Preparation method of iron-platinum-based target material blank

The preparation method comprises the following steps: 1) firstly, performing high-energy ball milling on pure platinum powder and pure iron powder to increase the surface defect degree of the pure platinum powder and the pure iron powder so as to be beneficial to improving the alloying process between iron and platinum in a sintering stage; (2) adding third component powder and iron platinum powder, and carrying out secondary homogenization ball milling, wherein the third component powder and the iron platinum powder are used as an isolating agent to generate iron platinum crystal grains which are completely isolated from each other in the sintering process; 3) carrying out hydrogen introduction reduction on the mixed powder to reduce the surface oxygen content of the mixed powder; and (4) controllable preparation of the microstructure of the iron-platinum target blank is achieved in a cold press molding and hot press combined mode. According to the method, the compactness of the iron-platinum-based target ma