(大连交通大学材料科学与工程学院， 大连 116028)
摘 要: 研究了Cu-11.5%Fe合金经固溶和时效处理后导电性的变化规律。 采用SEM和TEM观察了经不同规范热处理Cu-11.5%Fe合金的组织结构， 利用XRD测定了铜基体的晶格常数， 得出时效处理对合金电阻率的影响规律， 并探讨了合金电阻率变化的内在原因。 结果表明： 影响合金导电性的主要因素是溶质散射电阻、 析出应变场散射电阻； 固溶处理的合金经过550 ℃、 2 h时效处理， 可得到较低的电阻率。
关键字: Cu-11.5%Fe合金； 时效处理； 电阻率
（ School of Materials Science and Engineering,
Dalian Jiaotong University, Dalian 116028, China）
Abstract: The effect of aging treatment on conductivity of Cu-11.5%Fe alloys was studied. The microstructures of Cu-11.5%Fe alloys after different aging treatment were studied by transmission electron microscope (TEM) and scanning electron microscope(SEM). The lattice parameter of Cu matrix was measured by X-ray diffraction (XRD). The effect of aging on resistivity was obtained and the internal reason of resistivity change was discussed. The results show that the resistivity of Cu-Fe alloys are contributed mainly by the Fe impurity scattering and the scattering associated with strain fields of Fe precipitates. Cu-11.5%Fe alloys present favourite conductivity after aging at 550 ℃ for 2 h .
Key words: Cu-11.5%Fe alloys; aging; resistivity
