Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1977-01-03
1978-10-10
Douglas, Winston A.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
106 55, 106 735, C04B 3558, C04B 3564
Patent
active
041196899
ABSTRACT:
A particulate dispersion of silicon nitride and beryllium additive is formed into a green body and sintered at a temperature ranging from about 1900.degree. to about 2200.degree. C in a sintering atmosphere of nitrogen at superatmospheric pressure producing a sintered body with a density ranging from about 80 to about 100%.
REFERENCES:
patent: 3953221 (1976-04-01), Lange
patent: 3992497 (1976-11-01), Terwilliger et al.
patent: 4017319 (1977-04-01), Greskovich et al.
Mitomo; M., "Pressure Sintering of Si.sub.3 N.sub.4, " Journal of Materials Science 11(1976) 1103-1107.
Charles Richard J.
Giddings Robert A.
Greskovich Charles D.
Prochazka Svante
Bell Mark
Binkowski Jane M.
Cohen Joseph T.
Douglas Winston A.
General Electric Company
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