粘结剂和温压工艺对粘结钕铁硼材料性能的影响  

Effects of binder and warm compaction process on the properties of bonded NdFeB magnets

作　　者：仲洪海[1] 倪狄 程敏 牟浩瀚 蒋阳[1] ZHONG Hong-hai;NI Di;CHENG Min;MU Hao-han;JIANG Yang(School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Chin)

机构地区：[1]合肥工业大学材料科学与工程学院

出　　处：《粉末冶金工业》2018年第3期61-66,共6页Powder Metallurgy Industry

摘　　要：为了获得高性能的粘结钕铁硼（NdFeB）磁体,对含偶联剂和粘结剂的钕铁硼粉体进行了温压压制实验。在70-110℃温度范围内,探索了温压压力、温度、粘结剂及其含量对粘结钕铁硼磁体的密度和性能影响。结果表明：含0.5%偶联剂和0.6%粘结剂（均为质量分数）的钕铁硼粉体的压制规律符合黄培云压制方程,压制模量为3.57 MPa,非线性指数为0.21;随着压力和温度的升高,粘结磁体的密度和最大磁能积先升高然后下降。当粘结剂含量大于1.0%（质量分数）后,磁体密度迅速下降;在相同的温度、压力和粘结剂含量下,加入半固体的E44粘结剂比加入E51和CYD粘结剂的磁体密度大。在温压温度为80℃条件下,获得了密度6.7 g/cm^3,磁能积104 kJ/m^3的粘结钕铁硼永磁材料。In order to obtain high-performance bonded NdFeB magnets,Nd Fe B powders containing coupling agent and binder were warm compacted. The influences of pressure,temperature,the kind and the content of binder on the density and performance of bonded Nd Fe B magnets were explored in the temperature range of 70-110 ℃.The results show that the relations between compaction pressure and green density of the Nd Fe B powder with 0.5% coupling agent blending 0.6% binder（mass percent）is in accordance with HUANG Pei-yun＇s equation with the compaction module of 3.57 MPa and the nonlinear exponent of 0.21. With the increase of temperature and pressure,the density and the maximum magnetic energy product of the bonded Nd Fe B magnets increase first and then decrease. The density of magnets decreases rapidly when the mass percent of the binder exceeds 1.0%. Using the identical temperature,pressure and the content of binders,the magnets with the addition of semisolid E44 binder has higher density than those with E51 and CYD. The bonded Nd Fe B permanent magnet material with the density of 6.7 g/cm^3 and the maximum magnetic energy products of 104 kJ/m^3 is obtained at 80 ℃.

关 键 词：温压工艺 粘结钕铁硼 最大磁能积 

分 类 号：TM273[一般工业技术—材料科学与工程]