Method of increasing the oxidation resistance of silicon nitride

Details Method of increasing the oxidation resistance of silicon nitride Method of increasing the oxidation resistance of silicon nitride

1975-02-12

1976-09-28

Lusignan, Michael R.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

106 55, 106 735, 264 66, 423344, 423406, 427 94, 427399, F27B 904, F27B 910

Patent

active

039831981

ABSTRACT:
A method of increasing the oxidation resistance of silicon nitride is disclosed. A furnace is preheated to a temperature in the range of 2500.degree.F to 2750.degree.F. The silicon nitride body to be treated is inserted into the preheated furnace. The silicon nitride article is maintained in the furance for a period of time sufficient to develop an oxidation resistant surface on the article. The period of time is generally in the range from one-half hour to five hours.

REFERENCES:
patent: 3222438 (1965-12-01), Parr et al.
patent: 3226194 (1965-12-01), Kuntz
Special Ceramics, British Ceramic Research Assn., 1960, pp. 120- 121.

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