Abstract
Influence of the addition Fe-P powder on the AC magnetic property was studied on the sintered 12.5 percent chromium iron magnetic alloy. The DC magnetic property was highest at 0.6 percent addition. On the contrary, the highest AC magnetic property was attained at 0.8 percent addition. The DC magnetic property increased with the sintered density, but the AC magnetic property indicated the change as a decrease after an increase. An increase of the resistivity owing to the solid solution and the little remains on the addition up to 0.8 percent Fe-P causes an improvement of the AC magnetic property. However, an over addition above 0.8 percent causes an increase of the property and a decrease of the AC magnetic property in spite of an increase of the resistivity. These changes in the properties may be explained as the phenomena with the solid solution to the matrix caused by the liquid sintering under the 0.6 percent and the remaining of Fe-P to the grain boundary caused above the 0.8 percent.
