IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0862034
(1992-04-02)
|
|
발명자
/ 주소 |
- Luthra Krishan L. (Schenectady NY) Brun Milivoj K. (Ballston Lake NY) Corman Gregory S. (Ballston Lake NY)
|
| 출원인 / 주소 |
- General Electric Company (Schenectady NY 02)
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| 인용정보 |
피인용 횟수 :
22 인용 특허 :
0 |
초록
▼
A protective coating for a reinforcement phase exposed to molten silicon or silicon alloy infiltrant comprises, an inner layer material resistant to reaction with the molten infiltrant, an interlayer of a reactive material that reacts with the infiltrant to form compounds having a melting temperatur
A protective coating for a reinforcement phase exposed to molten silicon or silicon alloy infiltrant comprises, an inner layer material resistant to reaction with the molten infiltrant, an interlayer of a reactive material that reacts with the infiltrant to form compounds having a melting temperature greater than the infiltrant, and an outer layer material resistant to reaction with the molten infiltrant. Materials resistant to reaction with molten silicon are a metal carbide from the group consisting of carbides of titanium, hafnium, zirconium, and tantalum; a metal nitride from the group consisting of nitrides of boron, silicon, aluminum, titanium, zirconium, hafnium, niobium, and tantalum; a metal boride from the group consisting of borides of titanium, zirconium, hafnium, silicon, and aluminum, or combinations thereof. Another inner layer material resistant to reaction with molten silicon is a metal oxide that is an oxide of aluminum, yttrium, titanium, zirconium, hafnium, beryllium, silicon, lanthanum, scandium, or the rare earths. Another outer layer material is rhodium, iridium, metal that reacts with silicon to form a silicide, metal carbide, metal silicide, metal nitride, or metal boride. Suitable metal silicides are silicides of chromium, molybdenum, tantalum, titanium, tungsten, or zirconium. Materials reactive with the molten silicon are carbon, molybdenum, titanium, chromium, niobium, zirconium, iridium, and combinations thereof.
대표청구항
▼
A composite comprised of a reinforcement phase in a matrix of molten silicon infiltration formed silicon carbide, the reinforcement phase having a protective coating comprised of an inner layer on the reinforcement phase, an interlayer on the inner layer, and an outer layer on the interlayer, the in
A composite comprised of a reinforcement phase in a matrix of molten silicon infiltration formed silicon carbide, the reinforcement phase having a protective coating comprised of an inner layer on the reinforcement phase, an interlayer on the inner layer, and an outer layer on the interlayer, the inner and outer layer being materials resistant to reaction with molten silicon, and the interlayer being a molten silicon reactive material which forms compounds having a melting temperature higher than silicon.
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