Reaction bonded silicon nitride

Details Reaction bonded silicon nitride Reaction bonded silicon nitride

1975-12-03

1978-11-28

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 66, C04B 3558

Patent

active

041276302

ABSTRACT:
A new form of reaction bonded silicon nitride is described along with the process of making this new product. The product is characterized by isotropic structure, extremely fine pore and grain size, high strength and a high ratio of alpha silicon nitride to beta silicon nitride. The product has a density of at least 2.45 grams/cc and is essentially free of pores greater than 15 microns.

REFERENCES:
patent: 2618565 (1952-11-01), Nicholsen
patent: 3778231 (1973-12-01), Taylor
High Temperature Properties of Reaction Bonded Silicon Nitride, M.E. Washburn et al., 6 pp. Nov. 1973.
Parr et al., Preparation, Micro-Structure, and Mechanical Properties of Silicon Nitride, Special Ceramics, pp. 102-135.
Fulrath et al., Ceramic Microstructure, pp. 852 and 264-265, 853 (1966).
Evans, A. G. et al., "The Strength and Oxidation of Reaction Sintered Silicon Nitride", Jour. of Materials Sci. 5 (1970) pp. 314-325.

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