tungsten heavy alloys. heavy metal alloys are pseudo-alloys of tungsten with a nickel-iron or nickel-copper matrix. they are produced by powder metal and sintering processes. the most outstanding property of heavy metal alloys is the high density of 17-19 g/cm³.
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copper tungsten materials are often used for arcing contacts in medium to high voltage sulfur hexafluoride (sf 6) circuit breakers in environments that can reach temperatures above 20000k. the copper tungsten material's resistance to arc erosion can be increased by modifying the grain size and chemical composition.
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copper tungsten alloy is widely used in high-voltage switch 128kv sf6 circuit breaker wcu/cucr and high-voltage vacuum load switch (12kv 40.5kv 1000a) arrester high-pressure vacuum switch is small in size easy to maintain wide range of use can be in wet used in flammable explosive and corrosive environments.
copper tungsten alloy. consisting of pure tungsten (w) powder suspended in a matrix of copper (cu) these alloys are known for good thermal and electrical conductivity low thermal expansion and resistance to erosion from arcing. thus they are often used as electrical contacts particularly in high voltage applications.
recommended principally for welding or electro-brazing non-ferrous metals having relatively high electrical conductivity. cross wire welding or copper and brass wires and welding of copper wire braid to brass and bronze terminals are typical applications. generally special set-ups and procedures are required for this type of work.
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copper–tungsten (tungsten–copper cuw or wcu) is a mixture of copper and tungsten. as copper and tungsten are not mutually soluble the material is composed of distinct particles of one metal dispersed in a matrix of the other one. the microstructure is therefore rather a metal matrix composite instead of a true alloy.
consisting of pure tungsten (w) powder suspended in a matrix of copper (cu) these alloys are known for good thermal and electrical conductivity low thermal expansion and resistance to erosion from arcing. thus they are often used as electrical contacts particularly in high voltage applications.
tungsten copper (wcu) alloy is used in a wide range of applications including electrodes for resistance welding and electrode discharge machining (edm) medium and high voltage arcing contacts for electrical switchgear heat sinks for electronic devices furnace components high voltage discharge tubes balance weights dies for castings heat spreaders microwave carriers heating elements