Method for producing composite sintered body of silicon carbide

Details Method for producing composite sintered body of silicon carbide Method for producing composite sintered body of silicon carbide

1995-11-16

1998-07-28

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Producing silicon carbide containing product

264683, 264668, 501 89, 501 90, 501 92, C04B 35577, C04B 35596

Patent

active

057859221

ABSTRACT:
A composite sintered body of silicon carbide and silicon nitride having a nano-composite structure in which fine SiC particles are dispersed in Si.sub.3 N.sub.4 particles and grain boundaries and fine Si.sub.3 N.sub.4 particles are dispersed in SiC particles is produced by (a) adding at least one sintering aid, boron and carbon to a mixed powder of silicon carbide and silicon nitride to form a green body, the sintering aid being (i) Al.sub.2 O.sub.3 or AlN and/or (ii) at least one oxide of an element selected from Groups 3A and 4A of the Periodic Table, and (b) sintering the green body by HIP or by a high-temperature normal sintering method.

REFERENCES:
patent: 3833389 (1974-09-01), Komeya et sl.
patent: 4184882 (1980-01-01), Lange
patent: 4187116 (1980-02-01), Lange
patent: 4209474 (1980-06-01), Prochazka
patent: 4690790 (1987-09-01), Bates
patent: 4800182 (1989-01-01), Izaki
patent: 4826791 (1989-05-01), Mehrotra et al.
patent: 5244621 (1993-09-01), Wakai et al.
Abstract in English of JP 58-91070.
Article entitled "Densification, Microstrucutre and Properties of SiCN-Nanocomposites", Third Euro-Ceramics, V3 pp. 603-607 (1993) (Freenza Editrice) Communication.
Abstract of JP 2160669 (English).
Abstract of JP 58091070 (English).

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