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采用粉末冶金方法制备高强高导铜合金基纳米复合材料(CuZr/AlN)。采用光学显微镜(OM)和高分辨率透射电镜(HRTEM)等方法研究不同烧结工艺对复合材料组织与性能的影响,研究固溶时效对CuZr/AlN力学性能的影响。结果表明:试样的组织致密,晶粒大小在0.2μm左右;试样的布氏硬度随着复压制压力和烧结温度的升高而升高;试样的布氏硬度开始随着锆含量的增加而升高,但当锆颗粒含量大于0.5%时,复合材料的布氏硬度开始降低。试样的抗弯强度随着复压制压力和烧结温度的升高而提高,抗弯强度在锆含量为在0.5%时最大。900°C固溶后的布氏硬度比固溶前的布氏硬度低,试样在500°C和600°C时效后,布氏硬度增加,在700°C发生过时效现象。
High-strength and high-conductivity copper-alloy based nanocomposites (CuZr / AlN) were prepared by powder metallurgy. The effects of different sintering processes on the microstructure and properties of the composites were investigated by optical microscope (OM) and high-resolution transmission electron microscopy (HRTEM) to study the effect of solution-aging on the mechanical properties of CuZr / AlN. The results show that the microstructure of the sample is dense and the grain size is about 0.2μm. The Brinell hardness increases with the increase of recombining pressure and sintering temperature. The Brinell hardness of the sample begins to increase with the increase of Zr content Increase but increase, but when the content of zirconium particles is greater than 0.5%, the Brinell hardness of the composite began to decrease. The flexural strength of the samples increases with the increase of the recompression pressure and the sintering temperature, and the flexural strength is the largest when the zirconium content is 0.5%. Brinell hardness after solution treatment at 900 ° C is lower than Brinell hardness before solution treatment. Brinell hardness increases after aging at 500 ° C and 600 ° C and overaging occurs at 700 ° C.