Pressureless sintering of whisker-toughened ceramic composites

Patent · Fri Jan 01 04:00:00 EST 1993

OSTI ID:868766

Tiegs, Terry N ^[1]

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1. Lenoir City, TN

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.

• Research Organization: LOCKHEED MARTIN ENRGY SYST INC
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5207958
• OSTI ID: 868766
• Country of Publication: United States
• Language: English

Related Subjects

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10
20
94
aids
aspect
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average
ceramic
ceramic composite
ceramic composites
composites
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containing
densities
density
disclosed
improve
improved
method
permitting
pressureless
pressureless sintering
production
ratio
reducing
sic
sic whiskers
sintered
sintered density
sintering
sintering aids
sintering method
theoretical
theoretical density
toughened ceramic
vol
whisker-toughened
whisker-toughened ceramic
whiskers