Phase formation with NaZn13 structure in metamagnetic La(Fe1-xCox)11.9Si1.1 compounds
来源期刊：JOURNAL OF RARE EARTHS2008年第5期
论文作者：BAO Bo FU Bin ZHANG Hu LONG Yi WAN Farong CHANG Yongqin SHI Puji
Key words：rare earth alloys and compounds; solid state reactions; magnetocaloric; X-ray diffraction;
Abstract: The effects of different annealing conditions on the phase formation with NaZn13 structure were investigated in La(Fe1-xCox)11.9Si1.1(x=0.068) compounds. It was found that the 1:13 phase was not formed directly from the melt upon cooling but via a peritectic reaction between the pro-peritectic γ-Fe and the La-rich phase. Annealing temperature was very important for the formation of 1:13 phase. Ice water was confirmed to be a preferable quenching medium. La(Fe1-xCox)11.9Si1.1(x=0.068) compounds with almost single 1:13 phase were obtained at 1473 K after 15 d.
BAO Bo1，FU Bin1，ZHANG Hu1，LONG Yi1，WAN Farong1，CHANG Yongqin1，SHI Puji1
(1.School of Materials Science and Engineering,University of Science and Technology of Beijing,Beijing,100083,China)
Abstract:The effects of different annealing conditions on the phase formation with NaZn13 structure were investigated in La(Fe1-xCox)11.9Si1.1(x=0.068) compounds. It was found that the 1:13 phase was not formed directly from the melt upon cooling but via a peritectic reaction between the pro-peritectic γ-Fe and the La-rich phase. Annealing temperature was very important for the formation of 1:13 phase. Ice water was confirmed to be a preferable quenching medium. La(Fe1-xCox)11.9Si1.1(x=0.068) compounds with almost single 1:13 phase were obtained at 1473 K after 15 d.
Key words:rare earth alloys and compounds; solid state reactions; magnetocaloric; X-ray diffraction;
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