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通过在铜基体中添加V0.97W0.03O2制备了具有相变效应的Cu/V0.97W0.03O2复合材料,研究了添加相V0.97W0.03O2相变以及在Cu基体中的弥散程度对Cu/V0.97W0.03O2复合材料电导率的影响。采用场发射扫描电镜表征复合材料组织特征,利用X-ray衍射分析复合材料物相组成,并利用电导率测量系统检测不同温度下Cu/V0.97W0.03O2复合材料的电导率。结果表明,随高能球磨时间增加,铜基体中V0.97W0.03O2颗粒粒径越小,分布越弥散,对Cu/V0.97W0.03O2复合材料的电导率影响越明显。铜基体中的添加相V0.97W0.03O2会在0℃附近发生相变,导致Cu/V0.97W0.03O2复合材料相变前后的电导率变化幅度由5.41%升高到26.88%,相变效应增加明显。
The Cu / V0.97W0.03O2 composite with phase transition effect was prepared by adding V0.97W0.03O2 into copper matrix. The phase transformation of V0.97W0.03O2 and the degree of dispersion in Cu matrix were investigated. Effect of V0.97W0.03O2 Composite Conductivity. The microstructure of the composites was characterized by field emission scanning electron microscopy. The phase composition of the composites was analyzed by X-ray diffraction. The conductivity of Cu / V0.97W0.03O2 composites at different temperatures was measured by conductivity measurement system. The results show that with the increase of high-energy ball milling time, the smaller the particle size of V0.97W0.03O2 particles in the copper matrix, the more dispersed the particles and the more obvious the influence on the electrical conductivity of the Cu / V0.97W0.03O2 composite. The phase V0.97W0.03O2 in the copper matrix will undergo phase transformation near 0 ℃, the conductivity of Cu / V0.97W0.03O2 composites increases from 5.41% to 26.88% before phase transformation, and the phase transformation effect Increase significantly.