研究了场激活下燃烧合成碳化钨,研究结果显示,只有当施加的场强超过临界值(1V·cm-1),燃烧波才能蔓延下去.燃烧产物的特性与场强有关,当场强增加时,X射线衍射圈中WC相的衍射峰强度增强,表明碳在钨中的扩散随场强的增强而增大.钨颗粒的粒径大小和样品初始相对密度对燃烧温度和燃烧波蔓延速率的影响研究表明,随着钨颗粒的缩小,燃烧温度和燃烧波蔓延速率变大,而燃烧温度和燃烧波蔓延速率的最大值出现在一个合适的相对密度处.
The activation of self-propagating combustion reactions in the W-C system was achieved by using an electric field. Self-propagating combustion in elemental
reactants with the composition corresponding to WC can be activated only when the imposed field is above the threshold value of 1V·cm-1. The
nature of the combustion products depends on the field strength. The strength of diffraction peak of WC in XRD pattern increases with the increase of field
strength. The product is WC and W2C. The effects of tungsten particle sizes and the relative densities of the reactant compacts on the synthesis of tungsten carbide were also
investigated. The results show that the combustion temperature and combustion wave propagation velocity increase with the decrease of the size of tungsten
particles. At the optimum relative density, the combustion temperature and wave velocity attain the maximum value.
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