EFFECTS OF WC ADDITION ON MICROSTRUCTURE AND MAGNETIC PROPERTIES OF SINTERED Nd-Fe-B MAGNETS
WC对Nd—Fe—B烧结磁体的显微组织和磁性能的影响

The coercivity of sintered Nd-Fe-B magnets is enhanced by the addition of a small amount of WC and the highest one corresponds to an amount of 0.6% WC addition. But a higher amount of WC addition leads to the decrease in coercivity. The grain size decreases first and then increases with increasing the WC content. SEM observation revealed that W-Fe-B phase with colony-like shape appears at grain boundaries or in some matrix regions, and that the contents of C and W in the regions near to W-Fe-B phase are higher than other regions. Correspondent: SONG Xiaoping,(College of Materials Science, Xi'an Jiaotong University, Xi'an 710049)