Silicon carbide whisker-zirconia reinforced mullite and alumina ceramics

Patent · Wed Dec 31 23:00:00 EST 1986

OSTI ID:866216

Becher, Paul F ^[1]; Tiegs, Terry N ^[2]

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1. Oak Ridge, TN
2. Lenoir City, TN

The flexural strength and/or fracture toughness of SiC whisker-reinforced composites utilizing mullite or alumina as the matrix material for the composite are increased by the addition of zirconia in a monoclinic or tetragonal phase to the matrix. The zirconia addition also provides for a lower hot-pressing temperature and increases the flexural strength and/or fracture toughness of the SiC whisker-reinforced composites over SiC whisker-reinforced composites of the similar matrix materials reinforced with similar concentrations of SiC whiskers.

• Research Organization: LOCKHEED MARTIN ENRGY SYST INC
• DOE Contract Number: AC05-84OR21400
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4657877
• OSTI ID: 866216
• Country of Publication: United States
• Language: English

Related Subjects

/501/264/
addition
alumina
alumina ceramic
carbide
carbide whisker
ceramics
composite
composites
concentrations
flexural
flexural strength
fracture
fracture toughness
hot-pressing
increased
increases
material
materials
matrix
matrix material
matrix materials
monoclinic
mullite
phase
provides
reinforced
reinforced composite
reinforced composites
sic
sic whisker-reinforced
sic whiskers
silicon
silicon carbide
similar
similar concentration
strength
temperature
tetragonal
tetragonal phase
toughness
utilizing
whisker-reinforced
whisker-zirconia
whiskers
zirconia