Particle distribution study for low-volume fraction magnetostrictive composites
Particle distribution study for low-volume fraction magnetostrictive composites
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DOI：
10.1063/1.1389518
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发表时间：
2001-09-01
影响因子：
3.2
通讯作者：
Carman, GP
中科院分区：
文献类型：
--
作者：
Duenas, TA;Carman, GP
我们目前的实验结果[1-3]磁致伸缩复合材料含有20%的体积分数Terfenol-D粗颗粒（>>1微米）悬浮在非金属粘合剂。磁致伸缩应变和磁致弹性测量的结果提供了不同的粒度和粒度分布范围的颗粒分布。颗粒尺寸和堆积密度示出影响应变响应，并归因于退磁和加载（预应力）效应。无论是减少和增加DeltaE效应测量低场和高场，分别，并发现是独立的粒子分布。优化的双峰分布的响应增加了堆积密度，并且在可比较的磁场水平下产生比其他宽分散（多分散）（< 106、< 212和< 300 μ m）和窄分散（单分散）（< 45、98和275 μ m）分布大15%的磁致伸缩应变。(C)2001年美国物理学会。
We present experimental results for [1-3] magnetostrictive composites containing a 20% volume-fraction of Terfenol-D coarse particles (>>1 mum) suspended in a nonmetallic binder. Results from magnetostrictive strain and magnetoelastic measurements are provided for particle distributions that differ in particle size and range of size distribution. Particle size and packing density are shown to effect strain response and are attributed to demagnetization and loading (prestress) effects. Both a decreasing and increasing DeltaE effect are measured for low and high fields, respectively, and found to be independent of particle distribution. The response of an optimized bimodal distribution increases packing density and produces 15% larger magnetostrictive strains than the other widely dispersed (polydispersed) (< 106, < 212, and < 300 mum) and narrowly dispersed (monodispersed) (< 45, 98, and 275 mum) distributions at comparable magnetic field levels. (C) 2001 American Institute of Physics.