组织与性能
(合肥工业大学 材料学院，合肥 230009)
摘 要:
关键字: CuCrZr/AlN；纳米复合材料；粉末冶金；电导率
alloy based nano-AlN composite
（School of Materials and Engineering, Hefei University of Technology, Hefei 230009, China）
Abstract:The spot welding copper alloy based composite was prepared using PM method with high strength and high conductivity. The different preparing conditions such as pressure, sintering temperature, repressure and resintering temperature influences on microstructure and properties were also studied using TEM and SEM. The results show that the density increases with increasing pressure and sintering temperature and the buckling strength increases with increasing density. After repressure and resintering, the highest buckling strength reaches 417 MPa. The conductivities of the materials increase with increasing densities within certain range and reach 62%(IACS). The sintering temperatures are 950 and 900 ℃ and their grain sizes are 0.26−0.44 μm, 0.1−0.21 μm, respectively. Its softening temperature is bigger than 600 ℃.
Key words: CuCrZr/AlN; nano-composite; powder metallurgy; conductivity
