NdFeB永磁合金的晶粒结构缺陷模型及矫顽力机制

Defect Models of Grain Structure and Coercivity Mechanism for NdFeB Permanent Magnetic Alloys

概述了ＮｄＦｅＢ类稀土永磁合金的晶粒结构及其缺陷模型，包括单变量连续变化模型，三变量突变模型和激活体积模型，介绍了基于不同结构缺陷模型的各种矫顽力理论（包括成核理论、钉扎理论、发动场理论和热激活理论），比较了他们的异同点。

The defect raodel of the grain structure for NdFeB permanent naagnetic al- loys b reviewed, which includes tbe oontinuous variation model of the single variable, the abrupt variation model of three variables and tbe activation volume model. The various coercivity theories based on the difTerent structure defect raodels (including the nucleatioa tbeory, the pinning theory, tbe starting field theory aod the activation tbeory) are intro- duoed and oompared with each other. The defect raodel of united structure is also discussed.