CAJ | 학술논문

烧结钕铁硼永磁材料被发明以来,以其优越的磁性能得到了广泛的应用,目前成为永磁产业的支柱.但是其耐腐蚀性能差,大大限制了其使用范围.因此,近20多年来如何改善其抗腐蚀性能成为烧结钕铁硼材料生产和使用的重要问题.总结了烧结钕铁硼腐蚀失重的机制,制备低失重烧结钕铁硼的方法和工艺,对如何提高烧结钕铁硼磁体的耐腐蚀性,降低腐蚀失重进行了综述.从磁体成分设计和微观结构方面总结了几条提高烧结钕铁硼磁体耐蚀性的原则,其关键是对晶界相的成分和微观结构进行合理的控制.
소결녀철붕영자재료피발명이래,이기우월적자성능득도료엄범적응용,목전성위영자산업적지주.단시기내부식성능차,대대한제료기사용범위.인차,근20다년래여하개선기항부식성능성위소결녀철붕재료생산화사용적중요문제.총결료소결녀철붕부식실중적궤제,제비저실중소결녀철붕적방법화공예,대여하제고소결녀철붕자체적내부식성,강저부식실중진행료종술.종자체성분설계화미관결구방면총결료궤조제고소결녀철붕자체내식성적원칙,기관건시대정계상적성분화미관결구진행합리적공제.
Sintered NdFeB magnets were applied widely because of their excellent magnetic performance.At present.NdFeB magnets were the key materials in permanent magnet industry.Their poor corrosion resistance,however,was a major impediment for application.So,how to improve corrosion resistance was a key point for sintered NdFeB manufacture and application.The corrosion weight loss mechanism of sintered NdFeB magnets and the process for producing low weight loss of sintered NdFeB magnets were summarized.An overview how to improve corrosion resistance and reducing weight loss was outlined.It was found that composition and microstructure control of grain boundaries phase Was a key point for low weight loss sintered NdFeB nmgnets.