High-resolution electron microscope observation of interface microstructure of a cast Al-Mg-Si-Bi-Pb(6262)/Al2O3p composite

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	High-resolution electron microscope observation of interface microstructure of a cast Al-Mg-Si-Bi-Pb(6262)/Al2O3p composite
	Z. Zhou; Z. Fan; H. X. Peng; D. X. Li
	2001
发表期刊	Journal of Microscopy-Oxford
ISSN	0022-2720
卷号	201 页码:144-152
摘要	High-resolution electron microscopy was employed to characterize the interface structure of a cast Al-Mg-Si-Bi-Pb aluminium(6262)-based composite reinforced by cr alumina particles with a trace of beta alumina in order to investigate the behaviour of alloying elements in cast composites, Except for a few primary Mg2Si particles, few reaction products were detected at the interface of Al/alpha -Al2O3 due to the unfavourable reaction kinetics during the squeeze-casting process. The Mg2Si particle has an orientation relationship with alpha -Al2O3 of [011](Mg2Si)//[1 (2) over bar 10](alpha -Al2O3) (1 (1) over bar1)(Mg2Si)//(0006)(alpha -Al2O3). A significant amount of MgAl2O4 was found on the surface of the beta -Al2O3 particles, which is in contrast to the small degree of reaction found on alpha -Al2O3 particles, MgAl2O4 and beta -Al2O3 particles have the following orientation relationship: [011](MgA12O4)//[1 (2) over bar 10](beta -Al2O3) (1 (1) over bar1) (MgAl2O4)//(0006)(beta -Al2O3). The similar crystal structure of beta -Al2O3 to MgAl2O4 favours MgAl2O4 nucleation and growth on the surface of beta -Al2O3. Interfacial energy minimization dominates the atomic structure of the interface with the result that close packed planes and directions in the Al2O3 reinforcement and reaction products are parallel to the interfaces. Bi and Pb were found in the form of metallic nanometre particles between Al2O3 particles, or between the MgAl2O4 and Al2O3 particles, or in the open channels of beta -Al2O3 filled by the Al matrix.
部门归属	chinese acad sci, inst met res, lab atom imaging solids, shenyang, peoples r china. brunel univ, dept mat engn, uxbridge ub8 3ph, middx, england.;zhou, z (reprint author), univ sheffield, dept mat engn, sir robert hadfield bldg, sheffield s1 3jd, s yorkshire, england
关键词	Al-mg-si-bi-pb Alpha Alumina Beta Alumina Composite Hrem Interface Metal-matrix Composites Aluminum-magnesium Alloys Piston Alloy Fiber Fabrication Particulate Spinel Al2o3 Infiltration Preforms
URL	查看原文
WOS记录号	WOS:000167686400005
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36963
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Zhou,Z. Fan,H. X. Peng,et al. High-resolution electron microscope observation of interface microstructure of a cast Al-Mg-Si-Bi-Pb(6262)/Al2O3p composite[J]. Journal of Microscopy-Oxford,2001,201:144-152.
APA	Z. Zhou,Z. Fan,H. X. Peng,&D. X. Li.(2001).High-resolution electron microscope observation of interface microstructure of a cast Al-Mg-Si-Bi-Pb(6262)/Al2O3p composite.Journal of Microscopy-Oxford,201,144-152.
MLA	Z. Zhou,et al."High-resolution electron microscope observation of interface microstructure of a cast Al-Mg-Si-Bi-Pb(6262)/Al2O3p composite".Journal of Microscopy-Oxford 201(2001):144-152.