SiC whisker reinforced Al/sub 2/O/sub 3/-ZrO/sub 2/ composites

Conference · Mon Aug 01 04:00:00 EDT 1988 · Ceram. Eng. Sci. Proc.; (United States)

OSTI ID:6480037

Exner, E L; Jun, C K; Moravansky, L L

During machining, SiC whisker-reinforced alumina-zirconia ceramics used in superalloy-cutting tools fail in one or more of the following forms: cutting-edge wear, notching at the depth-of-cut line, chippage, or breakage. Attention is presently given to the combined effects on such tool ceramics of variations in the proportions of their alumina, zirconia, and SiC whisker constituents. SiC portions of 0-45 vol pct were tested in matrices of alumina with 0-30 vol pct zirconia. Fracture toughness was improved by both SiC and zirconia additions, although zirconia additions yielded lower hardness.

• OSTI ID: 6480037
• Report Number(s): CONF-880118-
• Conference Information: Journal Name: Ceram. Eng. Sci. Proc.; (United States) Journal Volume: 9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CRYSTALS
FRACTURE PROPERTIES
HARDNESS
MATERIALS
MECHANICAL PROPERTIES
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
POROSITY
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WHISKERS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES