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通过建立界面扰动模型 ,推导了三元固态置换反应系界面稳定性的化学势梯度判据。结果表明 :如果扰动微区前沿速率控制元素的化学势梯度升高小于 2 0 .7% ,平面界面稳定长大 ,将形成层状结构 ;若大于 2 0 .7% ,平面界面不稳定长大 ,将形成束集型结构。计算了某一常见假设下棒状束集型结构的束集密度
By establishing the interfacial perturbation model, the chemical potential gradient criterion for the interfacial stability of the ternary solid state displacement reaction system is deduced. The results show that if the chemical potential gradient of the frontier rate control element increases less than 20.7% and the plane interface grows steadily, a layered structure will be formed; if it is more than 20.7%, the plane interface will not be stable and grow up , Will form a bundle-type structure. The cluster density of the rod-like cluster structure under some common assumption is calculated