Local structure of NiAl compounds investigated by extended X-ray absorption fine-structure spectroscopy

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	Local structure of NiAl compounds investigated by extended X-ray absorption fine-structure spectroscopy
	J. S. Tian; G. M. Han; H. Wei; T. Jin; M. S. Dargusch
	2012
发表期刊	Journal of Synchrotron Radiation
ISSN	0909-0495
卷号	19 页码:503-507
摘要	The local structures of pure NiAl and Ti-, Co-doped NiAl compounds have been obtained utilizing extended X-ray absorption fine-structure (EXAFS) spectroscopy. The results provide experimental evidence that Ni antisite defects exist in the Ni-rich NiAl compounds. The site preference of Ti and Co has been confirmed. Ti occupies the Al sublattice, while Co occupies the Ni sublattice. The structure parameters obtained by EXAFS were consistent with the X-ray diffraction results. Owing to the precipitation of alpha-Cr, the local structure of NiAl-Cr has not been obtained, making the site preference of Cr unclear.
部门归属	[tian, j. s.; han, g. m.; wei, h.; jin, t.] chinese acad sci, superalloys div, inst met res, shenyang 110016, peoples r china. [tian, j. s.] chinese acad sci, grad sch, beijing 100039, peoples r china. [dargusch, m. s.] univ queensland, cast, crc, sch mech & min engn, brisbane, qld 4072, australia.;wei, h (reprint author), chinese acad sci, superalloys div, inst met res, 72 wenhua rd, shenyang 110016, peoples r china.;hwei@imr.ac.cn
关键词	Nial Compounds Exafs Local Structure Site Preference Alpha-cr Precipitation Nickel-aluminum System Site Preference Mechanical-properties Intermetallic Alloys Ternary Additions Fe Co Occupancies Elements Tensile
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60264
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. S. Tian,G. M. Han,H. Wei,et al. Local structure of NiAl compounds investigated by extended X-ray absorption fine-structure spectroscopy[J]. Journal of Synchrotron Radiation,2012,19:503-507.
APA	J. S. Tian,G. M. Han,H. Wei,T. Jin,&M. S. Dargusch.(2012).Local structure of NiAl compounds investigated by extended X-ray absorption fine-structure spectroscopy.Journal of Synchrotron Radiation,19,503-507.
MLA	J. S. Tian,et al."Local structure of NiAl compounds investigated by extended X-ray absorption fine-structure spectroscopy".Journal of Synchrotron Radiation 19(2012):503-507.