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烧结NdFeB永磁体在HNO₃+HF混合溶液中的腐蚀行为

Corrosion Behavior of Sintered NdFeB in HNO₃ and HF Mixing Solution

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【Author】 ZHAO Qing,YUAN Xue-tao,DU Nan (College of Material Science and Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034,China)

【机构】南昌航空工业学院材料学院；南昌航空工业学院材料学院南昌330034；南昌330034；

【摘要】通过SEM,EDS和E-t曲线、Tafel曲线、EIS(交流阻抗谱)对烧结NdFeB合金在HNO3+HF混合溶液中的腐蚀行为及其损伤形貌进行了较系统的研究。结果表明,烧结NdFeB在混酸中的腐蚀是基体相与富钕相的全面腐蚀,腐蚀后晶间富钕相仍呈网状分布于主相晶粒上。更多还原

【Abstract】 Corrosion behavior and damage micrography of sintered NdFeB in HNO₃ + HF mixing solution were studied by means of SEM, EDS, E-t curve, Tafel curve and EIS. The results show that the general corrosions in mixing solution mainly take place on the matrix phase and intergranular Nd-rich phase, after that the Nd-rich phase still netted-distributed on grain boundary.更多还原