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Investigation on the 773 K isothermal section of La-Fe-Sn ternary systems by X-ray powder diffraction

Investigation on the 773 K isothermal section of La-Fe-Sn ternary systems by X-ray powder diffraction
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摘要 The 773 K isothermal section of the La-Fe-Sn ternary system was investigated and constructed by X-ray powder diffraction（XRD）.The existence of two reported ternary intermetallic compounds,La6Fe13Sn and La3FeSn6,is confirmed in this work.Compared with other R-Fe-Sn phase diagrams（R = Pr and Sm）,the binary alloys Fe3Sn and Fe5Sn3 are not present.The compound Fe3Sn2 was observed from the XRD pattern of Fe3Sn2 samples,but it is not an equilibrium phase at 773 K and decomposes into Fe and FeSn phases completely for a longer heat treated time.Up to now,the crystal structure data of La2Sn3 has not been reported,so the X-ray pattern of La2Sn3 was only estimated.The phase relationship for this compound was drawn by a dotted line. The 773 K isothermal section of the La-Fe-Sn ternary system was investigated and constructed by X-ray powder diffraction（XRD）.The existence of two reported ternary intermetallic compounds,La6Fe13Sn and La3FeSn6,is confirmed in this work.Compared with other R-Fe-Sn phase diagrams（R = Pr and Sm）,the binary alloys Fe3Sn and Fe5Sn3 are not present.The compound Fe3Sn2 was observed from the XRD pattern of Fe3Sn2 samples,but it is not an equilibrium phase at 773 K and decomposes into Fe and FeSn phases completely for a longer heat treated time.Up to now,the crystal structure data of La2Sn3 has not been reported,so the X-ray pattern of La2Sn3 was only estimated.The phase relationship for this compound was drawn by a dotted line.
作者 CHEN Xiang ZHUANG Yinghong CHEN Yungui
机构地区 Key Laboratory of Nonferrous Metal and New Processing Technology of Materials (Ministry of Education of China) Department of Physics and Electronic Information Engineering Department of Metallic Materials Engineering
出处 《Rare Metals》 SCIE EI CAS CSCD 2010年第6期567-571,共5页 稀有金属（英文版）
关键词 INTERMETALLICS QUENCHING phase diagrams X-ray diffraction. intermetallics quenching phase diagrams X-ray diffraction.
分类号 O625.312 [理学—有机化学] O736 [理学—晶体学]
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参考文献21

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Rare Metals
2010年 第6期

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