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

页码：895 / 900

页数：6

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