Silicon carbide whisker reinforced ceramic composites and method for making same
Abstract
The present invention is directed to the fabrication of ceramic composites which possess improved mechanical properties especially increased fracture toughness. In the formation of these ceramic composites, the single crystal SiC whiskers are mixed with fine ceramic powders of a ceramic material such as Al{sub 2}O{sub 3}, mullite, or B{sub 4}C. The mixtures which contain a homogeneous dispersion of the SiC whiskers are hot pressed at pressures in a range of about 28 to 70 MPa and temperatures in the range of about 1,600 to 1,950 C with pressing times varying from about 0.75 to 2.5 hours. The resulting ceramic composites show an increase in fracture toughness which represents as much as a two-fold increase over that of the matrix material.
- Inventors:
- Issue Date:
- Research Org.:
- Union Carbide Corporation
- OSTI Identifier:
- 27688
- Patent Number(s):
- 32843
- Application Number:
- PAN: 6-847,961
- Assignee:
- Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Patent
- Resource Relation:
- Other Information: DN: Reissue of US Pat. No. 4,543,345, which was issued Sep. 24, 1985; PBD: 24 Jan 1989
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; COMPOSITE MATERIALS; FABRICATION; FRACTURE PROPERTIES; SILICON CARBIDES; ALUMINIUM OXIDES; MULLITE; BORON CARBIDES
Citation Formats
Wei, G C. Silicon carbide whisker reinforced ceramic composites and method for making same. United States: N. p., 1989.
Web.
Wei, G C. Silicon carbide whisker reinforced ceramic composites and method for making same. United States.
Wei, G C. Tue .
"Silicon carbide whisker reinforced ceramic composites and method for making same". United States.
@article{osti_27688,
title = {Silicon carbide whisker reinforced ceramic composites and method for making same},
author = {Wei, G C},
abstractNote = {The present invention is directed to the fabrication of ceramic composites which possess improved mechanical properties especially increased fracture toughness. In the formation of these ceramic composites, the single crystal SiC whiskers are mixed with fine ceramic powders of a ceramic material such as Al{sub 2}O{sub 3}, mullite, or B{sub 4}C. The mixtures which contain a homogeneous dispersion of the SiC whiskers are hot pressed at pressures in a range of about 28 to 70 MPa and temperatures in the range of about 1,600 to 1,950 C with pressing times varying from about 0.75 to 2.5 hours. The resulting ceramic composites show an increase in fracture toughness which represents as much as a two-fold increase over that of the matrix material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 24 00:00:00 EST 1989},
month = {Tue Jan 24 00:00:00 EST 1989}
}