高稳定磁流变液的制备和性能分析  

Preparation and properties of high stability magnetorheological fluid

作　　者：唐龙[1,2] 卢利平[1,2] 岳恩[1,2] 罗顺安[1,2] 赵光明[1,2] 张平[1,2] 唐锐[1,2] 张登友[1,2] 杨百炼[1,2] 

机构地区：[1]重庆材料研究院有限公司,重庆400707 [2]国家仪表功能材料工程技术研究中心,重庆400707

出　　处：《重庆大学学报（自然科学版）》2014年第3期41-46,共6页Journal of Chongqing University

基　　金：国家支撑计划项目(2012BAF06B04)

摘　　要：采用X—ray衍射、扫描电子显微镜及振动样品磁强计等表征手段，研究通过气体渗氮在羰基铁颗粒表面形成的氮化物薄层，分析了羰基铁颗粒氮化后的形貌、抗氧化性能和磁性能。将氮化后的羰基铁粉加入高分散性添加剂，用高速分散的方法制备了高稳定磁流变液，分析了该磁流变液的磁性能、流变性能和抗沉降性能，并研究了该磁流变液在器件应用中的稳定性。结果表明：采用该工艺制备的磁流变液的摩擦系数降低至0．054，3个月沉降〈10％，零场黏度≤1．0Pa·s，最大剪切应力≥60kPa，在20～125℃范围内，阻尼器阻尼力最大衰减率14．3％。氮化提高了磁流变液悬浮相的表面抗磨、耐蚀性能，改善了磁流变液抗沉降团聚稳定性。The effect of nitriding on the carbonyl iron powder is characterized by XRD, SEM and vibrating sample magnetometer. With the nitride iron powder, a MR fluid with the excellent performance has been prepared through adding in thixotropic agent of organobentonite and polymeric surfactant. The magnetic properties, rheological properties, antisedimentation and aggregation stability, temperature stability, tribology properties and damping properties of MR fluid has been studied. The properties are listed as follows： shear stresses is more than 60 kPa（B=0. 5 T） ,off state viscosity is less then 1. 0 Pa·s, and the three months settling rate is less than 10% and no hardening, easy redispersion. Temperature ranges from 20 to 125 ℃ ,and the maximum decay rate of the damping force is less then 14. 3%.

关 键 词：磁流变液 磁流变阻尼器 温度特性 可控流体 

分 类 号：TF125.8[冶金工程—粉末冶金]