鐵素體中Ce與P晶界共偏聚的化學狀態

Chemical State of Cosegregation of P and Ce at Ferrite Grain Boundary

摘要: 用XPS結合計算機模擬研究了Ce與P在鐵素體晶界上的偏聚狀態。結果表明:當晶界P偏聚濃度較低,并以固溶態存在時,Ce對P的化學狀態影響較小;當P的晶界濃度較高時,并以不同的化學狀態存在時,Ce的影響較大,較多的Ce會改變P的化學狀態。計算機模擬表明,晶界上P的化學狀態取決于其偏聚結構。

Abstract: The state of cosegregation of P and Ce at ferrite grain boundaries in iron has been studied using the conbination with XPS and computer modelling. The results indicate that the concentration of P is less, the P atoms at grain boundaries are solid solution state and the influnce of Ce on the chemical state of P at grain boundaries is very small.As the concentration of P at grain boundries is rather high,Ce may change the chemical state of P.The computer modelling shows that the chemical state of P at grain boundaries depends on its segregated structure.