摘要
研究了稀土La对(Ag-Cu28)-25Sn-xLa合金微观结构的影响,并探讨了稀土La含量的变化在其凝固过程中的作用。采用高频感应加热熔炼,经水淬制得(Ag-Cu28)-25Sn-xLa合金。通过XRD,SEM,EDS等分析手段,研究了合金的物相组成、凝固组织及元素分布情况。研究结果表明:微量的稀土La足以改变(Ag-Cu28)-25Sn合金的凝固过程;La含量不大于0.5%时,合金的物相组成为Ag3Sn,Cu3Sn和Cu6Sn5相;当La含量不小于1.0%(质量分数)时,合金的物相组成为Ag3Sn和Cu3Sn;同时,随La含量的增加合金的凝固组织不断细化,且有利于Ag(Sn)固溶体初生相的析出。
Effects of La addition on the microstructure and solidification process of（Ag-Cu28）-25Sn alloys were simultaneously studied.After high frequency induction heating,the（Ag-Cu28）-25Sn-xLa alloys were prepared by water quenching.The phase compositions,solidification microstructures and distribution of elements of（Ag-Cu28）-25Sn alloys were analyzed by XRD,SEM and EDS.The result showed that rare earth La was added,the phase compositions of（Ag-Cu28）-25Sn alloy could be changed.When the addition of La was less than 0.5%（mass fraction）,the phase compositions of（Ag-Cu28）-25Sn alloys were Ag3Sn,Cu3Sn and Cu6Sn5.When the addition of La was more than 1.0%,the phase compositions of（Ag-Cu28）-25Sn alloys were Ag3Sn and Cu3Sn.Meanwhile,the primary phase of Ag（Sn） solid solution could be easily dissolved out,and the solidification structures of that could be refined.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2012年第3期385-389,共5页
Chinese Journal of Rare Metals
基金
西南科技大学博士基金项目(10zx7113)
