| Modification of primary Mg2Si in Mg-5Si alloys with Y2O3 |
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| 作者姓名： | 郑娜 王慧远 赵峰 顾振华 李栋 姜启川 |
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| 作者单位： | Key Laboratory of Automobile Materials of Ministry of Education,Department of Materials Science and Engineering, Jilin University, Changchun 130025, China |
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| 基金项目： | Project（50501010） supported by the National Natural Science Foundation of China; Project supported by the 985-Automotive Engineering of Jilin University, China |
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| 摘 要： | The Y2O3 addition to Mg-5Si alloys has a good modification effect on the primary Mg2Si. With 0.05% or 0.1% （mass fraction） Y203 additions, the primary Mg2Si begins to change from coarse dendritic shape （about 100 μm） into small polyhedral shape and therefore the alloys exhibits sub-modified microstructure. With 0.2% Y2O3 addition, most of the primary Mg2Si becomes polyhedral shape and its average size is only 25 μm or less. The Mg-5Si alloy exhibits modified microstructure. In addition, the experiments show that the reaction between Mg and Y2O3 cannot occur in the sintered Mg-6Y2O3 compact; however, the reaction among Mg, Si and Y2O3 can occur in the sintered Mg-5Si-6Y2O3 compact. Apart from the adsorption and poisoning manners, other mechanisms may exist in the modification of Y2O3 addition on the primary Mg2Si.
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| 关 键 词： | 微观结构 固体凝固法 合金 生产技术 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
Modification of primary Mg2Si in Mg-5Si alloys with Y2O3 |
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| ZHENG Na, WANG Hui-yuan, ZHA Feng, GU Zhen-hua, LI Dong, JIANG Qi-chuan.Modification of primary Mg2Si in Mg-5Si alloys with Y2O3[J].Transactions of Nonferrous Metals Society of China,2007,17(A01):440-443. |
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| Authors: | ZHENG Na WANG Hui-yuan ZHA Feng GU Zhen-hua LI Dong JIANG Qi-chuan |
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| Affiliation: | ZHENG Na, WANG Hui-yuan, ZHA0 Feng, GU Zhen-hua, LI Dong, JIANG Qi-chuan |
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| Abstract: | |
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| Keywords: | microstructure solidification Mg2Si Y2O3 Mg-5Si alloy |
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