本项目从烧结钕铁硼基体相的微观结构，富钕晶界相的化学特性和分布状态以及晶界相优化等方面出发，结合热力学统计理论和电化学腐蚀理论，对低镝高耐蚀烧结Nd-Fe-B磁体的磁性能稳定性以及在模拟服役环境中的失效行为展开系统研究。采用目前先进的速凝鳞片技术和改进的双相合金方法，研制出具有低镝、高耐蚀兼具优异磁性能的烧结Nd-Fe-B磁体，并提出该类材料在极端服役条件下的加速寿命模型，阐明失效机理，为预测低镝高耐蚀烧结钕铁硼磁体的长时间使用寿命提供理论依据。研究成果对赣南地区钕铁硼生产厂家提高产品性能和降低制造成本具有重要的指导意义。

Based on sintered Nd-Fe-B microstructure of matrix phase, distribution and chemical property of grain boundary Nd-rich phase and optimization of them，combined with thermodynamical statistical and metallic corrosive theory，magnetic stability and corrosion mechanism of low weight loss sintered permanent magnets in different simulated service climates will be investigated systematically in this project.Both low weight loss and outstanding magnetic performance of sintered Nd-Fe-B magnets will be fabricated through advanced strip casting technology and improved double alloy method.Then we try to propose a accelerated life model and failure mechanism of such materials in extreme service conditions.The results may provide a kind of theoretical basis for predicting the long life of low weightless sintered permanent magnets.All these research results have very important guiding significance to improve product performance and reduce manufacturing costs for Gannan Nd-Fe-B fabricator.