利用XRD、SEM和电阻应变片等方法研究了Tb0.3Dy0.7(Fe1-xPtx)1.95(x=0.00,0.02,0.04,0.06,0.08)合金的微结构和磁致伸缩特性.结果表明:当Pt含量x≤0.06时,合金为具有立方MgCu2型结构的Laves单相,Pt置换Fe导致合金相的晶格常数α线性增大;磁致伸缩系数λ随Pt含量的增加不断减小,随外磁场(H≤500mT)的增大而单调增大;当合金在950℃退火4 h,可获得较好的磁伸缩性能.在x=0.08时,合金中出现微量第二相Fe3Dy,证实Pt在Tb0.3Dy0.7Fe1.95合金中的最大固溶度小于5at%.
参考文献
[1] | Kubaschewski.Binary Alloy Phase Diagrams[M].OH:ASM International,Materials Park,1997:1572. |
[2] | Ma Lei;Gu Zhengfei;Zhong Xiaping .Solid state phase equilibria in the Fe-Pt-Dy ternary system at 900 deg C[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):130-133. |
[3] | Clark A E;Wohlfarth E P.Ferromagnetic Materials[M].Anrsterdam:North-Holland,1980:531. |
[4] | Funayama T;Kobayashi T;Sakia I et al.[J].Applied Physics Letters,1992,61:114. |
[5] | Du J;Wang J H;Tang C C et al.[J].Appl Phs Lett,1998,72:489. |
[6] | Prajapati K;Jenner A G;Schulze M P et al.[J].Applied Physics,1993,73:6171. |
[7] | 钟俊辉 .[J].材料导报,1995,1:24. |
[8] | 何国;周寿增;李建国.[J].材烂导报,1996(05):12. |
[9] | 莫全龙,李瑛.稀土磁致伸缩材料的热处理[J].金属热处理,2000(12):13-14. |
[10] | 马垒,顾正飞,成钢,钟夏平,徐成福,周波,汪元亮.Fe60.5-xPt39.5Dyx(x=0.5,1.0)磁性合金的相转变和磁性能研究[J].电工材料,2006(01):17-20. |
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