| Effect of Ca on crystallization of Mg-based master alloy containing spherical quasicrystal |
| |
| 作者姓名： | 张金山 杜宏伟 卢斌峰 张焱 梁伟 许春香 陆风雷 |
| |
| 作者单位： | School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China |
| |
| 基金项目： | 国家自然科学基金;山西省自然科学基金 |
| |
| 摘 要： | Spherical icosahedral quasicrystalline phase （I-phase） was obtained by introducing Ca into Mg-Zn-Y alloy under conventional casting conditions. Due to the addition of Ca, Mg45Zn50Yn4.5Ca0.5 primary I-phase, which is thermodynamically stable and homogeneously distributed, was generated instead of decahedral quasicrystalline phase during the solidification process; the morphology of primary I-phase in the solidification microstructure changed from petal-like one （60-80 μm） to spherical one （≤ 15 μm）. When the mass fraction of Ca reaches 0.05%, sphericalI-phase with the largest quantity, highest spheroidization rate and highest circular degree can be obtained. Meanwhile, due to the changed morphology and the decreased size of primaryI-phase, the hardness of Mg-Zn-Y-Ca master alloy is reduced. The application of spherical I-phase as particulate reinforced phase provides great opporttmities for the improvement of strength and toughness of magnesium alloys.
|
| 关 键 词： | 钙 镁基中间合金 球形准晶 结晶化 |
| 收稿时间： | 2006-09-15 |
| 修稿时间： | 2007-01-10 |
Effect of Ca on crystallization of Mg-based master alloy containing spherical quasicrystal |
| |
| ZHANG Jin-shan,DU Hong-wei,LU Bin-feng,ZHANG Yan,LIANG Wei,XU Chun-xiang,LU Feng-lei.Effect of Ca on crystallization of Mg-based master alloy containing spherical quasicrystal[J].Transactions of Nonferrous Metals Society of China,2007,17(2):273-279. |
| |
| Authors: | ZHANG Jin-shan DU Hong-wei LU Bin-feng ZHANG Yan LIANG Wei XU Chun-xiang LU Feng-lei |
| |
| Affiliation: | School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China |
| |
| Abstract: | Spherical icosahedral quasicrystalline phase (I-phase) was obtained by introducing Ca into Mg-Zn-Y alloy under conventional casting conditions. Due to the addition of Ca, Mg45Zn50Y4.5Ca0.5 primary I-phase, which is thermodynamically stable and homogeneously distributed, was generated instead of decahedral quasicrystalline phase during the solidification process: the morphology of primary I-phase in the solidification microstructure changed from petal-like one (60–80 μm) to spherical one (≤ 15 μm). When the mass fraction of Ca reaches 0.05%, spherical I-phase with the largest quantity, highest spheroidization rate and highest circular degree can be obtained. Meanwhile, due to the changed morphology and the decreased size of primary I-phase, the hardness of Mg-Zn-Y-Ca master alloy is reduced. The application of spherical I-phase as particulate reinforced phase provides great opportunities for the improvement of strength and toughness of magnesium alloys. |
| |
| Keywords: | magnesium alloy Ca spherical quasicrystal crystallization microstructure |
| 本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录！ |
|
