Friction and Wear of Alumina Particles Dispersion Aluminum Alloy Composite Castings and Steel Pair

• Published in: THE JOURNAL OF THE JAPAN FOUNDRYMEN'S SOCIETY Vol. 67; no. 11; pp. 788 - 793
• Main Authors: Tsujikawa, Masato, Tominaga, Tadamochi, Hino, Makoto, Kawamoto, Makoto
• Format: Journal Article
• Language: Japanese
• Published: Japan Foundry Engineering Society 25.11.1995
• ISSN: 0021-4396; 2186-0335
• DOI: 10.11279/imono.67.11_788

Wear characteristics of metallic materials can be greatly improved by the dispersion of ceramics particles. The relation of dispersed particles fraction and wear is still not clear but this subject is of close relation to the friction and wear mechanism of hard particles dispersion composites. In this study, alumina particles dispersion aluminum alloy composite castings were made by the vortex method and investigated by a pin on disc tribo-tester under dry condition. It was found that at all sliding speeds (from 0.1 m/s to 3.0 m/s), wear rates of the composite pin specimens and mated steel discs increased as the fraction of dispersed particles increased. The investigation of sliding surface and wear debris clarified the steps to the wear mechanism of composites. These are, the fracture of alumina particles at sliding surface, stacking of debris on the composite surface and falling off of stacked layer. The increase in particles fraction increases the frequency of particles fracture and causes the stacking layer to become thick and easy to peel off.