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采用热压烧结制备Cu/V_(0.97)W_(0.03)O_2复合材料。通过扫描电镜及能谱仪研究了该复合材料的组织形貌及成分组成,利用涡流电导仪测定不同V_(0.97)W_(0.03)O_2含量的复合材料变温电导率,利用阿基米德排水法测量Cu/V_(0.97)W_(0.03)O_2复合材料的密度,并采用硬度计测量Cu/V_(0.97)W_(0.03)O_2复合材料的硬度。结果表明:Cu/V_(0.97)W_(0.03)O_2复合材料在0℃附近有电导率突变现象的发生,并且随着V_(0.97)W_(0.03)O_2添加量的增加,该复合材料的电导率突变量也有所增加;热压烧结相较于无压烧结能够更好地提高Cu/V_(0.97)W_(0.03)O_2复合材料的致密度及电导率。另外,随着V_(0.97)W_(0.03)O_2添加量的增加,V_(0.97)W_(0.03)O_2在Cu基体中的分散度得到改善,该复合材料的致密度增加,并可达97.1%,同时,其硬度逐渐增加。
Cu / V_ (0.97) W_ (0.03) O_2 composites were prepared by hot pressing sintering. The morphology and composition of the composites were characterized by scanning electron microscopy and energy dispersive spectroscopy. The conductivity of the composites with V_ (0.97) W_ (0.03) O_2 was measured by eddy current conductivity meter. The density of Cu / V 0.97 W 0.03 O 2 composites was measured and the hardness of Cu / V 0.97 W 0.03 O 2 composites was measured with a durometer. The results show that the conductivity of Cu / V_ (0.97) W_ (0.03) O_2 composites changes abruptly at 0 ℃, and the conductivity of the composites increases with the increasing of V_ (0.97) W_ (0.03) O_2 The rate of abrupt change also increases. Compared with pressureless sintering, hot pressing sintering can improve the density and electrical conductivity of Cu / V_ (0.97) W_ (0.03) O_2 composites. In addition, the dispersion of V 0.97 W 0.03 O 2 in Cu matrix was improved with the increase of V 0.97 W 0.03 O 2, and the density of the composite increased to 97.1% At the same time, its hardness gradually increased.