Surface Copper Plating on Tungsten Powder and Its Action
Tungsten has a high melting point, high density, high hardness, saturated vapor pressure, low coefficient of thermal expansion and other characteristics. Copper has high thermal conductivity properties, tungsten copper alloy combination is made known to all the materials in aerospace and military fields. The traditional preparation of tungsten copper alloy mainly adopts the method of mechanical mixing, forming and sintering of tungsten powder and copper powder, or using infiltration process. The method is relatively simple, but there are some defects, because of the great difference between tungsten and copper, tungsten and copper can only form pseudo alloy shape, and it is difficult to achieve uniform distribution of tungsten and copper in the interior, resulting in lower or unstable properties. With the development of Aeronautics and Astronautics and military industry, the demand for tungsten copper exothermic sweating material is higher and higher, Chinese scholars created a po...