【摘要】 粘结TbDyFe合金是由TbDyFe粉末与粘结剂混合后压制成型并固化而成的 TbDyFe合金的原始组织是由RFe2 基体相和富稀土析出相以及RFe3 相组成 均匀化热处理后 ,富稀土相和RFe3 相减少 粘结TbDyFe合金的磁致伸缩性能与TbDyFe粉末颗粒尺寸的大小、粘结剂的粘度系数、粉末与粘结剂的配比、预应力的大小以及颗粒调整有很大关系 试验结果表明 ,TbDyFe粉末颗粒尺寸的大小和颗粒调整对粘结TbDyFe合金的磁致伸缩性能影响较大 在一定尺寸范围内 ,粘结TbDyFe合金的磁致伸缩性能随TbDyFe粉末颗粒尺寸的增大而提高 ;在压型过程中由于外加磁场作用使颗粒调整 ,即使得磁畴取向 ,从而提高了磁致伸缩性能更多还原

【Abstract】 Bonding TbDyFe alloy contains TbDyFe powder blended with a binder resin,compacted and cured in a vacuum oven.The original microstructure of bonding TbDyFe alloy is made of matrix RFe 2,Rare earth phase and RFe 3.Rare earth phase and RFe 3 are reduced after heat treatment.The magnetostrictive property of bonding TbDyFe is related to TbDyFe particle size,resin viscosity system,volume fraction of powder and binder,the magnitude of prestress and particle alignment.The results of experiments indicate that TbDyFe particle size and particle alignment significantly influence its magnetostrictive property.At a specific range with the magnetosrtictive property of bonding TbDyFe alloy is improved with the increase in particle size of TbDyFe powder because of the role of applied magnetic field during compaction,powders are aligned and the magnetostrictive property is improved更多还原