Abstract
Using mixed powder compacts of Sm-(60.5-65.5)wto%Co composed of SmCo5 and 60wto%Sm-40wt %Co powders, the sintering characteristics for Sm-Co system were studied mainly by means of the dilatometric method, and also the maximum energy product (BH)max was investigated in relation to the added amount of 60wto%Sm-40wt%Co powder and the sintering temperature.
The results obtained were summarized as follows: The contracting phenomena due to the liquid phase sintering by the addition of 60wt%Sm-40wt%Co powder, appeared remarkably in the temperature range higher than 1100°C during heating process, and it was confirmed that both the shrinkage ratio and the sintered density ratio became maximum at about Sm-61.5wtooCo as the composition ratio and 1180°C as the sintering temperature. On the other hand, the composition ratio and the sintering temperature showing the maximum value of (BH), ax were found at about 62.5wt%Co and 1130°C, respectively, where the former shifted to higher Co content and the latter to lower temperature than the cases of sintered density-ratio, respectively.
