Dispersion toughened ceramic composites and method for making same

Patent · Wed Jan 01 04:00:00 EST 1986

OSTI ID:865906

Stinton, David P ^[1]; Lackey, Walter J ^[2]; Lauf, Robert J ^[2]

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1. Knoxville, TN
2. Oak Ridge, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4598024
• OSTI ID: 865906
• Country of Publication: United States
• Language: English

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carbide
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disilicide
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silicon
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titanium
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