Stock material or miscellaneous articles – Composite – Of silicon containing
Patent
1984-09-28
1986-07-01
Pertilla, Theodore E.
Stock material or miscellaneous articles
Composite
Of silicon containing
427249, 427255, 4272551, 428450, 428698, B32B 904
Patent
active
045980241
ABSTRACT:
Ceramic composites exhibiting increased fracture toughness are produced by the simultaneous codeposition of silicon carbide and titanium disilicide by chemical vapor deposition. A mixture of hydrogen, methyltrichlorosilane and titanium tetrachloride is introduced into a furnace containing a substrate such as graphite or silicon carbide. The thermal decomposition of the methyltrichlorosilane provides a silicon carbide matrix phase and the decomposition of the titanium tetrachloride provides a uniformly dispersed second phase of the intermetallic titanium disilicide within the matrix phase. The fracture toughness of the ceramic composite is in the range of about 6.5 to 7.0 MPa.sqroot.m which represents a significant increase over that of silicon carbide.
REFERENCES:
patent: 4039997 (1977-08-01), Huang et al.
Lackey Walter J.
Lauf Robert J.
Stinton David P.
Hamel Stephen D.
Hightower Judson R.
Larcher Earl L.
Pertilla Theodore E.
The United States of America as represented by the United States
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