【摘要】 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%。更多还原

【Abstract】 The effects of high temperature of 1-5 GPa and high pressure of 720 ℃ treatment on thermal diffusion coefficient and resistivity of as-cast Cu-38. 13Zn-0. 21 Al alloy were measured by thermal constant tester and seebeck resistivity tester. The microstructure of Cu-38. 13Zn-0. 21 Al alloy before and after high temperature and higher pressure heat treatment was observed by optical microscope and transmission electronic microscope. The experimental results show that after high temperature and high pressure treatment,the structure of Cu-38. 13Zn-0. 21 Al alloy is refined obviously and the dislocation density within grains increases,which leads to the decrease of thermal diffusion coefficient and the increase of resistivity. When the pressure is 3 GPa,the thermal diffusion coefficient reaches minimum value of0. 3024 cm2·s- 1,and the resistivity reaches maximum value of 7. 657 × 10- 8Ω·m- 1, the thermal diffusion coefficient decreases by14. 79%,and the resistivity inecreases by 7. 48% compared with the as-cast alloy.更多还原