Effect of Mn and Cu on spheroidized process of Mg-Zn-Y-based icosahedral quasicrystal phase
In-situ spherical icosahedral quasicrystal phase (I-phase) was fabricated in Mg-Zn-Y-based alloys by metal mold casting route. The effects of Mn and/or Cu on spheroidized process, morphology and microhardness of primary I-phase were studied in this paper. The results showed that the solidified morphology of I-phase depended on the stability of spherical I-phase during the subsequent growth and critical radius Rr of the spherical I-phase. Only when actual radius smaller than critical radius Rr can spherical IQC be formed. The effects of the fourth component and degree of undercooling on Rr were studied for the first time. Amazing spherical minisize IQC had been produced by improving cooling rate using a water-cooled copper mold. Multicomponent spherical IQC is hopeful of being strengthening phase to novel metal composites.
Quasicrystal magnesium alloy morphology degree of undercooling
Zhifeng WANG Weimin ZHAO Xiaoping LIN Bo-Young HUR
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China I-Cube Center, ERI, School of Nano and Advanced Materials Engineering, Gyeongsang National Universit
国际会议
青岛
英文
1403-1406
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）