Friction And Abrasion Properties Of Nano-Al₂O₃ Particles Reinforced Copper Matrix Composites

For its good mechanical properties, excellent electrical and thermal conductivity, corrosion resistance and low price, copper matrix composite is widely used in modern industry. But by now, because of its hardness and wear resistance is not big, it can not be used in certain situation which has special requirement. It can most efficiently improve the hardness and wear resistance of copper matrix composite and still keep it's other goodness, that is add reinforce particle to copper matrix composite. Owing to the unique size-dependent chemical and physical properties, the study of nanostructured materials has been one of the most active areas. Nano-materials present great promises and opportunities for a new generation of materials. Copper matrix composites reinforced by Nano-Al₂O₃ can provide excellent performances such as high strength, high electric conductivity, anti high temperature creep and resistance to wear, which have abroad application foreground in the field of electrotechnics, electronics and information technology.In this paper, nano-Al₂O₃ particles reinforced copper matrix composite was obtained by Mechanical Alloying and Spark Plasma Sintering. Microstructure, hardness and sliding wear behavior of nano-Al₂O₃ particles reinforced copper matrix composites have been studied.After ball milling by Mechanical Alloying for 10 hours, the complex powder is broken up, the size of it is about 5-20um.The hardness was analyzed. It was found that nano-Al₂O₃ particles were evenly dispersed in the copper matrix. The composite hardness was...