Effects of in-situ ZrB2 particle on grain refinement of ZrB2/AZ91D magnesium matrix composite

被引：0

作者：

Wu Jiangjing ^{[1
]}

Zhao Yutao ^{[1
]}

Zhang Songli ^{[1
]}

Chen Gang ^{[1
]}

Zhang Zhenya ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China

来源：

CHINA FOUNDRY | 2012年 / 9卷 / 01期

关键词：

in-situ ZrB2 particles; ZrB2/AZ91D composites; beta-Mg17Al12; phase; grain refinement; MASTER ALLOY; BEHAVIOR;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In-situ ZrB2/AZ91D magnesium matrix composite was successfully synthesized with Al/K2ZrF6+NH4BF4 by means of Direct Melt Reaction. The fabricated ZrB2/AZ91D magnesium matrix composite through direct melt mixing method was investigated. Results from X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS) confirmed the existence of ZrB2 particles in the AZ91D alloy, and most ZrB2 particles were in the size range of just several microns, some even to 100 nm. The cast specimens were studied through corrosion testing and heat treatment. The average grain size of AZ91D decreased markedly from about 250 mu m to 50 mu m. In addition, the shape and size of the beta-Mg17Al12 phase as well as the morphologies of primary alpha-Mg in the magnesium matrix composite were greatly changed. The network structure of the beta-Mg17Al12 phase was broken into small blocks and the size of alpha-Mg decreased significantly.

引用

页码：28 / 33

页数：6

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