热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2009年
20期
65-67,75
,共4页
纳米复合%NdFeB%永磁体%磁性能%温度稳定性
納米複閤%NdFeB%永磁體%磁性能%溫度穩定性
납미복합%NdFeB%영자체%자성능%온도은정성
nano-composite%NdFcB%permanent magnet%magnetic properties%temperature stability
利用熔体快淬法和品化退火工艺制备了纳米晶复合NdFeB永磁粘结磁体,研究了添加Zr元素对磁体室温磁性能和温度稳定性的影响.结果表明,添加3at%Zr元素能明显提高磁体的矫顽力和最大磁能积.在淬速18 m/s、退火温度640℃下制备的Nd_(9.5_Fe_(76)Co_5Zr_3B_(6.5)粘结磁体具有良好的综合磁性能,即剩磁为0.71 T,矫顽力为652 kA/m,最大磁能积为80kJ/m~3.适量添加Zr元素可以有效改善磁体的温度稳定性,在20～150℃,纳米晶复合Nd_95Fe_(76)Co_5Zr_3B_(6.5)粘结磁体的剩磁温度系数为-0.13%/℃,内禀矫顽力温度系数为-0.35%/℃;在150℃时效100h后,不可逆磁通损失为-4.50%.
利用鎔體快淬法和品化退火工藝製備瞭納米晶複閤NdFeB永磁粘結磁體,研究瞭添加Zr元素對磁體室溫磁性能和溫度穩定性的影響.結果錶明,添加3at%Zr元素能明顯提高磁體的矯頑力和最大磁能積.在淬速18 m/s、退火溫度640℃下製備的Nd_(9.5_Fe_(76)Co_5Zr_3B_(6.5)粘結磁體具有良好的綜閤磁性能,即剩磁為0.71 T,矯頑力為652 kA/m,最大磁能積為80kJ/m~3.適量添加Zr元素可以有效改善磁體的溫度穩定性,在20～150℃,納米晶複閤Nd_95Fe_(76)Co_5Zr_3B_(6.5)粘結磁體的剩磁溫度繫數為-0.13%/℃,內稟矯頑力溫度繫數為-0.35%/℃;在150℃時效100h後,不可逆磁通損失為-4.50%.
이용용체쾌쉬법화품화퇴화공예제비료납미정복합NdFeB영자점결자체,연구료첨가Zr원소대자체실온자성능화온도은정성적영향.결과표명,첨가3at%Zr원소능명현제고자체적교완력화최대자능적.재쉬속18 m/s、퇴화온도640℃하제비적Nd_(9.5_Fe_(76)Co_5Zr_3B_(6.5)점결자체구유량호적종합자성능,즉잉자위0.71 T,교완력위652 kA/m,최대자능적위80kJ/m~3.괄량첨가Zr원소가이유효개선자체적온도은정성,재20～150℃,납미정복합Nd_95Fe_(76)Co_5Zr_3B_(6.5)점결자체적잉자온도계수위-0.13%/℃,내품교완력온도계수위-0.35%/℃;재150℃시효100h후,불가역자통손실위-4.50%.
The influence of Zr addition on magnetic properties and temperature stability of nano-composite NdFeB bonded magnets were investigated. The results show that room temperature magnetic properties are remarkably improved by the additon of Zr. The optimal magnetic properties of J_r=0.71 T,_i H_c=652 kA/m and (BH)_(max)=80 kJ/m~3 are obtained for 3at% addition of Zr element. Proper additions of Zr can improve the temperature stability of magnet. The temperature coefficient of remanence and coercivity of nano-composites Nd_(9.5)Fe_(76)Co_5Zr_3B_(6.5) bonded magnets is -0.13%/℃ and -0.35%/℃, respectively, at 20～ 150℃. The irreversible loss can reach -4.5%, when aging at 150℃ for 100 h.
