| 熔盐电解制备Mg-Li-La合金(英文) |
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| 引用本文： | 张密林,曹鹏,韩伟,颜永得,陈丽军. 熔盐电解制备Mg-Li-La合金(英文)[J]. 中国有色金属学会会刊, 2012, 22(1): 16-22. DOI: 10.1016/S1003-6326(11)61133-3 |
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| 作者姓名： | 张密林 曹鹏 韩伟 颜永得 陈丽军 |
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| 作者单位： | 哈尔滨工程大学材料科学与化学工程学院超轻材料与表面技术教育部重点实验室 |
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| 基金项目： | Projects (2009AA050702, 2011AA03A409, 2007CB200906) supported by Hi-tech Research and Development Program of China;Projects (21103033, 21101040, 21173060) supported the National Natural Science Foundation of China;Project (HEUCF201210002) supported the Fundamental Research Funds for the Central Universities, China |
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| 摘 要： | 在温度为943K的LiCl-KCl-KF熔盐体系中添加不同浓度的La2O3和MgCl2直接电解制备Mg-Li-La合金。运用X射线衍射分析、扫描电子显微镜及能谱分析和金相显微镜对所得合金进行分析。结果表明,在熔盐体系中通过添加La2O3直接制备Mg-Li-La合金的方法是可行的。在电解过程中,温度不变,槽电压随着电流密度的增加而增加,而改变温度对于槽电压影响不大。X射线衍射分析结果表明,通过恒电流电解可以得到α+Mg17La2,α+β+Mg17La2和β+LaMg3三种不同镁、镧含量的Mg-Li-La合金。能谱分析结果表明,Mg元素在合金中分布均匀,然而La元素主要分布在晶界处与Mg形成金属间化合物。
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| 关 键 词： | Mg-Li-La合金 La2O3 电解 微观组织 |
| 收稿时间： | 2010-09-23 |
Preparation of Mg-Li-La alloys by electrolysis in molten salt |
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| ZHANG Mi-lin, CAO Peng, HAN Wei, YAN Yong-de, CHEN Li-jun. Preparation of Mg-Li-La alloys by electrolysis in molten salt[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(1): 16-22. DOI: 10.1016/S1003-6326(11)61133-3 |
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| Authors: | ZHANG Mi-lin CAO Peng HAN Wei YAN Yong-de CHEN Li-jun |
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| Affiliation: | Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | An electrochemical method was used to prepare Mg-Li-La alloys in a molten LiCl-KCl-KF-MgCl2 containing La2O3 at 943 K. The results showed preparation of Mg-Li-La alloys by electrolysis is feasible. The Mg-Li-La alloys were analyzed by means of X-ray diffraction (XRD), optical micrograph (OM) and scanning electron microscopy (SEM). XRD analysis indicates that α+Mg17La2, α+β+Mg17La2 and β+LaMg3 Mg-Li-La alloys with different lithium and lanthanum contents were obtained via galvanostatic electrolysis. The microstructures of typical α+Mg17La2 and β+LaMg3 phases of Mg-Li-La alloys were characterized by optical microscopy (OM) and scanning electron microscopy (SEM). The analysis of energy dispersive spectrometry (EDS) shows that the element of Mg distributes homogeneously in the Mg-Li-La alloy and the element of La mostly exists at grain boundaries to restrain the grain growth rate due to the larger ionic radius and lower electronegativity compared with Mg. |
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| Keywords: | Mg-Li-La alloys La2O3 electrolysis microstructure |
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