X-RAY-DIFFRACTION STUDY OF LOCAL ATOMIC STRUCTURES IN AMORPHOUS ND-FE-B ALLOYS

被引：13
|
作者：
YAMADA, M
TERASHIMA, Y
TANAKA, K
机构：
[1] Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya 466, Showa-ku
来源：
MATERIALS TRANSACTIONS JIM | 1993年 / 34卷 / 10期
关键词：
NEODYMIUM-IRON-BORON ALLOY GLASSES; ND2FE14B COMPOUND; X-RAY DIFFRACTION; RADIAL DISTRIBUTION FUNCTION; PARTIAL PAIR CORRELATION; COORDINATION NUMBER; TRIGONAL PRISM; X-RAY PHOTOEMISSION SPECTROSCOPY; VALENCE BAND SPECTRUM; COVALENT BONDING;
D O I：
10.2320/matertrans1989.34.895
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Local atomic structures in NdxFe82B18-x (x=0 to 18) and NdxFe100-x (x= 15 to 25) alloy glasses prepared by melt spinning are studied with X-ray diffraction technique. The total radial distribution function G(r) of each alloy is decomposed into partials, G(Fe-Fe)(r) and G(Fe-Nd)(r), and near-neighbour distances and coordination numbers associated with the Fe-Fe and Fe-Nd correlations are determined. The structure of the ternary alloy system is characterized by packing of a trigonal prism of 6 Fe atoms with a B atom at the center and 3 outer Nd atoms capping the rectangular faces, as is found in crystalline Nd2Fe14B compound. X-ray photoemission spectra of these alloys indicate that strong chemical bonding is formed between Fe and B atoms. Variation of the spectra with composition is understood on the basis of this local atomic structure.
引用
收藏
页码：895 / 900
页数：6
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