comprising a piston base and a peripheral piston junk and a piston shaft |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012025283A1 true DE102012025283A1 (en) | 2014-06-26 |
Family
ID=50878348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201210025283 Pending DE102012025283A1 (en) | 2012-12-21 | 2012-12-21 | Piston useful for an internal combustion engine comprises a piston head comprising a piston base and a peripheral piston junk and a piston shaft |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102012025283A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016092078A1 (en) * | 2014-12-11 | 2016-06-16 | Mahle International Gmbh | Piston for an internal combustion engine |
DE102014018694A1 (en) | 2014-12-18 | 2016-06-23 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
WO2016135014A1 (en) | 2015-02-24 | 2016-09-01 | Oerlikon Surface Solutions Ag, Pfäffikon | Method for coating motor pistons |
WO2016198618A1 (en) * | 2015-06-12 | 2016-12-15 | Mahle International Gmbh | Method for coating the surface of a closed cooling channel of a piston for an internal combustion engine and piston that can be produced by said method |
DE102017207236A1 (en) | 2017-04-28 | 2018-10-31 | Mahle International Gmbh | Piston for an internal combustion engine |
WO2018202861A1 (en) * | 2017-05-05 | 2018-11-08 | Federal-Mogul Nürnberg GmbH | Thermally insulating the central cone of a steel piston |
DE102017208535A1 (en) * | 2017-05-19 | 2018-11-22 | Federal-Mogul Nürnberg GmbH | Thermal insulation of the center cone of a steel piston |
DE102017222333A1 (en) * | 2017-12-11 | 2019-06-13 | Bayerische Motoren Werke Aktiengesellschaft | Piston for an internal combustion engine |
CN113882963A (en) * | 2020-07-03 | 2022-01-04 | 马勒国际有限公司 | Piston for an internal combustion engine and internal combustion engine |
EP3936637A1 (en) | 2020-07-07 | 2022-01-12 | MAHLE International GmbH | Method for coating a piston |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3963547A (en) * | 1973-04-11 | 1976-06-15 | Toyota Jidosha Kogyo Kabushiki Kaisha | Method of manufacturing composite heat-insulating material |
DE2801362A1 (en) * | 1978-01-13 | 1979-07-19 | Motoren Turbinen Union | Fluid cooled IC engine piston crown - has heat damping ceramic sheet defining closed chamber for heat transfer from piston crown |
JPS5815742A (en) * | 1981-07-21 | 1983-01-29 | Nippon Kokan Kk <Nkk> | Engine part having flamed surface |
DE2936630C2 (en) * | 1979-09-11 | 1985-05-09 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | Pistons for an internal combustion engine |
DE3133223C2 (en) * | 1980-08-22 | 1986-07-31 | Chevron Research Co., San Francisco, Calif. | Internal combustion engine |
JPS61261645A (en) | 1985-05-15 | 1986-11-19 | Isuzu Motors Ltd | Heat insulating wall structure of thermal engine |
JPS61268850A (en) | 1985-05-23 | 1986-11-28 | Isuzu Motors Ltd | Construction of heat insulating wall in heat engine or the like |
DE3309699C2 (en) * | 1983-03-18 | 1990-01-04 | Feldmuehle Ag, 4000 Duesseldorf, De | |
DE3905871A1 (en) * | 1989-02-24 | 1990-08-30 | Reinz Dichtungs Gmbh | Composite material |
DE19542944C2 (en) * | 1995-11-17 | 1998-01-22 | Daimler Benz Ag | Internal combustion engine and method for applying a thermal barrier coating |
DE69313456T2 (en) * | 1992-09-30 | 1998-04-02 | United Technologies Corp | Ceramic composite coating material |
-
2012
- 2012-12-21 DE DE201210025283 patent/DE102012025283A1/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3963547A (en) * | 1973-04-11 | 1976-06-15 | Toyota Jidosha Kogyo Kabushiki Kaisha | Method of manufacturing composite heat-insulating material |
DE2801362A1 (en) * | 1978-01-13 | 1979-07-19 | Motoren Turbinen Union | Fluid cooled IC engine piston crown - has heat damping ceramic sheet defining closed chamber for heat transfer from piston crown |
DE2936630C2 (en) * | 1979-09-11 | 1985-05-09 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | Pistons for an internal combustion engine |
DE3133223C2 (en) * | 1980-08-22 | 1986-07-31 | Chevron Research Co., San Francisco, Calif. | Internal combustion engine |
JPS5815742A (en) * | 1981-07-21 | 1983-01-29 | Nippon Kokan Kk <Nkk> | Engine part having flamed surface |
DE3309699C2 (en) * | 1983-03-18 | 1990-01-04 | Feldmuehle Ag, 4000 Duesseldorf, De | |
JPS61261645A (en) | 1985-05-15 | 1986-11-19 | Isuzu Motors Ltd | Heat insulating wall structure of thermal engine |
JPS61268850A (en) | 1985-05-23 | 1986-11-28 | Isuzu Motors Ltd | Construction of heat insulating wall in heat engine or the like |
DE3905871A1 (en) * | 1989-02-24 | 1990-08-30 | Reinz Dichtungs Gmbh | Composite material |
DE69313456T2 (en) * | 1992-09-30 | 1998-04-02 | United Technologies Corp | Ceramic composite coating material |
DE19542944C2 (en) * | 1995-11-17 | 1998-01-22 | Daimler Benz Ag | Internal combustion engine and method for applying a thermal barrier coating |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016092078A1 (en) * | 2014-12-11 | 2016-06-16 | Mahle International Gmbh | Piston for an internal combustion engine |
DE102014018694A1 (en) | 2014-12-18 | 2016-06-23 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
WO2016135014A1 (en) | 2015-02-24 | 2016-09-01 | Oerlikon Surface Solutions Ag, Pfäffikon | Method for coating motor pistons |
US10487394B2 (en) | 2015-02-24 | 2019-11-26 | Oerlikon Surface Solutions Ag, Pfäffikon | Method for coating motor pistons |
US10252293B2 (en) | 2015-06-12 | 2019-04-09 | Mahle International Gmbh | Method for coating cooling channel with coating containing hexagonal boron nitride |
WO2016198618A1 (en) * | 2015-06-12 | 2016-12-15 | Mahle International Gmbh | Method for coating the surface of a closed cooling channel of a piston for an internal combustion engine and piston that can be produced by said method |
DE102017207236A1 (en) | 2017-04-28 | 2018-10-31 | Mahle International Gmbh | Piston for an internal combustion engine |
WO2018197338A1 (en) | 2017-04-28 | 2018-11-01 | Mahle International Gmbh | Piston for an internal combustion engine |
WO2018202861A1 (en) * | 2017-05-05 | 2018-11-08 | Federal-Mogul Nürnberg GmbH | Thermally insulating the central cone of a steel piston |
DE102017208535A1 (en) * | 2017-05-19 | 2018-11-22 | Federal-Mogul Nürnberg GmbH | Thermal insulation of the center cone of a steel piston |
DE102017222333A1 (en) * | 2017-12-11 | 2019-06-13 | Bayerische Motoren Werke Aktiengesellschaft | Piston for an internal combustion engine |
CN113882963A (en) * | 2020-07-03 | 2022-01-04 | 马勒国际有限公司 | Piston for an internal combustion engine and internal combustion engine |
EP3936637A1 (en) | 2020-07-07 | 2022-01-12 | MAHLE International GmbH | Method for coating a piston |
DE102020208462A1 (en) | 2020-07-07 | 2022-01-13 | Mahle International Gmbh | Process for coating a piston |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102012025283A1 (en) | Piston useful for an internal combustion engine comprises a piston head comprising a piston base and a peripheral piston junk and a piston shaft | |
EP2905455B1 (en) | Method for coating a bore and cylinder block of an internal combustion engine | |
DE3401433C2 (en) | Process for coating parts of combustion chambers in engines and its application | |
EP0119499A1 (en) | Cylinder head and manufacturing method | |
EP0075228A2 (en) | Heat insulating ceramic coating having a resistance to high temperatures and to thermal shocks | |
DE102016106931A1 (en) | A method of forming a heat-shielding film and heat-shielding film structure | |
DE102011086803A1 (en) | Repair method of a cylinder surface by means of plasma spraying | |
DE102011056307A1 (en) | Brake disc, used for motor car, includes brake disc pot, and brake disc ring provided with friction surfaces, where brake disc ring consists of cast iron material, which is coated with protective coating in region of the friction surfaces | |
DE112015002677T5 (en) | Double layer metal coating of a light metal substrate | |
DE102010051682A1 (en) | Lightweight crankshaft and manufacturing process thereof | |
DE202014010319U1 (en) | Enamel powder and metal component with a provided with an enamel coating surface section | |
DE102014018694A1 (en) | Piston for an internal combustion engine and method for its production | |
DE102014201337A1 (en) | Piston for a piston engine | |
DE3303048C2 (en) | Pre or vortex chamber for internal combustion engines and processes for their manufacture | |
DE4212716A1 (en) | IC engine cylinder lining - made of hypereutectic aluminium@-silicon@ alloy whose outer surface is completely oxide-free prior to casting cylinder | |
DE102011114771A1 (en) | Cylinder head with an integrated exhaust manifold for an internal combustion engine and method for producing a cast component, in particular a cylinder head for an internal combustion engine | |
EP2723916B1 (en) | Casting component, and method for the application of an anticorrosive layer | |
DE102012113225A1 (en) | Combustion chamber coating for engines | |
EP3433396B1 (en) | Coated valve for combustion engines | |
DE102014202135B4 (en) | Method for coating a bore, cylinder lining and cylinder block of an internal combustion engine | |
WO2018197338A1 (en) | Piston for an internal combustion engine | |
EP2980263A1 (en) | Component made from a molybdenum alloy and manufacturing method for the same | |
WO2018002206A1 (en) | Wash composition for making facings on temporary molds or on cores for iron and steel casting operations | |
DE102014005096A1 (en) | Cylinder liner, assembly and method for manufacturing a cylinder liner | |
EP0432699A2 (en) | Metal article protected against burning titanium and method of making the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: C23C0026000000 Ipc: C23C0022730000 |
|
R163 | Identified publications notified | ||
R082 | Change of representative |
Representative=s name: BRP RENAUD UND PARTNER MBB RECHTSANWAELTE PATE, DE |
|
R012 | Request for examination validly filed | ||
R016 | Response to examination communication |