Sliding wear of Al{sub 2}O{sub 3}-SiC-(Al,Si) composites against a steel counterface
- Indian Inst. of Science, Bangalore (India)
The sliding-wear behavior of Al{sub 2}O{sub 3}-SiC-Al composites prepared by melt oxidation against a steel counterface has been recorded in a pin-on-disk machine. At high speeds and pressures (10 m/s, 20 MPa), friction and wear appear to be principally controlled by the in-situ formation of an interfacial film that consists of a layer of Fe{sub 3}O{sub 4}. The formation of this film is examined as a function of sliding speed, lubrication, and composite microstructure. A model is proposed in which high surface temperatures cause the preferential extrusion of aluminum from the composite onto the pin/disk interface. This promotes the adhesive pickup of iron and its oxidation to form a stable tribologically beneficial layer of Fe{sub 3}O{sub 4}.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 455173
- Journal Information:
- Journal of the American Ceramic Society, Vol. 80, Issue 1; Other Information: PBD: Jan 1997
- Country of Publication:
- United States
- Language:
- English
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