Gel Prepared Tungsten Copper Alloy Powder

In this paper, the sol-gel method combined with a spray-drying method series of ultra-fine tungsten copper composite powder, the powder through the different composition, size and other performance standards, different green powder sintering behavior under liquid phase conditions research and analysis by testing the sintered microstructure and physical and mechanical, thermal, electrical properties, the influence of the preparation method and process conditions on the powder properties and the final W-Cu composite material properties, so as to prepare a high density of W-Cu composites were useful to explore and try.

By powder on microstructure and properties of comparative analysis, we found the following preparation process using tungsten-copper composite powder series ideal performance: After paratungstic acid and copper nitrate according to a certain percentage of a beaker with a good, adding a certain amount of citric acid After stirring at room temperature at 30 ℃ dissolve, then add a certain amount of stearic acid as a surfactant, was heated to 80 ℃ stirring, when it becomes a gel by spray drying tower and dried: and then calcined at 600 ℃ 4 hours ; then reduced at 800 ℃. The powder series have in common is: particle size were between 0.1um-1um: powder particle shape is more structured, are spherical shape; powder due to the small particle size, surface activity, leading to more serious powder agglomeration.