Formation of iron-nitride/silver nanocomposites by ammonia-flow method and nitride phase identification by X-ray absorption near-edge structure

被引：4

作者：

Nishimaki, K ^{[1
]}

Yamamoto, TA ^{[1
]}

Nakagawa, T ^{[1
]}

Katsura, M ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Nucl Engn, Suita, Osaka 5650871, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2000年 / 39卷 / 3A期

关键词：

gamma '-Fe4N; epsilon-Fe2-4N; ammonia-flow method; nitrogen activity; nanocomposite; X-ray absorption near-edge structure (XANES);

D O I：

10.1143/JJAP.39.1225

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic nanocomposites in which iron nitride nanograins were dispersed in a silver matrix were synthesized by nitriding iron oxide nanograins buried in the matrix. The ammonia-flow method, in which the solid phase reacted with flowing ammonia, was adopted for this synthesis. Several reactions of metallic iron with NH3 were carried out under various conditions and the resultant nitride phases were observed by X-ray diffraction (XRD). Based on these results, optimum conditions for the synthesis of the nanocomposite were determined, and a nanocomposite containing only gamma'-Fe4N or epsilon-Fe2-4N was successfully obtained. Phase identification of iron nitride in the composite was performed by X-ray absorption near-edge structure (XANES) measurement, which was found to be more suitable for the present nanocomposites than XRD.

引用

页码：1225 / 1229

页数：5

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