Effect of zirconia mixing route on densification of alumina reinforced with silicon carbide whiskers

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:530690

Kim, Duk-Jun; Bae, Byeong-Soo ^[1]; Kim, Hwan ^[2]

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1. Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)
2. Seoul National Univ. (Korea, Republic of)

Three different composite powders were prepared by mechanical mixing of SiC whiskers in Al{sub 2}O{sub 3} particles, ZrO{sub 2} coated SiC whiskers in Al{sub 2}O{sub 3} particles, and SiC whiskers in Al{sub 2}O{sub 3} particles coated with ZrO{sub 2}. High temperature aging of the aqueous solutions of zirconium sulfate containing Al{sub 2}O{sub 3} particles or SiC whiskers in the presence of urea was carried out for ZrO{sub 2} coating. Hot pressing was conducted to obtain fully densified Al{sub 2}O{sub 3} matrix composites. The densification characteristics of the composite powders were improved by the ZrO{sub 2} coating. The composite powder containing SiC whiskers coated with ZrO{sub 2} was excellent in densification compared to the composite powder containing Al{sub 2}O{sub 3} particles coated with ZrO{sub 2}.

• OSTI ID: 530690
• Report Number(s): CONF-9604124--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
COATINGS
DENSITY
HOT PRESSING
REINFORCED MATERIALS
SILICON CARBIDES
WHISKERS
ZIRCONIUM OXIDES