【摘要】 介绍了一种粉末冶金制备稀土磁致伸缩材料的方法,该方法包括铸造Tb0.30Dy0.70Fe1.80合金锭、制粉、磁场取向、压制成型和烧结工序。实验结果表明:粒度小于0.147 mm的Tb0.30Dy0.70Fe1.80合金粉末,经磁场取向后压制成型,在1200℃烧结2 h,并在950℃热处理24 h,当磁场强度为240 kA.m-1,预应力为8 MPa时,材料的磁致伸缩系数达到1.613×10-3。更多还原

【Abstract】 Powder metallurgy technique was applied to prepare rare earth giant magnetostrictive materials.This preparation process consists of cast Tb_0.30Dy_0.70Fe_1.80 alloy,which is pulverized by ball mill,aligned in magnetic field,compacted and sintered in inertial atmosphere.The experimental results indicate that when the magnetic field is 240 kA·m^-1,the sample with particle size less than 0.147 mm being compacted in magnetic field exhibits 1.613×10^-3 magnetostriction under a compressive pre-stress 8.0 MPa after being sintered at 1200 ℃ for 2 h and annealed at 950 ℃ for 24 h.更多还原