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On the Phase Transformation of Bulk as-Cast Ti40Zr40Ni20 Quasicrystal
Clc Number:

TG131 TG146.4

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    Abstract:

    A pure quasicrystal with the composition Ti40Zr40Ni20 was obtained in bulk form by using conventional suction-casting. The quasi-lattice constant of the icosahedral phase (I-phase) is 0.523 nm. Differential scanning calorimetry (DSC) together with X-ray diffraction were used to study the temperature-induced phase transformation of the as-cast I-phase. Two endothermic reactions are identified in the DSC trace. The first endothermic reaction with an onset temperature of 964 K corresponds to eutectoid transformation from the I-phase to the C14-type Laves phase and -Zr(Ti) solid solution. The second one with an onset temperature of 1 107 K indicates the melting transformation of the eutectoid mixture.

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[Qiang Jianbing, Wang Yingmin, Wang Dehe, Dong Chuang. On the Phase Transformation of Bulk as-Cast Ti40Zr40Ni20 Quasicrystal[J]. Rare Metal Materials and Engineering,2004,33(9):949~952.]
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  • Revised:March 01,2003