| Mg70Al20Ca10合金机械合金化过程中的结构变化 |
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| 引用本文： | 华旻,马立群,刘真云,丁毅.Mg70Al20Ca10合金机械合金化过程中的结构变化[J].轻合金加工技术,2007,35(5):44-47,55. |
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| 作者姓名： | 华旻 马立群 刘真云 丁毅 |
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| 作者单位： | 南京工业大学,材料学院,江苏,南京,210009 |
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| 基金项目： | 解放军重点项目;南京工业大学校科研和教改项目 |
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| 摘 要： | 以纯金属Mg、Al和Ca为原料,采用机械合金化的方法制备了Mg70Al20Ca10非晶态合金,分析了球磨过程中粉末试样的晶粒尺寸变化和相结构变化情况.结果表明,球磨过程中形成纳米晶和两种非晶相.Mg-Al-Ca合金在化学驱动力较小的条件下,可以通过机械驱动力的作用提高Ca、Al在Mg中的固溶度,导致非晶转变的发生.
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| 关 键 词： | 机械合金化 Mg-Al-Ca合金 非晶态 纳米晶 |
| 文章编号： | 1007-7235（2007）05-0044-04 |
| 修稿时间： | 2006-10-11 |
Structure change of Mg70Al20Ca10 alloy during mechanical alloying process |
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| HUA Min,MA Li-qun,LIU Zhen-yun,DING Yi.Structure change of Mg70Al20Ca10 alloy during mechanical alloying process[J].Light Alloy Fabrication Technology,2007,35(5):44-47,55. |
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| Authors: | HUA Min MA Li-qun LIU Zhen-yun DING Yi |
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| Affiliation: | Nanjing University of Technology,Nanjing 210009, China |
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| Abstract: | Mg70Al20Ca10amorphous alloy was prepared from pure magnesium, aluminum and calcium powders by mechanical alloying. Grain size ane structure of the as-milled powder samples were also investigated. The results show nanocrystalline and two kinds of amorphous phases form during the ball milling process.The formation of the amorphous phases in the Mg-Al-Ca system can be realized by expansion the solubility limit of Ca and Al in Mg via the mechanical driving force, even when the chemical driving force is very small. |
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| Keywords: | mechanical alloying Mg-Al-Ca alloy amorphous nanocrystalline |
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