Study on Interaction between Lanthanum and Phosphor in Purity Steel
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第2期
论文作者：Lin Qin Guo Feng
Key words：particles containing La and P; purity steel with lanthanum; element segregation; rare earths;
Abstract: 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.
Lin Qin1，Guo Feng2
(1.Physical Chemistry Department, University of Science and Technology Beijing, Beijing 100083, China;
2.College of Materials Science and Engineering, Inner Mongolia University of Technology, Huhhot 010051, Chain)
Abstract: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.
Key words:particles containing La and P; purity steel with lanthanum; element segregation; rare earths;
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