skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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 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.degree. to 1950.degree. 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 MP.am.sup.1/2 which represents as much as a two-fold increase over that of the matrix material.

Inventors:
Issue Date:
Research Org.:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176688
Patent Number(s):
RE32843
Application Number:
06/847,961
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) OSTI
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
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 Al.sub.2 O.sub.3, mullite, or B.sub.4 C. 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.degree. to 1950.degree. 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 MP.am.sup.1/2 which represents as much as a two-fold increase over that of the matrix material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Patent:

Save / Share: