For the first time, petal-like and spherical Mg-based icosahedral quasicrystal phase (I-phase) were obtained by introducing Ti, Sb, Ce and C nanotubes into Mg-Zn-Y alloy under normal casting conditions. The formation mechanism and stability criterion of spherical I-phase were discussed. The morphology and microhardness of I-phase and their determinants were studied in this paper. The results show that the different value of microhardness of I-phase could be attributed to the different kinds of the fourth component and its content, and its different innate characters. The final morphology of icosahedral quasicrystalline (IQC) is decided by the size of critical stable radius Rr, the content of the fourth component and degree of undercooling.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | D.Shechtman, I.Blech, D.Gratias, J.W.Chan: Phys. Rev. Lett, 1984, 53, 1951. [2] An-Pang Tsai, Akihisa Inoue, Tsuyoshi Masumoto: Jpn. J. Appl. Phys. Part , 1987, 26, 1505.[3] G.V.S. Sastry, V.V. Rao, P. Ramachandrarao, T.R. Anantharaman: Scripta Metall, 1986, 20, 191.[4] U. Koester, W. Liu, H. Liebertz, M. Michel: J. Non-Cryst. Solids, 1993, 153, 446.[5] J.E. Shield, J.A. Campbell, D.J. Sordelet: J. Mater. Sci. Lett, 1997, 16, 2019.[6] Zhiping Luo, Shaoqing Zhang, Yali Tang, Dongshan Zhao: Scripta. Metall. Mater, 1993, 28, 1513.[7] Jinshan Zhang, Hongwei Du, Wei Liang, Chunxiang Xu, Binfeng Lu: J. Alloys Compd, 2007, 427, 244.[8] ZHANG Jin-shan, DU Hong-wei, LU Bin-feng, ZHANG Yan, LIANG Wei, XU Chun-xiang, LU Feng-lei: Trans. Nonferrous Met. SOC. China, 2007, 17, 273.[9]Wenlong Xiao, Jun Wang, Jie Yang, Shusheng Jia, Limin Wang: Mater. Sci. Eng., 2008, A485 , 55&ndash |
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