Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1978-10-16
1980-02-05
Poer, James
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 735, C04B 3552, C04B 3558
Patent
active
041871162
ABSTRACT:
A densified silicon nitride-silicon carbide composite material formed by hot-pressing a mixture of silicon nitride (Si.sub.3 N.sub.4) powder, which forms the matrix up to 40 volume percent and preferably from 5-30 volume percent silicon carbide (SiC) powder, and a densification aid such as magnesium oxide (MgO). The average size of the silicon carbide particles is to be less than about 5 microns. The densified composite material is characterized by higher thermal conductivity and strength at high temperatures relative to silicon nitride. The flexural strength at 1400.degree. C. of the composite material being at least double that of sintered silicon nitride.
REFERENCES:
patent: 3151994 (1964-10-01), Adlassnig
patent: 3468992 (1969-09-01), Lubatti et al.
patent: 4071372 (1978-01-01), Bird
Poer James
Stoltz R. A.
Westinghouse Electric Corp.
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