Fe-42Ni 合金における微量元素の表面偏析(表面分析)(<特集>分析評価・解析)

概要

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The surface compositions of Fe-42 wt%Ni alloy at high temperatures have been observed in ultra high vacuum by using AES (Auger Electron Spectroscopy). Phosphorus, manganese, chromium, boron, nitrogen and sulfur segregate to the surface at various temperatures. Phosphorus, is dominant at temperatures from 550℃ to 600℃. Boron nitride is substituted the element from 600℃ to 850℃. Moreover, sulfur substitute boron nitride above 850℃. B KLL AES spectrum and Bls EELS (Electron Energy Loss Spectroscopy) spectrum have revealed that boron and nitrogen precipitate as boron nitride after the annealing. Moreover, boron segregates as a boron at the first stage. At the second stage, boron nitride is formed as a result of the surface reaction between the segregated boron and nitrogen which segregates after the boron segregation. Auger images have revealed that the coverage of the elements is almost uniform at the surface. The calculation of the intensity of the AES peak revealed that the thickness of the layer for the surface segregated elements is about one or three monolayers.
社団法人日本鉄鋼協会の論文
1991-11-01