Grain refining mechanism of ZnO particles on magnesium alloys

被引：0

作者：

Liu, Xuan ^{[1
]}

Zhang, Zhigiang ^{[2
]}

Hu, Wenyi ^{[2
]}

Le, Qichi ^{[2
]}

Bao, Lei ^{[2
]}

Lu, KaiKai ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

[2] Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, 314Mailbox, Shenyang 110819, Liaoning, Peoples R China

来源：

INDIAN JOURNAL OF ENGINEERING AND MATERIALS SCIENCES | 2016年 / 23卷 / 06期

关键词：

ZnO particles; Magnesium alloys; Grain refinement; Microstructure; REFINEMENT; MICROSTRUCTURES; NUCLEATION; MODEL;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Grain refining of ZnO particles on magnesium alloys has been investigated by suction casting. Based on the experimental and thermodynamic data available, ZnO particles would be converted into the solute Zn in Mg melt. However, the ZnO particles have a slightly stronger grain refining potency than Zn. The grain refining efficiency of ZnO particles is mainly attributed to the restricting effect of Zn solute and in situ produced MgO particles as potent nuclei. Meantime, the large amount of reaction heat may cause intensive micro convection and mass transfer to eliminate the solute accumulation between existed grains, which could improve the nucleation rate.

引用

页码：383 / 388

页数：6

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