The preparation, characterization and use of boron containing preceramic polymers as precursors to sintered silicon carbide
- Dow Corning Corporation, Midland, MI (United States)
Preceramic polysilazanes and siloxanes containing specific levels of boron and alkyl groups have been prepared. These polymers, upon pyrolysis convert into silicon carbide with controllable amounts of boron and carbon. The addition of both carbon and boron is necessary to sinter SiC powders to high densities. The chemical incorporation of these elements in polymeric binders eliminates the need for boron and carbon powder additions to silicon carbide powders. By employing these preceramic polymers the resulting ceramic can be sintered at lower levels of boron which affords higher bend strengths can be sintered at lower levels of boron which affords higher bend strengths than those prepared by traditional processing. The chemistry of the polymer synthesis along with a discussion of some of the sintering experiments will be presented.
- OSTI ID:
- 141697
- Report Number(s):
- CONF-930304-; TRN: 93:003688-1379
- Resource Relation:
- Conference: 205. American Chemical Society national meeting, Denver, CO (United States), 28 Mar - 2 Apr 1993; Other Information: PBD: 1993; Related Information: Is Part Of 205th ACS national meeting; PB: 1951 p.
- Country of Publication:
- United States
- Language:
- English
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