Tungsten Alloys
Tungsten heavy alloys are ideal for high density applications or for use in radiation shielding. Heavy metal tungsten alloys are 90% to 97% pure tungsten in a matrix of nickel and copper or nickel and iron. The addition of these alloying elements improves both the ductility and machinability of these alloys over non-alloyed tungsten.
- Tungsten Alloy W90
- Tungsten Alloy W93
- Tungsten Alloy W95
- Tungsten Alloy W97
- Tungsten Alloy 90-7-3
- Tungsten Alloy 90-6-4
- Tungsten Copper 80W20Cu
- Tungsten Copper 75W25Cu
- Tungsten Copper 70W30Cu
Tungsten applications:
- Directly heated cathodes or heater coils for indirectly heated cathodes in cathode ray tubes for TV sets or computer displays, X-ray tubes, electron tubes, klystrons, magnetrons for microwave ovens;
- Thoria or rare earth oxide alloyed rod electrodes for inert gas welding (TIG welding electrodes), as well as High Intensity Discharge (HID) lamps;
- Tungsten disks for substrate of high power semiconductor rectifying devices;
- Sintered tungsten-copper or tungsten-silver electrical contacts for high-voltage breakers
- High temperature furnace parts such as tungsten heating coils, reflectors and structural material
- Calcium and/or magnesium tungstate is the phosphor in intensifying screens used with the X-ray photo films. These phosphors convert X-rays into visible (blue) light, resulting in a smaller X-ray charge for the patient
- Ultra high purity tungsten, tungsten silicide and tungsten-titanium PVD sputtering targets are used in VLSI and ULSI DRAM chip technology. A W-Ti layer on a wafer acts as a diffusion barrier, while W and WSi layers function as electrical conductor materials.
- In liquid crystal display (LCD) technology, ultra high purity molybdenum-tungsten alloy targets are now used instead of molybdenum-tantalum, resulting in improved definition of LCD panels.