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Title: Pressureless sintering of whiskered-toughened ceramic composites

A pressureless sintering method is disclosed for use in the production of whisker-toughened ceramic composites wherein the sintered density of composites containing up to about 20 vol. % SiC whiskers is improved by reducing the average aspect ratio of the whiskers to from about 10 to about 20. Sintering aids further improve the density, permitting the production of composites containing 20 vol. % SiC with sintered densities of 94% or better of theoretical density by a pressureless sintering method.
Inventors:
 [1]
  1. (Lenoir City, TN)
Issue Date:
OSTI Identifier:
869679
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5376600
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
pressureless; sintering; whiskered-toughened; ceramic; composites; method; disclosed; production; whisker-toughened; sintered; density; containing; 20; vol; sic; whiskers; improved; reducing; average; aspect; ratio; 10; aids; improve; permitting; densities; 94; theoretical; theoretical density; ceramic composites; ceramic composite; aspect ratio; pressureless sintering; composites containing; sic whiskers; whisker-toughened ceramic; sintering aids; sintering method; sintered density; toughened ceramic; /501/