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对铸态Cu-38.13Zn-0.21Al合金进行1~5 GPa,720℃保温20 min的高温高压处理,采用热常数测试仪和赛贝克电阻率测试仪测试了高温高压处理前后Cu-38.13Zn-0.21Al合金的热扩散系数及电阻率,用光学显微镜和透射电子显微镜对其微观组织进行观察,并根据实验结果探讨了高温高压处理对Cu-38.13Zn-0.21Al合金热扩散系数及电阻率的影响。结果表明:高温高压处理能细化合金组织及增大组织内位错密度,使其热扩散系数降低和电阻率升高,在1~5 GPa范围内,压力为3 GPa时,热扩散系数达到最低值,为0.3024 cm2·s-1,较铸态样品的值降低了14.79%,而电阻率达到最高值,为7.657×10-8Ω·m-1,较铸态样品的值增大了7.48%。
The as-cast Cu-38.13Zn-0.21Al alloy was treated with high temperature and high pressure for 1 ~ 5 GPa and 720 ℃ for 20 min. The thermal conductivity of Cu-38.13Zn-0.21Al alloy was measured by using the thermal constant tester and the Sebeck resistivity tester. The thermal diffusivity and resistivity of Cu-38.13Zn-0.21Al alloy were observed by optical microscope and transmission electron microscope. The thermal diffusivities and resistivities of Cu-38.13Zn-0.21Al alloy were investigated based on the experimental results. influences. The results show that the high temperature and high pressure treatment can refine the alloy structure and increase the dislocation density in the tissue, resulting in lower thermal diffusivity and higher resistivity. When the pressure is 3 GPa in 1 ~ 5 GPa, the thermal diffusivity reaches The lowest value is 0.3024 cm2 · s-1, which is 14.79% lower than that of the as-cast sample and reaches the highest value of 7.657 × 10-8Ω · m-1, which is 7.48 higher than that of the as-cast sample %.