Method for preparing iron-platinum target blank through plasma ball milling and hot pressing sintering

Abstract

The invention discloses a method for preparing an iron-platinum target blank through plasma ball milling and hot pressing sintering, and belongs to the technical field of iron-platinum targets. Pure platinum powder and pure iron powder are mixed by adopting a discharge plasma ball milling method, cold field discharge plasmas are introduced into mechanical ball milling, high-energy plasmas and vibration ball milling generate a synergistic effect, powder alloying is promoted, powder activity is activated, the iron platinum powder forms L10-phase iron platinum alloy under the action of the plasmas, and the L10-phase iron platinum alloy is obtained. And then the L10-phase iron-platinum alloy is placed in a graphite mold to be subjected to vacuum hot pressing sintering densification, and the L10-phase iron-platinum target material with high magnetocrystalline anisotropy and good storage performance is prepared. According to the method, the compactness and the magnetic storage performance of the iron-platinum target material blank are improved, the oxygen content is reduced, the controllability of the microstructure is achieved, and the service performance of the prepared iron-platinum target material is improved.

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