J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (1): 27-32.

• Nanomaterialsand Nanotechnology • Previous Articles     Next Articles

Effect of Titanium, Antimony, Cerium and Carbon Nanotubes on the Morphology and Microhardness of Mg-based Icosahedral Quasicrystal Phase

Zhifeng Wang, Weimin Zhao, Haipeng Li, Jian Ding, Yongyan Li, Chunyong Liang   

  1. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
  • Received:2008-07-30 Revised:2009-03-11 Online:2010-01-31 Published:2010-01-22
  • Contact: WANG Zhi-feng
  • Supported by:

    the Natural Science Fund of Hebei Province, China (No. E2008000045),
    Tianjin Municipal High-Tech SMEs Special Funds for Technical Innovation Project of China (09ZXCXGX14500) ,
    the Doctoral Science Foundation of Hebei University of Technology

Abstract:

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.

Key words: Quasicrystal, Magnesium alloy, Morphology, Microhardness