Theoretical and experimental analysis of Al2O3/Al-Si composites processed from Al-Si-Zn and Al-Si-Mg by direct metal oxidation

Conference · Sat Aug 01 00:00:00 EDT 1992 · Ceramic Engineering and Science Proceedings; (United States)

OSTI ID:7291761

Khatri, S C; Koczak, M J; Chou, Tongshik; Kagawa, Yutaka

Directed oxidation is an innovative technique for the production of ceramic/metal composites via the exposure of melts to oxidizing atmospheres at elevated temperatures. The resulting material consists of a 3D-interconnected, interpenetrating network of the oxide and metal-alloy microchannels. Experimental and theoretical attention is presently given to the case of alumina/Al-Si alloy composites of this type, where the Si content of the Al alloy varied (2, 5, and 10 wt pct). The composite's growth rates increased with increasing oxygen partial pressure for alloys with lower Si content. The higher growth rates and/or processing times led to higher porosity due to the coalescence of alumina grains. 9 refs.

• OSTI ID: 7291761
• Report Number(s): CONF-920144-; CODEN: CESPD
• Journal Information: Ceramic Engineering and Science Proceedings; (United States), Vol. 13:7-8; Conference: 16. annual conference on composites, materials, and structures, Cocoa Beach, FL (United States), 13-16 Jan 1992; ISSN 0196-6219
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
OXIDATION
ALUMINIUM OXIDES
MICROSTRUCTURE
COMPOSITE MATERIALS
CRYSTAL GROWTH
MAGNESIUM ALLOYS
SILICON ALLOYS
ZINC ALLOYS
CERMETS
FABRICATION
POROSITY
QUANTITY RATIO
ALLOYS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
MATERIALS
OXIDES
OXYGEN COMPOUNDS
400201* - Chemical & Physicochemical Properties
360602 - Other Materials- Structure & Phase Studies