SECOND PHASES OF RAPIDLY SOLIDIFIED AlFeCrZrVSi ALLOY AND THEIR THERMAL STABILITIES

来源期刊：中南大学学报(英文版)1998年第1期

论文作者：Xiao Yude Li Songrui Zeng Zhihua Li Wenxian Ma Zhengqing

文章页码：24 - 27

Key words：aluminum alloy; rapid solidification; thermal stability

Abstract: The rapidly solidified powder of AlFeCrZrVSi aluminum alloy was prepared using multi-stage atomization and consolidated by hot-extrusion, the evolution of microstructure of the extruded materials during thermal exposure was studied with optical microscope, X-ray diffraction and transmission electron microscope(TEM). The results show that the majority of dispersions present in the as-extruded alloy are metastable Al₁₂(Fe, Cr, V)₃Si, which has excellent thermal-dynamical stability and coarsening resistance; the coarsening rate-controlling process of the Al₁₂(Fe, Cr, V)₃Si phase is considered to be diffusion of Fe atom along grain boundaries instead of bulk diffusion of Fe atom.