ROOM-TEMPERATURE WEAR CHARACTERISTICS OF AL2O3-PARTICLE-REINFORCED ALUMINUM-ALLOY COMPOSITE

[摘要] Room temperature dry wear and friction properties of a metal matrix composite sliding against cast iron have been studied in a pin-on-plate reciprocating wear tester. The composite consists of Al2O3 particles in an aluminum alloy matrix. Wear is caused by abrasion, interfacial adhesion and ploughing of the softer surface with the asperities of the harder surface and the debris. With increasing load the friction coefficient and wear initially increase and then decrease. The decreases in wear and friction are caused by increased hardness resulting from re-embedding of the fractured Al2O3 particles near the surface of the composite plate at high loads. The wear characteristics of the composite have been studied over the range of normal stress from 0.31 to 4.72 MPa.

[发布日期] 1991-11-15