What is the difference between tungsten-copper alloy and molybdenum-copper alloy?
First, different definitions
Tungsten copper alloy, known as copper tungsten or Tungsten copper in English, is an alloy material composed of tungsten and copper atoms, containing 10% to 50% copper and 30% to 95% tungsten.
Molybdenum copper alloy is a alloy material composed of molybdenum and copper atoms. It can replace tungsten copper alloy in many cases. According to the different chemical composition, molybdenum copper alloy brand can be divided into MoCu10, MoCu15, MoCu20, MoCu25, MoCu40, their total impurity content is less than 0.1%.
Two, the nature is different
Tungsten-copper alloy has the characteristics of both tungsten and copper, with good electrical and thermal conductivity, corrosion resistance, wear resistance and machining properties, etc., at 3000℃ above, the copper in the alloy will be liquefied and evaporated. Compared with tungsten copper, molybdenum copper has lower density and lighter weight, which is more suitable for some products with strict requirements on weight Pointers.
Molybdenum-copper alloy has the characteristics of both molybdenum and copper, and has the characteristics of non-magnetism, strong resistance to high temperature, high thermal conductivity, low adjustable coefficient of thermal expansion, excellent vacuum performance and mechanical workability. Molybdenum-copper is worse than tungsten-copper in heat resistance and wettability.
Three, the production process is different
The preparation methods of tungsten-copper alloy include powder metallurgy method, injection molding method, copper oxide powder method, tungsten skeleton penetration method, etc. Among them, the process flow of powder metallurgy to make tungsten-copper alloy is pulverizing - mixing - pressing - sintering and dissolving - cold processing.
The preparation methods of molybdenum-copper alloy include liquid phase sintering method and molybdenum skeleton fusion method. Liquid phase sintering method refers to the liquid phase sintering of molybdenum-copper powder after pressing and forming at the temperature of 1300-1500°C.
Four, different uses
Tungsten copper alloy is mainly used in high temperature resistant materials, electro machining electrodes, microelectronics materials, electrical alloys for high voltage switches, etc.
Molybdenum-copper alloy is suitable for the manufacture of military and civilian high power microelectronic devices.
