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 Al2O3, mullite, or B4C. The mixtures which contain a homogeneous disperson 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 1600° to 1950°C. with pressing times varying from about 0.75 to 2.5 hours. The resulting ceramic composites show an increase in fracture toughness of up to about 9 MP1/2 which represents as much as a two-fold increase over that of the matrix material.
- Inventors:
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1176688
- Patent Number(s):
- RE32843
- Application Number:
- 06/847,961; 4,543,345
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 1986 Apr 03
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Wei, George C. Silicon carbide whisker reinforced ceramic composites and method for making same. United States: N. p., 1989.
Web.
Wei, George C. Silicon carbide whisker reinforced ceramic composites and method for making same. United States.
Wei, George C. Tue .
"Silicon carbide whisker reinforced ceramic composites and method for making same". United States. https://www.osti.gov/servlets/purl/1176688.
@article{osti_1176688,
title = {Silicon carbide whisker reinforced ceramic composites and method for making same},
author = {Wei, George 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 Al2O3, mullite, or B4C. The mixtures which contain a homogeneous disperson 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 1600° to 1950°C. with pressing times varying from about 0.75 to 2.5 hours. The resulting ceramic composites show an increase in fracture toughness of up to about 9 MP1/2 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}
}
Works referenced in this record:
Silicon Nitride Ceramic Composites with High Toughness
journal, January 1971
- Lindley, M. W.; Godfrey, D. J.
- Nature, Vol. 229, Issue 5281
Silicon carbide yarn reinforced glass matrix composites
journal, April 1982
- Prewo, K. M.; Brennan, J. J.
- Journal of Materials Science, Vol. 17, Issue 4
High-strength silicon carbide fibre-reinforced glass-matrix composites
journal, February 1980
- Prewo, Karl M.; Brennan, John J.
- Journal of Materials Science, Vol. 15, Issue 2