场激活加压燃烧合成碳化钨

Field-activated Pressure-assisted Combustion Synthesis of Tungsten Carbides under Electric Field

采用不同钨碳摩尔比例 ,即W +1.0C、W +1.1C、W +1.2C和W +1.3C ,利用场激活加压燃烧合成技术制备了碳化钨材料 ,测量了合成反应前后样品的收缩百分比 ,研究了温度、反应物组成和不同碳源对产物组成、密度和维氏硬度的影响 ,结果表明 ,最终产物的相对密度在 81.1%和 89.9%之间 ,样品的维氏硬度介于 4 2 3和 731kg·mm- 2 之间。

FAPACS process, which combines the simultaneous synthesis and densification of materials, was utilized to produce tungsten carbides material from tungsten and carbon powders with different mole ratios between them, i.e. W+1.0C, W+1.1C, W+ 1.2 C and W+1.3C. The shrinkages after the synthesis reaction were measured. The effects of the temperature, the reactant compositions and different carbon sources on the product compositions, densities and Vickers hardness were investigated. The end-product relative densities ranged from 81.1% to 89.9%. Vickers hardness measurements on the dense samples gave values ranging from 731kg·mm -2 to 423kg·mm -2 .