摘要：根据Miedema半经验理论建立Co-Cu二元系机械合金化过程的热力学模型,讨论机械合金化法制备的Co-Cu(原子分数为20%)纳米晶过饱和固溶体的热力学和动力学特点。结果表明:采用机械合金化法可以获得Co-Cu纳米晶过饱和固溶体;热力学计算结果显示,Co-Cu二元系不具有形成固溶体的热力学驱动力,Co-Cu合金经机械合金化制备纳米晶过饱和固溶体的驱动力主要来源于动力学。

关键词：机械合金化；Co-Cu合金；纳米晶过饱和固溶体；热力学；动力学

Abstract： The thermo-dynamics model of Co-Cu binary system in mechanical alloying process was established based on Miedema semi-experimental theory. Thermo-dynamics and kinetics of Co-Cu nano-crystalline supersaturated solid solution prepared by mechanical alloying process were discussed . The results show that Co-Cu nano crystalline supersaturated solid solution is prepared by mechanical alloying. The thermo-dynamics calculation results indicate that there is no driving force to form solid solution in Co-Cu binary system. It means that driving force of Co-Cu nano-crystalline supersaturated solid solution prepared by mechanical alloying comes from dynamics. 

Keywords: mechanical alloying; Co-Cu alloy; nano- crystalline super - saturated solid solution; thermo-dynamics; kinetics