Study on Interaction between Lanthanum and Phosphor in Purity Steel  

作　　者：郭锋 林勤 

机构地区：[1]College of Materials Science and Engineering,Inner Mongolia University of Technology [2]Physical Chemistry Department,University of Science and Technology Beijing

出　　处：《Journal of Rare Earths》2006年第z2期409-412,共4页稀土学报（英文版）

基　　金：Project supported by the Ministry of Science and Technology of China (2002BA315A-5)

摘　　要：Using SEM and EDS some particles containing La and P were discovered in low oxygen and sulfur purity steel with lanthanum. In these particles low melting point elements such as As and Sb also were detected. According to the result of simulative calculation of segregation, it is shown that La and P enrich so strongly in the process of solidification that their concentrations can satisfy thermodynamic condition to forme LaP compound or meet the requirements to forme eutectic phase in the last stage of solidification. Therefore, the particles are concluded as LaP compound or eutectics, which exist on grain boundary mainly.Using SEM and EDS some particles containing La and P were discovered in low oxygen and sulfur purity steel with lanthanum. In these particles low melting point elements such as As and Sb also were detected. According to the result of simulative calculation of segregation, it is shown that La and P enrich so strongly in the process of solidification that their concentrations can satisfy thermodynamic condition to forme LaP compound or meet the requirements to forme eutectic phase in the last stage of solidification. Therefore, the particles are concluded as LaP compound or eutectics, which exist on grain boundary mainly.

关 键 词：particles containing La and P purity steel with lanthanum element segregation rare earths 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG146.4[金属学及工艺—金属材料]