机构地区: 桂林电子科技大学材料科学与工程学院
出 处: 《功能材料》 2007年第A03期1136-1138,共3页
摘 要: 采用粉末粘结-压缩成型工艺制备出性能良好的超磁致伸缩复合材料(Giant Magnetostrictive Powder Composite, GMPC ),着重研究了合金粉末与绝缘树脂的配比对GMPC的磁致伸缩性能及密度的影响规律,并对其动态电阻率进行了测试分析。结果表明,所制备的GMPC的磁致伸缩量随合金含量的增加而增加,当磁场强度为400kA/m、树脂与合金粉末的体积比为1:9时,GMPC具有最高磁致伸缩系数λm,为558×10^-6;当粘结剂与磁粉的体积比小于3:7时,GMPC的密度随树脂含量增加而增大,体积比为3:7时,密度达最大值,为6.25g/cm,此后,随着树脂含量的增加,GMPC密度明显减小,当体积比为7:3时,密度达最小值,为3.06g/cm^3;GMPC的动态电阻率大于5.24×10^3Ω·cm,GMPC的成功制备将大大拓宽其在高频技术领域中的应用. Giant Magnetostrictive Powder Composite (GMPC) was prepared by using power bonding and magnetic field forming technique. The effect of GMM alloy and epoxy volume ratio on magnetostriction and density of GMPC was studied, and dynamic resistivity of GMPC was tested and discussed. The results showed that the magnetostriction of GMPC increases with increasing of alloy particles volume percent, and when the magnetic field is 400kA/m and the volume ratio of epoxy to GMM alloy is 1:9, GMPC has the highest magne-tostriction λm,558×10^-6. The dynamic resistivity of GMPC is larger than 5.24×10^3Ω·cm, and brings on 8 order of magnitude comparing with GMM. The success of GMPC preparing will widen the applications of GMM in high frequency technique fields.
关 键 词: 树脂基 复合材料 粉末粘结 超磁致伸缩 电阻率
领 域: [一般工业技术]