| Ti40Zr40Ni20块体铸态准晶的相变研究 |
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| 引用本文： | 羌建兵 王英敏 王德和 董闯. Ti40Zr40Ni20块体铸态准晶的相变研究[J]. 稀有金属材料与工程, 2004, 33(9): 949-952 |
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| 作者姓名： | 羌建兵 王英敏 王德和 董闯 |
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| 作者单位： | 大连理工大学,三束表面改性国家重点实验室,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金委员会"国家自然科学基金"资助(50271012) |
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| 摘 要： | 用吸铸法制备出单相块体Ti40Zr40Ni20。其准点阵参数为aR=0．523nm。通过差示扫描量热法(DSC)和X射线衍射等手段研究了该铸态准晶合金在加热过程中的相变行为。结果表明,Ti40Zr40Ni20铸态准晶在964K温度以下稳定;在964K附近温度,准晶发生分解,形成由β-Zr(Ti)固溶体与C14相组成的两相混合组织;在1107K,该混合物发生熔化。
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| 关 键 词： | 相变 准晶 Ti-Zr-Ni合金 |
| 文章编号： | 1002-185X(2004)09-0949-04 |
| 修稿时间： | 2003-03-01 |
On the Phase Transformation of Bulk as-Cast Ti40Zr40Ni20 Quasicrystal |
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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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| Authors: | Qiang Jianbing Wang Yingmin Wang Dehe Dong Chuang |
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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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| Keywords: | phase transformation quasicrystal Ti-Zr-Ni alloy |
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