| Mg74Zn25Y1三元合金中的准晶相 |
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| 引用本文： | 史菲,郭学锋,张忠明.Mg74Zn25Y1三元合金中的准晶相[J].机械工程学报,2003,39(8):138-140. |
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| 作者姓名： | 史菲 郭学锋 张忠明 |
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| 作者单位： | 西安理工大学材料科学与工程学院 |
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| 基金项目： | 国家自然科学基金(50271054)、陕西省自然科学基金(2002E110)和陕西省教育厅回国留学人员基金资助项目. |
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| 摘 要： | 旨在研究高镁、低锌和低钇合金中准晶的形成和分布，降低材料的密度，研究制备准晶增强自生复合材料的可行性。用金相显微镜和SEM分析低Zn和低Y含量下，Mg74Zn25Y1合金普通凝固组织；EDS分析合金和凝固组织中各相的成分；XRD分析凝固组织的相组成；TEM确定准晶的结构。研究结果表明，Mg74Zn25Y1合金的凝固组织为?-Mg+MgZn+Zn60Mg30Y10。其中，Zn60Mg30Y10准晶为五次对称的20面体结构，微观形貌呈现出完整五瓣花瓣和没有完全长大的五边形。准晶晶粒尺寸小于50 ?m。
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| 关 键 词： | 镁合金 凝固 准晶 |
| 修稿时间： | 2002年8月5日 |
STUDY ON THE QUASICRYTAL PHASE IN Mg74Zn25Y1 ALLOY |
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| Shi Fei Guo Xuefeng Zhang Zhongming.STUDY ON THE QUASICRYTAL PHASE IN Mg74Zn25Y1 ALLOY[J].Chinese Journal of Mechanical Engineering,2003,39(8):138-140. |
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| Authors: | Shi Fei Guo Xuefeng Zhang Zhongming |
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| Affiliation: | Xi’an University of Technology |
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| Abstract: | The formation and distribution of quasicrystal in as-cast Mg74Zn25Y1 alloy are investigated. On this base, the feasibility to prepare quasicrystal reinforced low-density magnesium alloy is also discussed. The microstructure of the as-cast Mg74Zn25Y1 alloy is analyzed by optical microscope and SEM, composition and phases are checked by EDS, the constituent phases are identified by XRD and quasicrystal structure is identified by TEM. Analyzing results show that the microstructures of the alloy consist of a-Mg, MgZn and Zn60Mg30Y10. Five-fold icosahedral quasicrytal Zn60Mg30Y10, which appears in five petal shape or in small pentagonal grains, is uniformly dispersed on the matrix with less than 50 mm grain size. |
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| Keywords: | Quasicrytal Magnesium alloy Solidification |
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