有色金属科学与工程2018，Vol.9Issue(1)：77-79,104,4.DOI:10.13264/j.cnki.ysjskx.2018.01.013
Nd取代对Pr-Nd-Fe-B烧结磁体耐腐蚀性的影响
Effect of Nd Substitution for sintered Pr-Nd-Fe-B magnet corrosion resistance
摘要
Abstract
Effects of Nd substitution for sintered Pr-Nd-Fe-B magnets corrosion resistance were investigated, via mass loss of the magnets by HAST, and potentiodynamic polarization curves under different corrosive mediums. The result shows that the mass loss reduced, and the corrosion potential moved positively to different extent within the condition of 0.1 mol/L HCl,3.0 % NaOH and 3.5 % NaCl aqueous solution, after the rare-earth element Pr of the sintered Pr-Nd-Fe-B magnet completely been substituted, which indicates the better resistance against electrochemical corrosion. The microstructure of the magnet using Nd by SEM in comparison with the (Pr-Nd)one suggests that the grain boundaries becomes more clear and continuous,and the Nd-rich phas e at triple junctions is reduced. Through which the corrosion rate of the grain boundaries is slowed down,and as is effective to the corrosion resistance.关键词
烧结Pr-Nd-Fe-B磁体/耐腐蚀性/失重/动电位极化曲线Key words
Pr-Nd-Fe-B sintered magnet/corrosion resistance/mass loss/potentiodynamic polarization curves分类
信息技术与安全科学引用本文复制引用
戚植奇,喻玺,杜君峰,王亮亮,刘滨,庞再升,李家节,王公平..Nd取代对Pr-Nd-Fe-B烧结磁体耐腐蚀性的影响[J].有色金属科学与工程,2018,9(1):77-79,104,4.基金项目
江西省科技合作领域重点研发计划项目(20161BBH80010) （20161BBH80010）
