Preparation and microstructure of in-situ (ZrB2+Al2O3+Al3Zr)p/A356 composite synthesized by melt direct reaction

被引：17
|
作者：
Yang Hua-jing [1 ]
Zhao Yu-tao [1 ]
Chen Gang [1 ]
Zhang Song-li [1 ]
Chen Deng-bin [1 ]
机构：
[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷 / 03期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
aluminum matrix composites; melt direct reaction; in situ particle; microstructure; MATRIX COMPOSITES; FABRICATION; TIB2;
D O I：
10.1016/S1003-6326(11)61215-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
(ZrB2+Al2O3+Al3Zr)/A356composites were synthesized by melt direct reaction from A356-(K2ZrF6+KBF4+Na2B4O7) system. The phase compositions and the microstructures of the as-prepared composites were investigated by XRD, SEM and TEM. The results show that the reinforcements are composed of ZrB2 and Al2O3 ceramic phase particles and Al3Zr intermetallic particles. The ZrB2 particulates are easy to join together to form some particle clusters and distribute along the alpha(Al) grain boundary. The morphologies of the ZrB2 particulates are in hexagon-shape with the size of about 50 nm. The TEM investigation results of Al3Zr indicate that Al3Zr grows in the form of facet with the length-diameter ratio of about 20. The morphologies of Al2O3 particles are in rectangular-shape and ellipsoidal-shape, with the size of about 0.1 mu m. In addition, the interfaces of the matrix and particles are net and no interfacial outgrowth is observed.
引用
收藏
页码：571 / 576
页数：6
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