机构地区: 桂林电子科技大学材料科学与工程学院
出 处: 《四川大学学报(工程科学版)》 2009年第5期126-131,共6页
摘 要: 以粉末粘结、模压成型方法,研制环氧树脂粘结稀土-铁系超磁致伸缩复合材料。采用电阻应变片技术,研究树脂含量、压应力大小对复合材料的磁致伸缩性能的影响规律。结果表明,当合金粉末与树脂体积比为9∶1时,在1 MP压应力下其饱和磁致伸缩系数高达1070×10-6。树脂含量、压应力大小对复合材料的磁致伸缩特性的影响很大。过高或过低的树脂含量均不利于材料的磁致伸缩性能的提高,获得较高磁致伸缩性能时的合金粉末与树脂最优体积比为7∶3。较小压应力能提高材料的磁致伸缩性能,压应力进一步增大则磁致伸缩性能降低,特别是在低磁场下,在较大预加应力条件下测得的样品的磁致伸缩性能较低。获得较高磁致伸缩性能时的压应力为1MPa。 Polymer-matrix giant magnetostrictive composites were prepared by combining Tb0.30Dy0.7Fe1.95with epoxy.The effect of epoxy content and preload stress on the magnetostriction of composites was studied using standard strain gauge technique.The results showed that the magnetostriction of the composites of Valloy∶VE-44 =9∶1 was 1070×10-6 under 1 MPa preload-stress.There were very marked effect of the epoxy content and preload-stress on the magnetostriction of the composites.The excessive or lesser epoxy conten...
领 域: [一般工业技术]