IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0177133
(1998-10-22)
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우선권정보 |
DE9726598 (1997-10-22) |
발명자
/ 주소 |
- Kayser Ursula,DEX
- Haug Tilman,DEX
- Hertel Doris,DEX
- Rebstock Kolja,DEX
- Schaefer Wolfgang,DEX
- Knabe Helmut,DEX
- Vogel Walter,DEX
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
10 인용 특허 :
2 |
초록
▼
A ceramic composite includes (a) 30 to 60% by volume of C-fibers; (b) 10 to 55% by volume of a matrix made of SiC and C, wherein the weight ratio SiC:C is in the range of between 20:1 and 2:1; (c) 5 to 40% by volume porosity that may be open or closed. A base material is formed from a)+b)+c). The ce
A ceramic composite includes (a) 30 to 60% by volume of C-fibers; (b) 10 to 55% by volume of a matrix made of SiC and C, wherein the weight ratio SiC:C is in the range of between 20:1 and 2:1; (c) 5 to 40% by volume porosity that may be open or closed. A base material is formed from a)+b)+c). The ceramic composite also includes a protective system comprising at least one of (d) a lower protective layer that is situated directly on the base material consisting of one or more compounds comprising Si, C, B, O.sub.2 and having a thickness between 20 and 150 .mu.m; (e) a central protective layer that is situated above the lower protective layer consisting of at least one of transition metal borides and transition metal silicides in combination with SiC, SiO.sub.2 or SiOC, and having a thickness of from 50 to 250 .mu.m; and (f) an upper protective layer that is situated above the central protective layer consisting of one or more compounds comprising SiC, SiO.sub.2, MoSi.sub.2, Mo.sub.3 Si, Mo.sub.5 Si.sub.3, ZrB, ZrB.sub.2, ZrB.sub.12, Si.sub.3 N.sub.4, ZrO.sub.2, Y.sub.2 O.sub.3, Al.sub.2 O.sub.3, mixed oxides Al.sub.2 O.sub.3 --SiO.sub.2, and SiOC and having a thickness of from 20 to 250 .mu.m.
대표청구항
▼
[ What is claimed is:] [1.]1. A ceramic composite, comprising:a) 30 to 60% by volume of C-fibers;b) 10 to 55% by volume of a matrix made of SiC and C, wherein the weight ratio SiC:C is in the range of between 20:1 and 2:1;c) 5 to 40% by volume porosity that may be open or closed; rein a)+b)+c) form
[ What is claimed is:] [1.]1. A ceramic composite, comprising:a) 30 to 60% by volume of C-fibers;b) 10 to 55% by volume of a matrix made of SiC and C, wherein the weight ratio SiC:C is in the range of between 20:1 and 2:1;c) 5 to 40% by volume porosity that may be open or closed; rein a)+b)+c) form a base material; and a protective system comprising:d) a lower protective layer that is situated directly on the base material consisting of one or more compounds comprising Si, C, B, O.sub.2 and having a thickness between 20 and 150 .mu.m;e) a central protective layer that is situated above the lower protective layer consisting of a transition metal boride and a transition metal silicide in combination with SiC, SiO.sub.2, or SiOC, and having a thickness of from 50 to 250 .mu.m; andf) an upper protective layer that is situated above the central protective layer consisting of one or more compounds comprising SiC, SiO.sub.2, MoSi.sub.2, Mo.sub.3 Si, Mo.sub.5 Si.sub.3, ZrB, ZrB.sub.2, ZrB.sub.12, Si.sub.3 N.sub.4, ZrO.sub.2, Y.sub.2 O.sub.3, Al.sub.2 O.sub.3, mixed oxides Al.sub.2 O.sub.3 --SiO.sub.2, and SiOC and having a thickness of from 20 to 250 .mu.m.
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