Deformation and fracture mechanisms of Al2O3/Nb/Al2O3 composites under compression

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	Deformation and fracture mechanisms of Al2O3/Nb/Al2O3 composites under compression
	Z. F. Zhang; D. Brunner; C. Scheu; M. Ruhle
	2005
发表期刊	Zeitschrift Fur Metallkunde
ISSN	0044-3093
卷号	96 期号:1 页码:62-70
摘要	The deformation and fracture behavior of polycrystalline Al2O3 and Al2O3/Nb/Al2O3 composites with perpendicular and inclined interfaces were investigated at room temperature by means of compression tests. It was found that polycrystalline Al2O3 fractured at higher stresses (>500 MPa) than Al2O3/Nb/Al2O3 composites, and that its failure always showed a split fracture mode. For the Al2O3/Nb/ Al2O3 specimens with interfaces perpendicular to the loading direction, cracks normally nucleated near the Nb/ Al2O3 interfaces and then propagated along the loading direction, finally leading to a split fracture in the polycrystalline Al2O3 parts. For the Al2O3/Nb/Al203 specimens with interfaces inclined to the loading direction, the split fracture of the polycrystailine Al2O3 parts strongly depends on the orientation of the Al2O3/Nb interfaces with respect to the loading direction. For all the Al2O3/Nb/Al2O3 specimens, intergranular cracking was seldom observed independent whether the interfaces are perpendicular or inclined to the loading direction. Based on these results, the fracture mechanisms of Al2O3 and Al2O3/Nb/Al2O3 specimens are discussed.
部门归属	chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. max planck inst metallforschung, stuttgart, germany. univ stuttgart, materialprufungsanstalt, d-7000 stuttgart, germany.;zhang, zf (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
关键词	Al2o3/nb/al2o3 Composites Compression Interfaces Split Fracture Doped Nb-al2o3 Bicrystals Metallic-glass Interface Sapphire Strength Niobium Alumina Growth Temperatures Initiation
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WOS记录号	WOS:000226978000008
引用统计	被引频次：5[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/321006/35248
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. F. Zhang,D. Brunner,C. Scheu,et al. Deformation and fracture mechanisms of Al2O3/Nb/Al2O3 composites under compression[J]. Zeitschrift Fur Metallkunde,2005,96(1):62-70.
APA	Z. F. Zhang,D. Brunner,C. Scheu,&M. Ruhle.(2005).Deformation and fracture mechanisms of Al2O3/Nb/Al2O3 composites under compression.Zeitschrift Fur Metallkunde,96(1),62-70.
MLA	Z. F. Zhang,et al."Deformation and fracture mechanisms of Al2O3/Nb/Al2O3 composites under compression".Zeitschrift Fur Metallkunde 96.1(2005):62-70.