Glass-forming ability and crystallization of Mg-Ni amorphous alloys with Y addition  

作　　者：Liu Liyan Teng Xinying Wang Yongjie Liu Teng 

机构地区：[1]Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China [2]Univ Jinan, Sch Phys & Technol, Jinan 250022, Peoples R China

出　　处：《Rare Metals》2012年第3期244-249,共6页稀有金属（英文版）

基　　金：supported by the Award Fund for Outstanding Young Scientist in Shandong Province, China (No. BS2011CL004)

摘　　要：Mg86.33Ni13.67-xYx(x=0, 1, 3, 6, 10) amorphous alloys were obtained by single-roller melt-spinning technique and the effect of Y addition on the glass forming ability(GFA), crystallization and micro-hardness of Mg-Ni alloys were studied. The results show that the GFA of Mg86.33Ni13.67-xYx(x=0, 1, 3, 6, 10) is improved successfully with the Y addition. The highest GFA appeares at x=6, while the reduced glass transition temperature (Trg) is 0.5225 and the supercooled liquid region(ΔTx) is 42.06 K; the position of the main diffraction halo is different for the alloys, and the maximum of the main diffraction halo of alloys with x=0, 1, 3 corresponds to the main peaks of a metastable fcc-Mg6Ni or fcc-Mg6Ni + Ni-Y intermetallic phases, and for the alloys with x=6, 10, it corresponds to Mg-Y and Ni-Y intermetallic phases; the micro-hardness of the alloys is improved with Y additions, and the highest micro-hardness is obtained at x=6 at.%, which is 960 MPa.

关 键 词：Mg-based amorphous alloy glass forming ability CRYSTALLIZATION micro-hardness 

分 类 号：TG1[金属学及工艺—金属学]