Crystal structure and phase relations of Pr2Fe14B-La2Fe14B system
来源期刊:Journal of Rare Earths2016年第11期
论文作者:姚青荣 沈逸豪 杨鹏程 周怀营 饶光辉 邓建秋 王仲民 钟燕
文章页码:1121 - 1125
摘 要:The crystal structure and phase relations of the Pr2Fe14B-La2Fe14 B system were investigated by X-ray powder diffraction(XRD), differential scanning calorimetry(DSC) and scanning electron microscopy(SEM) equipped with energy dispersive X-ray spectroscopy(EDS). The crystal structure parameters were determined by full-profile Rietveld refinements. The results revealed that all alloys of(Pr1–xLax)2Fe14B crystallized the Nd2Fe14B-type structure with the space group P42/mnm and formed a continuous solid solutions between x=0.0 and 1.0. The lattice parameter a, c, unit-cell volume V and c/a ratio increased linearly with the La concentration. Determined by thermogravimetry analysis, the Curie temperature(TC), phase transition temperature and melting temperature of(Pr1–xLax)2Fe14B decreased linearly upon the La content. Based on the results of DSC measurements and X-ray powder diffraction examinations, the phase diagram of the Pr2Fe14B-La2Fe14 B system was built up.
姚青荣1,2,沈逸豪1,杨鹏程1,周怀营1,3,饶光辉1,邓建秋1,王仲民1,钟燕1,3,4
1. School of Materials Science and Engineering,Guilin University of Electronic Technology2. School of Materials Science and Engineering,Central South University3. Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology4. Guangxi Experiment Center of Information Science
摘 要:The crystal structure and phase relations of the Pr2Fe14B-La2Fe14 B system were investigated by X-ray powder diffraction(XRD), differential scanning calorimetry(DSC) and scanning electron microscopy(SEM) equipped with energy dispersive X-ray spectroscopy(EDS). The crystal structure parameters were determined by full-profile Rietveld refinements. The results revealed that all alloys of(Pr1–xLax)2Fe14B crystallized the Nd2Fe14B-type structure with the space group P42/mnm and formed a continuous solid solutions between x=0.0 and 1.0. The lattice parameter a, c, unit-cell volume V and c/a ratio increased linearly with the La concentration. Determined by thermogravimetry analysis, the Curie temperature(TC), phase transition temperature and melting temperature of(Pr1–xLax)2Fe14B decreased linearly upon the La content. Based on the results of DSC measurements and X-ray powder diffraction examinations, the phase diagram of the Pr2Fe14B-La2Fe14 B system was built up.
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