DE245193T1 - Verfahren zur herstellung von keramischen verbundformkoerpern mittels anwendung einer sperre. - Google Patents

Verfahren zur herstellung von keramischen verbundformkoerpern mittels anwendung einer sperre.

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Publication number
DE245193T1
DE245193T1 DE198787630076T DE87630076T DE245193T1 DE 245193 T1 DE245193 T1 DE 245193T1 DE 198787630076 T DE198787630076 T DE 198787630076T DE 87630076 T DE87630076 T DE 87630076T DE 245193 T1 DE245193 T1 DE 245193T1
Authority
DE
Germany
Prior art keywords
reaction product
oxidation reaction
oxidizing agent
metal
molten metal
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
Application number
DE198787630076T
Other languages
English (en)
Inventor
Robert C. Newark Delaware 19714 Kantner
Marc S. Newark Delaware 19711 Newkirk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanxide Technology Co LP
Original Assignee
Lanxide Technology Co LP
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lanxide Technology Co LP filed Critical Lanxide Technology Co LP
Publication of DE245193T1 publication Critical patent/DE245193T1/de
Pending legal-status Critical Current

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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
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    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
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    • C04B2237/36—Non-oxidic
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    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/61—Joining two substrates of which at least one is porous by infiltrating the porous substrate with a liquid, such as a molten metal, causing bonding of the two substrates, e.g. joining two porous carbon substrates by infiltrating with molten silicon
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    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/76—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc
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Claims (21)

EP 87630076.5 Lanxide Technology Company(LP Patentansprüche
1. Verfahren zur Herstellung eines freitragenden keramischen Körpers durch Oxidation eines Grundmetalls unter Ausbildung eines polykristallinen Materials, das im wesentlichen besteht aus (1) dem Oxidationsreaktionsprodukt des Grundmetalls mit einem Oxidationsmittel, einschließlich eines Dampfphasen-Oxidationsmittels, sowie, ggf., aus (2) einem oder mehreren metallischen Bestandteilen, wobei das Verfahren die Schritte umfaßt: (a) Versehen wenigstens eines Teils des Grundmetalls mit einem Sperrelement, das wenigstens teilweise in einem Abstand von dem Grundmetall angeordnet ist, um wenigstens eine Oberfläche des keramischen Körpers festzulegen; (b) Erhitzen dieses Grundmetalls auf eine Temperatur über seinem Schmelzpunkt jedoch unterhalb des Schmelzpunkts des Oxidationsreaktionsprodukts , um einen Körper aus geschmolzenem Metall zu bilden, und, bei dieser Temperatur, (i) Umsetzen des geschmolzenen Metalls mit dem Oxidationsmittel unter Bildung des Oxidationsreaktionsprodukts, (ii) Halten wenigstens eines Teils des Oxidationsreaktionsprodukts in Kontakt mit und zwischen dem geschmolzenen Metall und dem Oxidationsmittel, um geschmolzenes Metall durch das Oxidationsreaktionsprodukt zu dem Sperrelement und in einen Kontakt mit dem Oxidationsmittel zu transportieren, so daß das Oxidationsreaktionsprodukt sich fortgesetzt an der Grenzfläche zwischen dem Oxidationsmittel und dem vorher gebildeten Oxidationsreaktionsprodukt bildet, und (iii) Fortsetzen dieser Reaktion bis zu dem Sperrelement, um den keramischen Körper herzustellen, der eine Oberfläche aufweist, die durch das genannte Sperrelement festgelegt ist.
2. Verfahren zur Herstellung einer freitragenden keramischen Verbundmaterialstruktur mit einer Masse eines Füllstoffmaterials, das von einer keramischen Matrix infiltriert ist, die
02A5193 durch Oxidation eines Grundmetalls unter Ausbildung eines polykristallinen Matrixmaterials erhalten wurde, wobei dieses polykristalline Matrixmaterial im wesentlichen besteht aus (1) dem Oxidationsreaktionsprodukt des Grundmetalls mit einem oder mehreren Oxidationsmitteln, einschließlich eines Dampfphasen-Oxidationsmittels, und, ggf., aus (2) einem oder mehreren metallischen Bestandteilen, wobei das Verfahren die Schritte umfaßt: (a) Erhitzen des Grundmetalls auf eine Temperatur über seinem Schmelzpunkt, jedoch unterhalb des Schmelzpunkts des Oxidationsreaktionsprodukts, um einen Körper aus einem geschmolzenen Metall zu bilden, (b) Inkontaktbringen eines Bereichs der Masse des Füllstoffmaterials mit dem Körper aus geschmolzenem Metall, wobei die Masse des Füllstoffmaterials wenigstens eine Oberfläche aufweist, die durch ein Sperrelement definiert wird, das wenigstens teilweise in einem Abstand von dem genannten Kontaktbereich angeordnet ist, so daß die Bildung des Oxidationsreaktionsprodukts in die Masse des Füllstoffmaterials hinein und in einer Richtung zu dem Sperrelement erfolgt, und, bei dieser Temperatur, (i) Umsetzen des geschmolzenen Metalls mit dem Oxidationsmittel unter Ausbildung des Oxidationsreaktionsprodukts, (ii) Halten wenigstens eines Teils des Oxidationsreaktionsprodukts in Kontakt mit und zwischen dem geschmolzenen Metall und dem Oxidationsmittel, um fortschreitend geschmolzenes Metall durch das Oxidationsreaktionsprodukt zu dem Oxidationsmittel zu transportieren, so daß sich das Oxidationsreaktionsprodukt fortgesetzt an der Grenzfläche zwischen dem Oxidationsmittel und dem vorher gebildeten Oxidationsreaktionsprodukt, das die Masse des Füllstoff materials infiltriert hat, neu bildet, und (iii) Fortsetzen dieser Reaktion bis zu dem Sperrelement, um die keramische Verbundmaterialstruktur herzustellen, die eine Oberfläche aufweist, die durch das Sperrelement festgelegt ist.
3. Verfahren zur Herstellung eines keramischen Verbundmaterialkörpers einer gewünschten Form mit einer Vorform, die von einer keramischen Matrix infiltriert ist, die durch Oxidation eines Grundmetalls unter Bildung einer polykristallinen Matrix erhalten wurde, wobei diese polykristalline Matrix im wesent-
lichen besteht aus (1) dem Oxidationsreaktionsprodukt des Grundmetalls mit einem oder mehreren Oxidationsmitteln, einschließlich eines Dampfphasen-Oxidationsmittels, und, ggf., aus (2) einem oder mehreren metallischen Bestandteilen, wobei das Verfahren die Schritte umfaßt: (a) Erhitzen des Grundmetalls auf eine Temperatur oberhalb seines Schmelzpunkts, jedoch unterhalb des Schmelzpunkts des Oxidationsreaktionsprodukts, um einen Körper aus geschmolzenem Metall zu bilden, (b) Vorsehen einer geformten Vorform mit wenigstens einer Oberfläche, die durch ein Sperrelement definiert ist, wobei diese Vorform bezüglich einer Infiltration durch das Oxidationsreaktionsprodukt permeabel ist, (c) Inkontaktbringen eines Bereichs dieser Vorform mit dem Körper aus geschmolzenem Metall, wobei die Oberfläche der Vorform in einem Abstand von dem Kontaktbereich angeordnet ist, so daß die Bildung des Oxidationsreaktionsprodukts in die Vorform hinein und in eine Richtung zu dieser Oberfläche hin erfolgt, und, bei der genannten Temperatur, (i) Umsetzen des geschmolzenen Metalls mit dem Oxidationsmittel, um das Oxidationsreaktionsprodukt zu bilden, (ü) Halten wenigstens eines Teils des Oxidationsreaktionsprodukts in Kontakt mit und zwischen dem geschmolzenen Metall und dem Oxidationsmittel, um fortschreitend geschmolzenes Metall durch das Oxidationsreaktionsprodukt zu dem Oxidationsmittel zu transportieren, so daß sich fortgesetzt das Oxidationsreaktionsprodukt an der Grenzfläche zwischen dem Oxidationsmittel und dem vorher gebildeten Oxidationsreaktionsprodukt, das die Vorform infiltriert hat, neu bildet, und (iii) Fortsetzen dieser Reaktion, bis die polykristalline Matrix die Vorform bis zu dem,Sperrelement unter Herstellung des keramischen Verbundmaterialkörpers infiltriert hat und die Konfiguration der Vorform und eine Oberfläche, die durch das Sperrelement festgelegt ist, aufweist.
4. Verfahren nach Anspruch 1, 2 oder 3, bei dem das Sperrelement beim Kontakt mit dem transportierten schmelzflüssigen Grundmetall im wesentlichen durch dieses transportierte geschmolzene Grundmetall unbenetzbar ist.
I « · · ·> ·. * I · * * * it · ·
5. Verfahren nach Anspruch 1, 2 oder 3, bei dem das Sperrelement beim Kontakt mit dem transportierten geschmolzenen Metall mit diesem transportierten geschmolzenen Grundmetall reagiert, so daß der Transport des genannten geschmolzenen Grundmetalls durch das Oxidationsreaktionsprodukt im wesentlichen verhindert wird.
6. Verfahren nach den Ansprüchen 1, 2 oder 3, bei dem das Sperrelement ausgewählt ist aus einer Gruppe, die besteht aus Calciumsulfat, Calciumsilicat, Portlandzement, Tricalciumphosphat oder deren Mischungen und ggf. Siliciumdioxid und Calciumsulfat einschließt.
7. Verfahren nach Anspruch 6, bei dem das Sperrelement zu-
sätzlich ein verflüchtigbares Material enthält, um das Sperrelement unter den Verfahrensbedingungen durchlässig zu machen.
8. Verfahren nach Anspruch 6, bei dem das Sperrelement zusätzlich einen Füllstoff enthält.
9. Verfahren nach Anspruch 8, bei dem der genannte Füllstoff eine teilchenförmige Form aufweist und im wesentlichen den gleichen Ausdehnungskoeffizienten wie das Füllstoff material oder die Vorform aufweist.
10. Verfahren nach Anspruch 8 oder 9, bei dem der Füllstoff Aluminiumoxid ist.
11. Verfahren nach den Ansprüchen 1, 2 oder 3, bei dem das Sperrelement nichtrostenden Stahl oder eine dichte Keramik enthält.
12. Verfahren nach den Ansprüchen 1, 2 oder 3, bei dem das Grundmetall ausgewählt ist aus einer Gruppe, die aus Aluminium, Silicium, Titan, Zinn, Zirkonium und Hafnium besteht.
13. Verfahren nach den Ansprüchen 2 oder 3, bei dem das Oxidationsmittel wenigstens ein festes Oxidationsmittel
oder ein flüssiges Oxidationsmittel oder eine Kombination eines festen Oxidationsmittels und eines flüssigen Oxidationsmittels einschließt, das oder die in das Füllstoffmaterial oder die Vorform inkorporiert sind.
14. Verfahren nach Anspruch 12, bei dem das feste Oxidationsmittel aus einer Gruppe ausgewählt ist, die aus Siliciumdioxid, Bor und reduzierbaren Boriden besteht.
15. Verfahren nach den Ansprüchen 1, 2 oder 3, bei dem das Oxidationsmittel aus einer Gruppe ausgewählt ist, die aus einem sauerstoffhaltigen Gas, einem stickstoffhaltigen Gas, einem Halogen, Schwefel, Phosphor, Arsen, Kohlenstoff, Bor, Selen, Tellur, einer E^/H^O-Mischung, Methan, Ethan, Propan, Acetylen, Ethylen, Propylen, Siliciumdioxid und einer CO/CO2-Mischung oder Mischungen davon besteht.
16. Verfahren nach Anspruch 3, bei dem die Vorform Materialien enthält, die aus einer Gruppe ausgewählt sind, die aus Siliciumdioxid, Siliciumcarbid und Aluminiumoxid besteht.
17. Verfahren nach den Ansprüchen 1, 2 oder 3, bei dem in Verbindung mit dem Grundmetall eine Quelle für ein Dotierungsmittel verwendet wird.
18. Verfahren nach Anspruch 17, bei dem die Quelle für das Dotierungsmittel eine Quelle für zwei oder mehr der Elemente Magnesium, Zink, Silicium, Germanium, Zinn, Blei, Bor, Natrium, Lithium, Calcium, Phosphor, Yttrium und seltene Erden einschließt.
19. Verfahren nach Anspruch 18, bei dem das Grundmetall Aluminium ist und das polykristalline Metall außerdem eine Startoberfläche aus einem Spinell aufweist, der als das Oxidationsreaktionsprodukt des Grundmetalls, der Dotierungsmittel-Quelle und des Oxidationsmittels gebildet wurde.
20. Verfahren nach Anspruch 17, bei dem das Grundmetall Alu-
minium ist und wenigstens eine Dotierungsmxttelquelle einschließt, die mit dem Grundmetall legiert ist, sowie wenigstens eine Dotierungsmxttelquelle, die auf die Oberfläche des Grundmetalls aufgebracht ist.
21. Verfahren nach den Ansprüchen 1, 2 oder 3, bei dem das Grundmetall Aluminium ist und in Verbindung mit einer Dotierungsmittel-Quelle verwendet wird, das Oxidationsmittel Luft ist, die Erhitzungsstufe bei einer Temperatur zwischen 8500C und 1450°C durchgeführt wird und das Oxidationsreaktionsprodukt Aluminiumoxid ist.
DE198787630076T 1986-05-08 1987-04-30 Verfahren zur herstellung von keramischen verbundformkoerpern mittels anwendung einer sperre. Pending DE245193T1 (de)

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EP0116809B1 (de) * 1983-02-16 1990-05-02 MOLTECH Invent S.A. Gesinterte Metall-Keramikverbundwerkstoffe und ihre Herstellung
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NZ211405A (en) * 1984-03-16 1988-03-30 Lanxide Corp Producing ceramic structures by oxidising liquid phase parent metal with vapour phase oxidising environment; certain structures
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NO175676C (no) 1994-11-16
BG50155A3 (en) 1992-05-15
DE3777871D1 (de) 1992-05-07
BR8702282A (pt) 1988-02-17
IL82463A0 (en) 1987-11-30
HUT46615A (en) 1988-11-28
IE60942B1 (en) 1994-09-07
NO871828L (no) 1987-11-09
FI872020A0 (fi) 1987-05-06
TR23773A (tr) 1990-09-12
CS8703236A3 (en) 1992-02-19
EP0245193A2 (de) 1987-11-11
ES2000419A4 (es) 1988-03-01
KR950004064B1 (ko) 1995-04-25
YU81387A (en) 1988-08-31
FI86296C (fi) 1992-08-10
CN87103352A (zh) 1988-03-30
PL154669B1 (en) 1991-09-30
IL82463A (en) 1991-06-30
PT84843B (pt) 1990-02-08
IN167358B (de) 1990-10-13
JP2518847B2 (ja) 1996-07-31
PT84843A (en) 1987-06-01
NO871828D0 (no) 1987-05-04
PL265520A1 (en) 1988-07-21
AU591280B2 (en) 1989-11-30
DK166963B1 (da) 1993-08-09
RU2039023C1 (ru) 1995-07-09
IE871144L (en) 1987-11-08
ZA872585B (en) 1987-09-30
DK233287A (da) 1987-11-09
ES2000419T3 (es) 1993-03-01
EP0245193B1 (de) 1992-04-01
CA1313942C (en) 1993-03-02
FI86296B (fi) 1992-04-30
FI872020A (fi) 1987-11-09
CN1033021C (zh) 1996-10-16
GR3005073T3 (de) 1993-05-24
DK233287D0 (da) 1987-05-07
ATE74339T1 (de) 1992-04-15
PH26793A (en) 1992-10-13
HU198429B (en) 1989-10-30
JPS6330377A (ja) 1988-02-09
MX166922B (es) 1993-02-15
AU7261787A (en) 1987-11-12
YU46617B (sh) 1994-01-20
EP0245193A3 (en) 1988-03-23
CS275463B2 (en) 1992-02-19
NO175676B (no) 1994-08-08
NZ220182A (en) 1990-06-26
US4923832A (en) 1990-05-08
KR870011061A (ko) 1987-12-19

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