Silicon nitride/silicon carbide composite densified materials prepared using composite powders

Patent · Tue Jul 01 00:00:00 EDT 1997

OSTI ID:512432

Dunmead, S D; Weimer, A W; Carroll, D F; Eisman, G A; Cochran, G A; Susnitzky, D W; Beaman, D R; Nilsen, K J

Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• Assignee: Dow Chemical Co., Midland, MI (United States)
• Patent Number(s): US 5,643,843/A/
• Application Number: PAN: 8-678,199; CNN: Contract 86X-SK761C
• OSTI ID: 512432
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
POWDERS
SILICON CARBIDES
SILICON NITRIDES
SYNTHESIS