高强高导纳米复合材料Cu AlN的组织与力学性能研究（英文）

Structure and Mechanical Properties of Cu/AlN Nanocomposites with High Strength and High Conductivity

采用粉末冶金方法制备高强高导铜合金基纳米复合材料(Cu/AlN),用光学显微镜、TEM和SEM等方法研究不同工艺条件如温度、压力、复压压力及复烧温度对复合材料组织与性能的影响。结果表明:烧结后的试样密度随压力、烧结温度的升高而增大;试样布氏硬度随复压制压力和烧结温度的升高而升高;试样布氏硬度开始随着纳米AlN颗粒的含量增加而升高,但当纳米AlN颗粒质量分数大于0.5%时,复合材料的布氏硬度开始下降。试样的抗弯强度随复压制压力和烧结温度的升高而提高。

This study is aimed to adopt the powder metallurgy method to prepare copper alloy series （Cu/AlN） nanocomposites with high strength and high conductivity. Optical microscopy, transmission electron microscopy, and scanning electron microscopy were used to examine the effect of different process conditions （temperature, pressure, repressing pressure, and resintering temperature） on the structure and mechanical properties of the composites. The results show that the density of the sample increases with the increase of pressure and sintering temperature. The Brinell hardness of the sample increases with the increase of repressing pressure, sintering temperature and A1N nanoparticle content. However, when A1N nanoparticle content is 〉0.5 wt%, the Brinell hardness of the composites decreases. The bending strength of the sample increases with the increase of repressing pressure and sintering temperature.