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Title: Dispersion toughened ceramic composites and method for making same

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..sqrt..m which represents a significant increase over that of silicon carbide.

Inventors:
; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
5718384
Application Number:
ON: DE85011601
Assignee:
Dept. of Energy
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; CHEMICAL VAPOR DEPOSITION; FRACTURE PROPERTIES; PRODUCTION; SILICON CARBIDES; DISPERSION HARDENING; TITANIUM SILICIDES; CERAMICS; CARBIDES; CARBON COMPOUNDS; CHEMICAL COATING; DEPOSITION; HARDENING; MATERIALS; MECHANICAL PROPERTIES; SILICIDES; SILICON COMPOUNDS; SURFACE COATING; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360301* - Composite Materials- Preparation & Fabrication- (-1987)

Citation Formats

Stinton, D P, Lackey, W J, and Lauf, R J. Dispersion toughened ceramic composites and method for making same. United States: N. p., 1984. Web.
Stinton, D P, Lackey, W J, & Lauf, R J. Dispersion toughened ceramic composites and method for making same. United States.
Stinton, D P, Lackey, W J, and Lauf, R J. Fri . "Dispersion toughened ceramic composites and method for making same". United States.
@article{osti_5718384,
title = {Dispersion toughened ceramic composites and method for making same},
author = {Stinton, D P and Lackey, W J and Lauf, R J},
abstractNote = {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..sqrt..m which represents a significant increase over that of silicon carbide.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {9}
}