Concentration heterogeneity in structure of Ni3Al intermetallic synthesized under compression

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	Concentration heterogeneity in structure of Ni3Al intermetallic synthesized under compression
	O. B. Perevalova; M. B. Fedorischeva; V. E. Ovcharenko; H. H. Su
	2002
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	18 期号:5 页码:432-435
摘要	By X-ray analysis, TEM and SEM methods the phase composition, microstructure, and deviation from stoichiometric composition were investigated for the Ni3Al intermetallic compound obtained by cast and self-propagation high-temperature synthesis under compression with followed homogenization anneal, with the Al concentration being 24.0 and 25.0 at. pct with and without B (0.5 at. pct). It was discovered that in SHS intermetallic alloys an average local deviation from stoichiometric composition is significantly more than in the cast alloy. Dependence of the local deviation from the stoichiometric composition on the distance has a zig zag nature at the level of the grain groups. Deviation from the stoichiometric composition at the boundaries of the general type is less than at the boundaries of the special type. When the intensity of boundary migrations of the general type decreases, the degree of deviation from the stoichiometric composition increases. There is correlation between the solubility of B in the crystalline lattice of the Ni3Al phase and the value of the deviation from the stoichiometric composition in the grains. When the B concentration in a solid solution increases, the deviation from stoichiometric composition decreases..
部门归属	inst strength phys & mat sci, tomsk 634055, russia. chinese acad sci, inst met res, shenyang 110016, peoples r china.;perevalova, ob (reprint author), inst strength phys & mat sci, academicheskii ave,2-1, tomsk 634055, russia
关键词	Ni3al Intermetallic Shs Heterogeneity
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WOS记录号	WOS:000178443700016
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36388
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	O. B. Perevalova,M. B. Fedorischeva,V. E. Ovcharenko,et al. Concentration heterogeneity in structure of Ni3Al intermetallic synthesized under compression[J]. Journal of Materials Science & Technology,2002,18(5):432-435.
APA	O. B. Perevalova,M. B. Fedorischeva,V. E. Ovcharenko,&H. H. Su.(2002).Concentration heterogeneity in structure of Ni3Al intermetallic synthesized under compression.Journal of Materials Science & Technology,18(5),432-435.
MLA	O. B. Perevalova,et al."Concentration heterogeneity in structure of Ni3Al intermetallic synthesized under compression".Journal of Materials Science & Technology 18.5(2002):432-435.