摘要
详细研究了用快淬钕铁硼制备粘结磁体的工艺和工艺因素对它的机械、电学、磁学性能的影响。结果表明，运用数种粘结剂均能获得很好的结果，粘结剂的含量应在一个合适的范围；为防止固化过程中的氧化，应采用惰性气氛，氧化后磁体出现α－Ｆｅ相；随成形压力的增大，剩余磁化强度和磁能积增大；ＭＱ粉末的居里温度为３６０℃，粉末和粘结磁体的热稳定性都很好，剩磁温度系数αＢ（从室温到１２０℃）＝０．１１％，开路磁通不可逆损失η（从室温到１５０℃）＜５％，工作温度ＴＷ＞１５０℃。最优粘结磁体性能如下：密度ρ＝（６．０－６．４）ｇ／ｃｍ３，剩磁Ｂｒ＝７４００×１０－４Ｔ，内禀矫顽力ｉＨｃ＝７９．６×（８８００～９５００）Ａ／ｍ，最大磁能积（ＢＨ）ｍａｘ＝１１×７．９６×１０３Ｊ／ｍ３。此类粘结磁体的矫顽力是钉扎模型。
The technique to prepare the bonded magnet from rapid quenched Nd-Fe-B and the influence of the technique factors on its mechanic, electric and magnetic performances have been studied in detail It has been shown that several different binders can be used to get good results, but the contents of them should be in proper range Inert gas should be used to prevent magnet from oxidizing during solidification Oxidization makes α-Fe phase appear Increasing with forming pressure, residual magnetization and energy product get greater Curie temperature of MQ powder is 360℃ Thermal stability of powder and bonded magnet are good temperature coefficient of residual magnetization α Br (from room temperature to 120℃)=0 11%,irreversible lost of magnetic flux in open circuit η(from room temperature to 150℃)<5% and its working temperature T W >150℃ The best bonded magnet possesses the following properties: density ρ=(6 0～6 4) g/cm 3 , B r =7400×10 -4 T, i H c=79 6×(8800～9500)A/m, ( BH ) max ≈11×7 96×10 3 J/m 3 The coercivity mechanism of this kind of bonded magnet is a pinning model
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
1997年第4期30-35,共6页
Rare Metal Materials and Engineering
