In its pure form, molybdenum is a silvery-grey metal with a melting point of 2,623 °C (4,753 °F). It hasa Mohs hardness of 5.5, and a standard atomic weight of 95.95 g/mol; Among the naturally discovered elements, only tantalum, osmium, rhenium, tungsten, and carbon have higher melting points than molybdenum.
Molybdenum and molybdenum alloys are refractory metal and alloys with a very high melting point (non-alloy 2623 °C) and a low thermal expansion coefficient.
Compared with pure molybdenum products, molybdenum rhenium and molybdenum rhenium alloys have advantages in rare earth molybdenum products and are widely used in metallurgy, machinery, petroleum, chemical, aviation, electronics and other fields. Among them, rare earth doped molybdenum is a new type of material that combines structure and function, and has received increasing attention.
Adding rare earth elements can not only improve the re-crystallization temperature and high temperature creep resistance of molybdenum, but also significantly reduce the plastic-brittle transition temperature of molybdenum, increase the ductility, and improve the room temperature brittleness and high temperature anti-sag ability of molybdenum.