CAJ | 학술논문

采取物理气相沉积(PVD)对烧结NdFeB磁体表面进行镀Al处理，分析了PVD Al镀层的耐高温特性。样品经200℃×5h处理后，Al镀层抗盐雾（5%NaCl，连续喷雾）腐蚀性能由原来的48h下降到22.5h，但抗高压高湿（121℃，100%湿度，2个大气压）性能不变；高温处理后的样品在经120℃×12h、-40℃×12h高低温循环冲击3次后Al镀层没有任何变化；高温处理前后样品镀层结合力基本一致，分别为16.89MPa，16.73MPa。结果表明PVD Al镀层性能不仅超过一般单电镀层的性能，且具有更好的耐高温特性，而且采用PVD镀Al不会导致磁性能下降。
채취물리기상침적(PVD)대소결NdFeB자체표면진행도Al처리，분석료PVD Al도층적내고온특성。양품경200℃×5h처리후，Al도층항염무（5%NaCl，련속분무）부식성능유원래적48h하강도22.5h，단항고압고습（121℃，100%습도，2개대기압）성능불변；고온처리후적양품재경120℃×12h、-40℃×12h고저온순배충격3차후Al도층몰유임하변화；고온처리전후양품도층결합력기본일치，분별위16.89MPa，16.73MPa。결과표명PVD Al도층성능불부초과일반단전도층적성능，차구유경호적내고온특성，이차채용PVD도Al불회도치자성능하강。
Aluminum coating for sintered NdFeB magnets were prepared by physical vapor deposition. The high temperature resist characteristic of the Al coating was investigated. After 200℃×5h heat treatment, the Al coating corrosion resist quality decline from 48h to 22.5h in the 5%NaCl salt spray condition. But the behavior of high temperature and high humidity resistance was the same for the condition of 100%humidity and 2 atm. The Al coating that after high temperature heat treatment has no change in condition of 3-time of 120℃×12h, -40℃×12h high-low temperature cycles. The adherent force of the Al coating of samples before and after heat treatment were 16.89Mpa and 16.73MPa, respectively. The results show that Al coating by physical vapor deposition not only exhbits better performance of corrosion resist than electrodeposited single coating, but also has better high temperature resistance and unchanged magnetic property.