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Characteristics of a material is to determine what the material is likely to be an important basis for the field of application and, therefore, in discussing the development and application of molybdenum-copper materials must know and understand the characteristics of molybdenum copper material. 

 

Molybdenum and tungsten copper material, like copper material in the organization is false alloy phase consisting of two immiscible metals. Therefore, this material should be composed of both the characteristics of both metals, and can learn from each other, to get a good overall performance. Tungsten copper material has been more commonly used as an electrical contact material, EDM electrodes and aerospace and other high-temperature materials, its performance has been known, so when the discussion molybdenum copper material, discussed with reference to the material properties of tungsten and copper. 

 

1. high thermal conductivity electrical 

Tungsten and molybdenum, in addition to the metal, gold, silver, copper, high-conductive metal, the thermal conductivity and good conductive element, and further addition of high thermal conductivity of electrically conductive metal of copper and copper tungsten, molybdenum copper material having a high electric thermal conductivity. 

 

2. the low coefficient of thermal expansion can be adjusted 

High coefficient of thermal expansion of copper, and the coefficient of thermal expansion of tungsten and molybdenum is low and therefore, can be combined into a lower coefficient of thermal expansion of the components according to the different needs, so that they can be a thermal expansion coefficient matching combination with other materials, to avoid thermal stresses due to thermal expansion coefficient difference is too large and cause damage. 

 

3.special high-temperature performance 

Tungsten and molybdenum-based refractory metal (refractory metal), respectively, having a melting point 3400 ℃ and 2615 ℃, and the melting point of copper is only 1083 ℃. Copper and copper tungsten, molybdenum material at normal temperature and the temperature, both good strength, but also a certain plasticity, and when a high temperature exceeding the melting point of copper, copper-containing material can be liquefied by heat absorbing evaporation of a cooling effect (transpiration cooling), it can be used as high-temperature materials for special purposes, such as drug refractory nozzle throat combustion temperature, electrical arcing contacts under high temperature and so on. 

 

4.non-magnetic 

Tungsten, molybdenum, copper and iron are non-magnetic metal, so that the composition of tungsten copper, molybdenum copper are non-magnetic material, which makes them possible under the action of a magnetic field in a variety of conventional replaced with the elements of the iron group various alloy magnetic. 

 

5.low gas content and good vacuum performance 

Both tungsten, molybdenum or copper oxides can easily restore their N2, H2, C and other impurities can easily be removed under vacuum to maintain a very low outgassing performance with good vacuum. 

 

6.good workability 

Pure tungsten, pure molybdenum metal itself due to the high hardness and brittleness, is difficult to be machined, especially processed into complex shapes, granular components of low efficiency, waste and more. Copper and molybdenum and tungsten, copper material, the copper was added to reduce the hardness, ductility increases, so beneficial machining, processing means may take various processed into any complex shape components. 

 

7.compare copper and molybdenum copper 

Tungsten, molybdenum higher than the melting point, density ratio of molybdenum, tungsten and copper and therefore more suitable for use at higher temperatures can also be applied as a high density material. Due to the relatively low density and molybdenum, the use of copper can reduce part weight of molybdenum, which for the aerospace and instrumentation requirements when lightweight favorable as possible.

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