Topics on microstructure researches in TiAl intermetallics using atomic scale observation and computational simulation

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	Topics on microstructure researches in TiAl intermetallics using atomic scale observation and computational simulation
	L. L. He; L. G. Zhou; R. Yu; L. Dong; H. Q. Ye
	2001
发表期刊	International Journal of Materials & Product Technology
ISSN	0268-1900
页码	13-22
摘要	TiAl-based alloys have received much attention in recent years since they are primary candidates for high-temperature structure material. In this paper, characterization of atomic structures of TiAl grain boundaries (GBs) and identification of a Ti2Al phase were performed on the atomic scale in combination of experimental observation and computational simulation. Using high-resolution electron microscope (HREM) observation and MS calculation, the atomic structure of an asymmetry large angle tilting GB has been characterized, which was named as a pseudo Sigma 3 (1 (5) over bar(1) over bar) [101] / / (1 (1) over bar1) [110] GB. Based on HREM observation, nano-beam EELS and EDS analysis and ab initio pseudopotential calculation for the cohesive energy of compound, the Ti2Al phase was identified. Its unit cell has the stacking sequences (Al,3Ti)-(Al,3Ti)-(Al,3Ti)-(Al,Ti)-(Al,3Ti)-(Al,Ti) with ABCBB'CB' order, which is different from the reported model.
部门归属	chinese acad sci, inst met res, atom imaging solids lab, shenyang 110015, peoples r china.
关键词	Tial Intermetallics Asymmetry Large Angle Tilting Gb Ti2al Phase Hrem Ms Calculation Ab Initio Pseudopotential Calculation Ti2al Phase Alloys Al
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WOS记录号	WOS:000174288300003
引用统计	被引频次：1[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/321006/36667
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. L. He,L. G. Zhou,R. Yu,et al. Topics on microstructure researches in TiAl intermetallics using atomic scale observation and computational simulation[J]. International Journal of Materials & Product Technology,2001:13-22.
APA	L. L. He,L. G. Zhou,R. Yu,L. Dong,&H. Q. Ye.(2001).Topics on microstructure researches in TiAl intermetallics using atomic scale observation and computational simulation.International Journal of Materials & Product Technology,13-22.
MLA	L. L. He,et al."Topics on microstructure researches in TiAl intermetallics using atomic scale observation and computational simulation".International Journal of Materials & Product Technology (2001):13-22.