【摘要】 用TEM+EDAX和AES方法研究了Fe-0.3%P-0.16%Ce和Fe-0.3%P合金Ce和P的晶界平衡偏聚及Ce对P平衡偏聚的影响,并且对合金的脆性做了研究.结果表明,Fe-0.3%P-0.16%Ce合金晶界有Ce和P的共偏聚,磷的平衡偏聚量不低于Fe-0.3%P合金,但是脆性却由于Ce的偏聚而显著改善.本文从界面二维相的观点讨论了Ce和P在晶界的相互作用.更多还原

【Abstract】 The equilibrium intergranular segregation of Ce and P in α-Fehas been analyzed by employing the combination of TEM+EDAX and AES. Theeffect of Ce on the equilibrium segregation of P and the embrittlement of the alloyshas also been studied in detail. The results show that there is cosegregation of Ceand P at the grain boundaries in Fe-0.3%P-0.16%Ce alloy. The addition of Ce doesnot decrease the equilibrium segregation of P, but significantly lowers the ductile-brittle transition temperature. The interaction between Ce and P at grain bounda-ries was discussed from the point of the interfacial two-dimensional phase.更多还原