Fe-Cr-Co-Si 合金のスピノーダル分解生成物のアトムプローブ電界イオン顕微鏡による解析(微小域構造解析)(<特集>分析評価・解析)

概要

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Partition of alloying elements between spinodally-decomposed phases in Fe-Cr-Co-Si alloys was examined by Atom-Probe Field-Ion Microscope (AP-FIM). The results showed that the ferromagnetic particle (α_1) is rich in Fe and Co, and the weak-ferromagnetic matrix (α_2) rich in Cr and Si. The enrichment of Si in the α_2 phase was explained through thermodynamical considerations. Si is more strongly bonded to Cr than to Fe. The improvement of hard magnetic properties by Si additions was found and discussed in terms of the changes in saturation magnetization of the α_1 and α_2 phases. The increase in coercive force may be mainly attributed to the reduction of saturation magnetization of the α_2 phase by the addition of Si.
1991-11-01