The influence of aspect ratio on the properties of cobalt nanowire-based magnetorheological fluids

作     者：R.C Bell N.M Wereley 

作者机构：Department of ChemistryThe Pennsylvania State UniversityAltoona CollegeAltoonaPAUSA Department of Aerospace EngineeringUniversity of MarylandCollege ParkMdUSA 

出 版 物：《International Journal of Smart and Nano Materials》 (国际智能和纳米材料杂志（英文）)

年 卷 期：2022年第13卷第4期

页      面：626-642页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：The authors acknowledge funding support from the National Science Foundation(CBET-0755696),The Pennsylvania State University,and Altoona College This publication was supported by the Pennsylvania State University Materials Research Institute Nano Fabrication Network and the National Science Foundation Cooperative Agreement No.0335765,National Nanotechnology Infrastructure Network,with Cornell University National Science Foundation United StatesNational Science Foundation United States[CBET-0755696] 

主　　题：Magnetorheological fluids nanowires size dependence 

摘      要：The yield stress of magnetorheological(MR)fluids has been shown to depend on particle morphology,but the exact nature of this contribution is still not fully *** this study,MR fluids containing 4 vol.%cobalt particles(spherical particles ***-wires)suspended in silicone oil were *** influence of the aspect ratio on the rheological properties of suspensions that contained cobalt nanowires with aspect ratios ranging from 10 to 101 in increments of~6 is *** cobalt nanowires were fabricated using alumina template-based electrodeposition,produ-cing wires with 305±66 nm *** shear stress was measured as a function of shear rate for increasing applied mag-netic *** apparent yield stress and viscosity as a function of changing aspect ratio of the nanowire suspensions were *** a saturated magnetic flux density,the yield stress was found to increase linearly up to an aspect ratio of 23(7.1μm long wires)at which time the yield stress reached a plateau of 3.7 kPa even as the aspect ratio was further *** a comparison,suspensions containing 4 vol.%1.6μm spherical cobalt particles only reached a maximum yield stress of 1.6 kPa.