Microstructure and interface characterization of a cast Mg2B2O5 whisker reinforced AZ91D magnesium alloy composite

被引：71
作者：
Chen, S. H. [1 ]
Jin, P. P. [2 ]
Schumacher, G. [3 ]
Wanderka, N. [3 ]
机构：
[1] Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China
[2] Qinghai Univ, Inst Magnesium Technol, Xining 810016, Peoples R China
[3] Helmholtz Zentrum Berlin Mat & Energie GmbH, D-14109 Berlin, Germany
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2010年 / 70卷 / 01期
基金：
中国科学院西部之光基金;
关键词：
Metal-matrix composites (MMCs); Interface; Transmission electron microscopy (TEM); X-ray diffraction (XRD); Casting; MECHANICAL-PROPERTIES; BORATE; FABRICATION; PHASE; PARTICULATE; GROWTH; SI;
D O I：
10.1016/j.compscitech.2009.09.015
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
In this study, the microstructure and interface of a Mg2B2O5 whisker-rein forced magnesium composite were characterized using optical microscopy, transmission electron microscopy and X-ray diffraction. It was found that the Mg2B2O5 whiskers have a twinned structure with the (202) as the twin plane and growth direction along [010]. The MgB4O7 particles and the globular Mg2Si particles were observed within the Mg(2)B(2)O5 whisker, and at the interface between the Mg2B2O5 whiskers and Mg matrix, respectively. The MgO and MgB2 phase formed at the matrix-whisker interface during vacuum-gas pressure infiltration process due to the interfacial reaction. The crystallographic orientation relationships between the Mg2B2O5 whisker and the interfacial reaction products were found to be [010]mg(2)B(2)O(5)/[110](MgO) and [110](MgO)//[2 (1) over bar(1) over bar0]MgB2, and (202)Mg2B2O5//(002)(MgO) and (002)(MgO)//(0001)(MgB2), respectively. The factors that influence the microstructure of the Mg2B2O5 whiskers and the formation of the interfacial reaction products of Mg2Si, MgO and MgB2 phases were discussed. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：123 / 129
页数：7
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