Research progress and development of strengthening-toughening methods for molybdenum alloys prepared by powder metallurgy

Abstract

Molybdenum (Mo), characterized by its high melting point, low thermal expansion coefficient, and excellent electrical and thermal conductivities, is widely considered an ideal metal material for applications in aerospace, nuclear fusion, electronics, and medical fields. Nevertheless, the major drawback of pure Mo is its significant brittleness, which restricts its practical utilization. This work presents a comprehensive review of the research progress on Mo alloys in recent years, covering preparation routes from composite powder preparation to advanced sintering technologies as well as performance evaluations (including mechanical properties and oxidation resistance). Additionally, it offers an outlook on the research prospects and development directions of Mo alloy composition design and preparation routes.