SU571180A3 - Method of obtaining sintered diboride-based of porous materials - Google Patents
Method of obtaining sintered diboride-based of porous materialsInfo
- Publication number
- SU571180A3 SU571180A3 SU7201872555A SU1872555A SU571180A3 SU 571180 A3 SU571180 A3 SU 571180A3 SU 7201872555 A SU7201872555 A SU 7201872555A SU 1872555 A SU1872555 A SU 1872555A SU 571180 A3 SU571180 A3 SU 571180A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- diboride
- powder
- sintering
- porous materials
- mixture
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
- C04B35/645—Pressure sintering
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/5805—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
- C04B35/58064—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/5805—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
- C04B35/58064—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides
- C04B35/58071—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides based on titanium borides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/5805—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
- C04B35/58064—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides
- C04B35/58078—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides based on zirconium or hafnium borides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Ceramic Products (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Conductive Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Resistance Heating (AREA)
Description
(54)(54)
СПОСОБ ПОЛУЧЕНИЯ СПЕЧЕННЫХ ПОРИСТЫХ МАТЕРИАЛОВ НА ОСНОВЕ ДИБОРИДА МЕТАЛЛАMETHOD OF OBTAINING SINTERED POROUS MATERIALS BASED ON METAL DIBORIDE
Изобретение относитс к области порошковой металлургии, в частности к способам получени спеченных пористых материалов на основе диборида металла.The invention relates to the field of powder metallurgy, in particular, to methods for producing sintered porous materials based on metal diboride.
Известен способ получени спеченных пористых материалов на основе тугоплавких соедине1вш, предусматривающий гранулирование исходного порошка путем его спека1ш и измельчени , формование из полученных гранул заготовок и их спекание.A known method for producing sintered porous materials based on refractory compounds, which involves granulating the starting powder by sintering it and grinding it, molding the obtained blanks from the obtained granules, and sintering them.
Однако при получении известным способом прочных материалов высокой пористости на основе боридов, карбвдов, силишадов, нитридов требуетс высока температура спека1ш или проведение операции формовани с пршюжением давлени .However, when producing high porosity materials based on borides, carbides, silishads, nitrides, by a known method, high temperature specimens or a pressure forming molding operation is required.
Высока температура спекатш , прессование порошка до или после спекани способствуют повышению модул Юига получаемого материала.The high temperature of spekatsh, pressing the powder before or after sintering contributes to the improvement of the Yuig module of the resulting material.
Известный способ не обеспечивает достижени таких характеристик, как увеличение энергии поверхностного гат жени , уменьшени модул Юнга и уменьшени коэффициента линейного расширени , то есть характеристик, определ ющих стойкость материала к термическим нагрузкам и его меха1шческу1о прочность.The known method does not ensure the achievement of such characteristics as an increase in the energy of the surface enrichment, a decrease in the Young's modulus and a decrease in the linear expansion coefficient, i.e. the characteristics that determine the resistance of the material to thermal loads and its mechanical strength.
С целью повышени стойкости к тепловым нагрузкам и механической прочности материалов перед формованием гранулированию подвергают часть порошка, оставшуюс часть порошка смешивают с полученными гранулами, в смесь ввод т 1-6 вес.% фторида щелочного Или шелочноземельного металла, формование осуществл ют виброобработкой , а спекание провод т при 1000-1500° С.In order to increase the resistance to thermal stress and the mechanical strength of the materials, some of the powder is subjected to granulation, the remaining part of the powder is mixed with the obtained granules, 1-6 wt.% Of alkali fluoride or silk-earth metal are introduced into the mixture, the sintering is performed by vibrating t at 1000-1500 ° C.
П р и м е р 1. Смесь порошков с размером частиц несколько микрон, содержащую 85% диборида титана и 15% дисилицида титана, подвергают гранулированию путем гор чего прессовани при 1800° С и последующего измельчени до размера гранул в несколько миллиметров. Затем готов т смесь, состо щую из 60% полученных гранул и 40% Исходного порошка.Example 1 A mixture of powders with a particle size of several microns, containing 85% titanium diboride and 15% titanium disilicide, is subjected to granulation by hot pressing at 1800 ° C and subsequent grinding to a grain size of several millimeters. A mixture is then prepared consisting of 60% of the obtained granules and 40% of the starting powder.
В приготовлетшую смесь ввод т 3 вес.% фторида лити , смесь помещают в форму, подвергают кратковременной виброобработке, а затем спекают при 1350° С в течение 2 час в атмосфере аргона.3% by weight of lithium fluoride is introduced into the prepared mixture, the mixture is placed in a mold, subjected to short-term vibro-processing, and then sintered at 1350 ° C for 2 hours in an argon atmosphere.
П р и м е р 2. Гранулы диборида гафни (65%PRI mme R 2. Granules of hafnium diboride (65%
от общей массы смеси), нолучекЕпле гор чим пресcoBamieM исходного порошка диборида гафни приof the total mass of the mixture), butchWarm a hot pressBamieM of the initial powder of hafnium diboride at
2000° С с последующим измельчением, смеишвают с2000 ° C, followed by grinding, mixed with
35% тонкого порсипка.35% thin porcipka.
Затем в эту смесь ввод т 4 вес.% фторида лити , после чего смесь подвергают виброобработке в графитовой форме и спеканию в атмосфере аргона при 1000° С в течение 2ч.Then, 4% by weight of lithium fluoride is introduced into this mixture, after which the mixture is subjected to vibro-processing in graphite form and sintering in argon atmosphere at 1000 ° C for 2 hours.
Керамические материалы на основе диборида металла, полученные предложенным способом, имеют пористость 30-35% и хорошую механическую щючность.Ceramic materials based on metal diboride, obtained by the proposed method, have a porosity of 30-35% and a good mechanical stability.
Использование смеси гранул с порошкоМ; позвол ет увеличить энергию поверхностного нат жеНИН и исключить уплотнение смеси внешинм давлением .Use a mixture of granules with powder; allows you to increase the energy of surface tension and eliminate compaction of the mixture by external pressure.
Введение фторида щелочного или щелочноземельного металла в смесь в количестве 1-6 вес.% позвол ет активировать процесс спекани материвла на основе диборидов переходных металлов, CJffl3HTb температ ру спекани этих материалов при сохранении высокой пористости и хорошей механической прочности.The introduction of alkali or alkaline earth metal fluoride into the mixture in the amount of 1-6 wt.% Allows activating the sintering process of the material based on transition metal diborides, the CJffl3HTb sintering temperature of these materials while maintaining high porosity and good mechanical strength.
Увеличение энергии поверхностного нат жени за счет смешивани гранул с порошком, увеличение модул Юнга материала за счет снижени плотности при исключе {ии использовани высоких температур спекани , увеличение пористости материала применением кратковремешюй виброобработки и 1ИЗКОЙ температуры спекани и уменьшение в св зи с этим коэффициента линейного расширени материала позвол ют повысить стойкость получаемых материалов к тепловым нагрузкам и их механическую прочность.Increasing the surface tension energy due to mixing the granules with the powder, increasing the Young's modulus of the material by reducing the density while eliminating the use of high sintering temperatures, increasing the porosity of the material using short-term vibrating processing and 1 LOW sintering temperature and reducing the coefficient of linear expansion of the material they allow to increase the resistance of the obtained materials to thermal loads and their mechanical strength.
Керамические пористые материалы на основе диборидов переходных металлов, полученные предложенным способом, хорошо провод т электрический ток, химически пассивны в присутствии жидкого металла, обеспечивают хорошую смачиваемость, Ceramic porous materials based on transition metal diborides, obtained by the proposed method, conduct electricity well, are chemically passive in the presence of a liquid metal, provide good wettability,
стойки к тепловым mipyaKaM и обладают хорошей жаростойкостью при высоких температурах.resistant to thermal mipyaKaM and have good heat resistance at high temperatures.
Введе1ше в порошок диборида переходного металла его дисилицида позвол ет повысить эти свойства .The introduction of its disilicide into the transition metal diboride powder makes it possible to increase these properties.
В качестве диборида может быть использован щйорид одного из металлов из группы титан, цирконий, гафний, вольфрам.Schichoride of one of the metals from the group titanium, zirconium, hafnium, and tungsten can be used as diboride.
В качестве силшцща может быть использован дисилнцид того же или другого металла из этой же группы.Disilcide of the same or another metal from the same group can be used as a silscale.
Полученш 1е предложенным епоссбом спеченные пористые керамические материалы могут быть использованы в конструкци х насосов дл перекачки жидкого металла. Их можно использовать также дл изготовлени электродов или дл несложного изготовлени элементов труб опрокидов пр мого нагрева на основе эффекта Джоул .The resulting 1e proposed by the epossbum sintered porous ceramic materials can be used in the construction of pumps for pumping liquid metal. They can also be used for the manufacture of electrodes or for the simple manufacture of direct heating trough tube elements based on the Joule effect.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7146212A FR2186960A5 (en) | 1971-12-22 | 1971-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
SU571180A3 true SU571180A3 (en) | 1977-08-30 |
Family
ID=9087904
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU7201872555A SU571180A3 (en) | 1971-12-22 | 1972-12-22 | Method of obtaining sintered diboride-based of porous materials |
SU742019074A SU674664A3 (en) | 1971-12-22 | 1974-04-25 | Charge for making heat- and electroconductive ceramic material |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU742019074A SU674664A3 (en) | 1971-12-22 | 1974-04-25 | Charge for making heat- and electroconductive ceramic material |
Country Status (11)
Country | Link |
---|---|
JP (3) | JPS4870904A (en) |
AU (1) | AU466721B2 (en) |
CA (1) | CA1023139A (en) |
CH (1) | CH574374A5 (en) |
DE (1) | DE2261523A1 (en) |
FR (1) | FR2186960A5 (en) |
GB (1) | GB1414178A (en) |
IT (1) | IT972582B (en) |
NO (1) | NO133193C (en) |
SE (1) | SE375754B (en) |
SU (2) | SU571180A3 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2262437B1 (en) * | 1974-02-21 | 1983-06-24 | Activite Atom Avance | |
JPS59184611U (en) * | 1983-05-27 | 1984-12-08 | 日立工機株式会社 | Electric cutter dust suction device |
JPS6342801A (en) * | 1986-08-08 | 1988-02-24 | 日立工機株式会社 | Portable dust-collecting circular saw |
-
1971
- 1971-12-22 FR FR7146212A patent/FR2186960A5/fr not_active Expired
-
1972
- 1972-12-15 DE DE19722261523 patent/DE2261523A1/en not_active Ceased
- 1972-12-15 CH CH1827572A patent/CH574374A5/xx not_active IP Right Cessation
- 1972-12-20 AU AU50301/72A patent/AU466721B2/en not_active Expired
- 1972-12-20 NO NO469872A patent/NO133193C/no unknown
- 1972-12-20 IT IT3319172A patent/IT972582B/en active
- 1972-12-21 SE SE1684572A patent/SE375754B/xx unknown
- 1972-12-21 CA CA159,627A patent/CA1023139A/en not_active Expired
- 1972-12-21 GB GB5925872A patent/GB1414178A/en not_active Expired
- 1972-12-22 JP JP12917172A patent/JPS4870904A/ja active Pending
- 1972-12-22 JP JP12917272A patent/JPS5542583B2/ja not_active Expired
- 1972-12-22 SU SU7201872555A patent/SU571180A3/en active
- 1972-12-22 JP JP12917372A patent/JPS5549032B2/ja not_active Expired
-
1974
- 1974-04-25 SU SU742019074A patent/SU674664A3/en active
Also Published As
Publication number | Publication date |
---|---|
SU674664A3 (en) | 1979-07-15 |
SE375754B (en) | 1975-04-28 |
CH574374A5 (en) | 1976-04-15 |
FR2186960A5 (en) | 1974-01-11 |
NO133193C (en) | 1976-03-24 |
AU5030172A (en) | 1974-06-20 |
DE2261523A1 (en) | 1973-06-28 |
JPS4870905A (en) | 1973-09-26 |
JPS4870904A (en) | 1973-09-26 |
NO133193B (en) | 1975-12-15 |
JPS5549032B2 (en) | 1980-12-09 |
JPS5542583B2 (en) | 1980-10-31 |
IT972582B (en) | 1974-05-31 |
JPS4870894A (en) | 1973-09-26 |
AU466721B2 (en) | 1974-06-20 |
GB1414178A (en) | 1975-11-19 |
CA1023139A (en) | 1977-12-27 |
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