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1前言提高烧结钕铁硼永磁体的磁性能，改善其使用性能，一直是磁性材料研究者和制造者追求的目标。关于高磁能积磁体的研究较多，也得到了某些应用，提高矫顽力方面的研究也不少，但研究进展缓慢。决定矫顽力大小的因素及其形成机理比较复杂，目前公认的说法有形核机理和钉扎机
1 Introduction Increasing the magnetic properties of sintered NdFeB magnets to improve their serviceability has been the goal pursued by researchers and manufacturers of magnetic materials. There are many researches on high-energy-product magnets and some applications have also been obtained. There are also many studies on improving the coercive force, but the research progress is slow. Factors that determine the size of coercivity and its formation mechanism is more complicated, the current accepted theory of tangible nuclear mechanism and pinning machine