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《Development and Application of Materials》 2004-03
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Tensile Behavior of Al_2O_3 Dispersive Strengthened Copper-based Composite at Elevated Temperature

HAN Sheng-li~(1)),TIAN Bao-hong~(1)),SONG Ke-xing~(1)),LIU Ping~(1)), DONG Qi-ming~(1)),LIU Yong~(1)), CAO Xian-jie~(2)),NIU Li-ye~(2)) (1.Henan University of S&T, Luoyang 471003, China; 2.Luoyang Copper Work Group Ltd., Luoyang 471003, China)  
The Al_2O_3 particulates reinforced copper-based composites with high strength and high conductivity at ambient temperature have great potential applications in electrical industry and resistance welding industry. A novel Al_2O_3 particulates reinforced copper-based composite is fabricated by means of internal oxidation method. The microstructure of the composite is investigated under transmission electron microscope (TEM) and scanning electron microscope (SEM). The tensile strength and plasticity of the composite are determined at the temperature range of 25~1000℃. Results show that the Al_2O_3/Cu composite presents excellent high yield strength and high fracture strength at elevated temperature. The yield strength reaches 154MPa at 600℃.Brittle fracture occurs at elevated temperature with contrast to the ductile fracture at ambient temperature. The brittle fracture mechanism is discussed in brief.
【Fund】: 河南省重大科技攻关项目(0122021300);; 河南科技大学基金项目(2002QN03)资助。
【CateGory Index】: TB331
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