Molybdenum Metal And Molybdenum-Based Alloys

Molybdenum metal is usually produced using powder metallurgy techniques. Molybdenum powder is compacted using hydraulic technology and sintered at a temperature of about 2100°C. Hot-working in the temperature range of 870-1260°C. Volatile oxides are formed when molybdenum is heated in the air above about 600°C, so high-temperature applications are limited to non-oxidizing or vacuum environments.

Molybdenum powder spherical agglomeration (lace shape), with a nickel-chromium alloy solid sphere in the middle adhering to the molybdenum powder.

Molybdenum-based alloys exhibit excellent strength and mechanical stability at elevated temperatures (up to 1900°C). Their high ductility, good toughness, and high resistance to defects and brittle fractures are superior to ceramics.

1. The unique properties of molybdenum alloys can be used in many fields, such as:

1) High-temperature heating elements, radiation protection devices, extrusion parts, forging dies, etc.;

2) Rotating X-ray anodes for clinical diagnosis;

3) Glass melting furnace electrodes and parts resistant to molten glass;

4) Heat sinks for semiconductor chip mounting, whose thermal expansion properties match that of silicon;

5) sputtered layers of only a few angstroms (10-7 mm) thick for gates and interconnects on integrated circuit chips;

6) The spray coating of automobile piston rings and machine parts can reduce friction and improve wear resistance

2. Molybdenum metal is used in the hot zone of the high-temperature furnace

1) After adding many other metal alloying elements, molybdenum has special uses:

2) Molybdenum-tungsten alloy is famous for its excellent resistance to molten zinc;

3) Molybdenum-clad copper can be used for electronic circuit boards with low expansion rate and high conductivity;

4) Molybdenum-25% rhenium alloys are used in rocket engine components and liquid metal heat exchangers, which must be ductile at room temperature.