Preparation of Al–La master alloy by ultrasonic method and modification on Al alloy  

作　　者：Hong Yan Xian-Chen Song Xin Huang 

机构地区：[1]Department of Materials Processing Engineering,School of Mechanical and Electrical Engineering,Nanchang University

出　　处：《Rare Metals》2015年第7期457-462,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51165032);the Innovative Group of Science and Technology of College of Jiangxi Province (No. 00008713);the Jiangxi Province Education Commission Foundation (No. GJJ13203)

摘　　要：In this study, two kinds of Al–La master alloys were prepared by ultrasonic method and ordinary mixmelting method, and both of the alloys were added into the Al alloy.Then, the microstructure of Al–La master alloy and the modification effect on the Al alloy were investigated using optical microscope(OM), X-ray diffraction(XRD), scanning electron microscope(SEM), and energy disperse spectroscopy(EDS).The results show that because of ultrasonic cavitation and streaming, the grain size of Al–La master alloy prepared by the ultrasonic method is refined, which distributes evenly.And, there is no gas hole,inclusion, or segregation in the Al–La master alloy with aAl, La, and La3Al11.Furthermore, Al–La master alloys show a nice modification for Al alloy, which is much better than that prepared by ordinary mix-melting method.In this study, two kinds of Al–La master alloys were prepared by ultrasonic method and ordinary mixmelting method, and both of the alloys were added into the Al alloy.Then, the microstructure of Al–La master alloy and the modification effect on the Al alloy were investigated using optical microscope(OM), X-ray diffraction(XRD), scanning electron microscope(SEM), and energy disperse spectroscopy(EDS).The results show that because of ultrasonic cavitation and streaming, the grain size of Al–La master alloy prepared by the ultrasonic method is refined, which distributes evenly.And, there is no gas hole,inclusion, or segregation in the Al–La master alloy with aAl, La, and La3Al11.Furthermore, Al–La master alloys show a nice modification for Al alloy, which is much better than that prepared by ordinary mix-melting method.

关 键 词：Rare earth La Master alloy Al alloy ULTRASONIC 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG290[金属学及工艺—金属材料]