copper forms a continuous matrix in the sintered compact, and tungsten serves as a strengthening framework. However, nickel activation and sintering will significantly reduce the electrical and thermal conductivity of the material, and the introduction of impurities in mechanical alloying will also reduce the material's conductivity. Because the moisture of molybdenum copper is worse than that of tungsten copper, especially when preparing low copper content molybdenum copper, the fine density of the material after infiltration is low, resulting in the material's air tightness, electrical conductivity, and thermal conductivity can not meet the requirements.
The high-swelling component is limited by the second component in the surroundings, and the powder is sintered at a lower temperature and humidity. According to reports, the use of very fine powder can improve the sintering function and refinement, so that it reaches more than 99%.
Use is restricted. Injection molding method High-density tungsten alloy is made by injection molding method.52 microns and tungsten powder with a particle size of 515 microns, and then mix in 25% and 30% organic adhesive binder ( Such as white wax or polymethyl vinegar) injection molding, using steam cleaning and irradiation to remove the adhesive, sintering in the middle, to obtain high-density tungsten alloy.
Although the heat resistance function is not as good as tungsten-copper, it is better than some heat-resistant materials, Copper Tape For Heat Exchanger so the use prospect is better. The manufacturing method is to mix nickel powder, copper tungsten powder or iron powder with a uniform particle size of 15 microns with tungsten powder with a particle size of 0.. The material prepared by this method has poor uniformity, there are more closed spaces, and the fine density is generally less than 98%, but after adding a small amount of nickel activation sintering method, mechanical alloying method or oxide for recovery method to prepare ultrafine, nano powder Can improve the sintering activity, and then improve the fine density of tungsten copper, molybdenum copper alloy