Surface treatment of 312 ternary ceramic materials and products

Details Surface treatment of 312 ternary ceramic materials and products Surface treatment of 312 ternary ceramic materials and products

1999-07-09

2000-01-11

Bell, Janyce

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273762, 427377, 428688, 428696, 428702, 428704, B05D 302, B05D 304, B23B 900, B23B 1900, B23B 904

Patent

active

060133228

ABSTRACT:
A ceramic material is surface treated by contacting the surface of a 312 ternary ceramic material with a surface-modifying compound selected from carburization agents, silicidation agents, nitridation agents and boronization agents, at an elevated temperature of at least about 600.degree. C. for a period of time sufficient to provide a surface reaction layer of at least about one micron in thickness in the surface-treated material, preferably having a surface hardness in excess of about 6 GPa. A product made by the method of this invention is also disclosed having a surface hardness in excess of about 6 GPa, preferably at least about 10 GPa.

REFERENCES:
patent: 4465777 (1984-08-01), Shuford
patent: 4471023 (1984-09-01), Shuford
patent: 4961529 (1990-10-01), Gottselig et al.
patent: 5451365 (1995-09-01), Barsoum
Tong et al., Synthesis and High Temperature Properties of Ti.sub.3 SiC.sub.2 ISC Composite, J. Mater. Sci. 30:3087-3090, 1995 (no mo).
Barsoum et al., Synthesis and Characterization of a Remarkable Ceramic: Ti.sub.3 SiC.sub.2, J. Am. Ceram Soc:79(7)1953-56, 1996 (no mo).
Strife et al., Ceramic Coatings for Carbon-Carbon Composites, Cer. Bull. vol. 67 No. 2, 1988 (no mo).
Racqult et al., Solid-State Synthesis and Characterization of the Ternary Phase Ti.sub.3 SiC.sub.2, J. Mater. Sc. 29:3384-3392, 1994.

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