Nd-Fe-B焼結磁石の材料設計と高性能化

概要

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The material design program has been developed for the Nd-Fe-B sintered magnets. This method enables to estimate the phase volume percent and magnetic properties. This program has been applied for the development of (BH)max=45MGOe with iHc=13kOe magnet and high energy product magnet. From the design of (BH)max=45MGOe magnet, the (BH)max=45.1MGOe has been obtained by the reasonable mass production process. In order to develop high energy product magnet, the behavior of crystal alignment has been studied for the compacting and sintering process. The high alignment (Br/Ms > 96%) has been obtained by increasing the applied field in the cavity as well as by reducing the magnetic agglomeration of powders and low pressure compaction. As a result, the (BH)max=53.2MGOe has been obtained.
社団法人粉体粉末冶金協会の論文