Method for processing metal-reinforced ceramic composites

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb06523.x· OSTI ID:7052117

Lange, F F; Velamakanni, B V; Evans, A G ^[1]

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1. California Univ., Santa Barbara, CA (USA)

A new process is developed to form a ceramic containing a three-dimensional network of metal reinforcement. The process involves four steps: forming a powder compact containing a continuous network of either organic or carbon material by pressure filtration, pyrolyzing the network to form channels within the powder compact, densifying the powder while retaining the channel network, and intruding metal into the channel network by squeeze casting. Pressure filtration is used to form the powder compact containing the pyrolyzable network either by mixing slurries of powder with chopped fiber or by packing powder within pyrolyzable preforms. When pressure is removed after filtration, the differential strain recovery of the powder matrix relative to the organic material can cause damage. Such damage is prevalent for a powder matrix formed from flocced slurries. However,this problem is avoided by using dispersed slurries which produce consolidated bodies that alleviate stresses arising from differential strain recovery by viscous flow. Metal-reinforced ceramic composites with different reinforcement architectures, volume fractions, and sizes can be produced with this technique.

• OSTI ID: 7052117
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:2; ISSN 0002-7820; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPOSITE MATERIALS
FABRICATION
MATERIALS
POWDERS
REINFORCED MATERIALS
SUPERCONDUCTING COMPOSITES