Microstructure and mechanical behavior of the NiAl-TiC in situ composite

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	Microstructure and mechanical behavior of the NiAl-TiC in situ composite
	Z. P. Xing; J. T. Guo; Y. F. Han; L. G. Yu
	1997
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	28 期号:4 页码:1079-1087
摘要	The microstructure, interfaces, and mechanical properties of NiAl-matrix composites reinforced by 0 and 20 vol pct TiC particles have been examined. The composites were prepared by the hot-press-aided exothermic synthesis (HPES) technique. Portions of the HPES-processed samples were hot isostatically pressed (''hipped'') at 1165 degrees C/150 MPa for 4 hours or annealed at 1400 degrees C for 48 hours. In the as-fabricated state, TiC particles were generally polygonal and faceted, and the interfaces' between TiC and NiAl were atomically flat, sharp, and generally free from any interfacial phase. At least two orientation relationships between TiC and NiAl were observed. In some cases, thin amorphous layers existed at NiAl/TiC interfaces. After ''hipping,'' the TiC particles tended to become round and the TiC/NiAl interfaces became overlapped. Annealing at 1400 degrees C for 48 hours did not affect the microstructure or the interfacial structure of the composite in most cases. The compressive yield strengths (YSs) from room temperature to 1100 degrees C of the composite were considerably higher than that of the monolithic NiAl. At 980 degrees C, the tensile YS of the composite was approximately 3 times that of the monolithic NiAl. In addition, the ambient fracture toughness of the composite was 50 pct higher than that of the monolithic NiAl.
部门归属	acad sinica,inst met res,shenyang 110015,peoples r china.;xing, zp (reprint author), inst aeronaut mat,beijing 100095,peoples r china
关键词	Nickel Aluminide Intermetallics Crack Deflection Processes Fracture-toughness Compression Properties Matrix Composites Interfaces Deformation Particulate 1200-k 1300-k
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38155
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. P. Xing,J. T. Guo,Y. F. Han,et al. Microstructure and mechanical behavior of the NiAl-TiC in situ composite[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,1997,28(4):1079-1087.
APA	Z. P. Xing,J. T. Guo,Y. F. Han,&L. G. Yu.(1997).Microstructure and mechanical behavior of the NiAl-TiC in situ composite.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,28(4),1079-1087.
MLA	Z. P. Xing,et al."Microstructure and mechanical behavior of the NiAl-TiC in situ composite".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 28.4(1997):1079-1087.