摘要
研究了热处理工艺对<110>轴向取向Tb0.3Dy0.7(Fe1-xMx)1.95(M=Mn,Al,Ti,B,x=0.03)合金磁致伸缩性能与显微组织的影响。实验结果表明,热处理后合金的磁致伸缩应变λ和dλ/dH都显著提高,显微组织由片状晶向多边形晶粒转化,而且富稀土相在样品表面和晶界析出,晶粒内部的富稀土相有球化趋势。合理控制热处理温度和时间可以显著提高该合金的磁致伸缩性能。
The effects of heat treatment on the magnetostrictive properties and microstructure of Tb-Dy-Fe alloy with <110> crystal orientation was studied. The composition of alloy was Tb_(0.3)Dy_(0.7) (Fe_(1-x)M_x)_(1.95) (M=Mn, Al, Ti, B, x=0.03). It is found that the magnetostrictive strains λ and dλ/dH are improved markedly; the crystal morphologies are changed from parallel planes to polygons; furthermore, rare earth rich phases disperse along the grain boundaries and sample surface, a part of it in the grains; and rare earth rich phase in the grains has a tendency to be spheroidized after heat treatment. The magnetostrictive properties of the alloy can be improved by controlling the heat treatment temperature and time.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2005年第1期44-47,共4页
Journal of the Chinese Society of Rare Earths
基金
国家高技术研究发展计划(2002AAA305305)资助项目
