Claims
- 1. A method for the combustion synthesis of .alpha.-silicon nitride comprising the steps of:
- dry mixing silicon powder with an alkali metal azide;
- introducing the mixture in a combustion chamber;
- pressurizing said chamber with nitrogen at a pressure in the range of about 50 to 100 atmospheres;
- igniting said mixture within said chamber; and
- isolating said .alpha.-silicon nitride formed.
- 2. The method of claim 1, additionally including the step of cold pressing said mixture prior to introducing it in said chamber.
- 3. The method of claim 2, wherein a pellet of Ti.sub.1.5 B is placed on said cold pressed mixture prior to introducing said mixture in said chamber.
- 4. The method of claim 1, wherein said mixture is molded prior to introducing it in said chamber.
- 5. The method of claim 1, wherein said silicon and said azide are mixed in a ratio of about 9:4.
- 6. The method of claim 5, wherein said azide is sodium azide.
Parent Case Info
This application is a continuation-in part of our patent application Ser. No. 933,438 now abandoned filed Nov. 21, 1986.
US Referenced Citations (3)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
933438 |
Nov 1986 |
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