Lateral Growth Instabilities During Solid State Interface Reactions: Extension to Ternary Systems

9410454哈克尼，该程序检查在三元体系中不同材料之间的界面上的沉淀的初始阶段形成的沉淀物的形态稳定性。该程序的独特之处在于它侧重于横向生长不稳定性，这种不稳定发生在初始沉淀生长过程中，垂直于互扩散方向。提出了一个定量假说，用来预测第三种元素的加入如何影响界面反应产物的横向生长过程中的形态发展。三元效应的预测是三元相图等温段中的组成与溶液的斜率以及不同材料界面上的互扩散阻力程度的函数。对这一假设的关键实验检验是通过研究析出物的形态来进行的，因为析出物的成分和界面特征是以系统的方式变化的。这项资助的结果可能会影响重要的技术过程，如不同材料的扩散连接和/或衬底与金属薄膜的反应。***

9410454 Hackney The program examines the morphological stability of precipitates which form in the initial stages of precipitation at the interface between dissimilar materials in ternary systems. This program is unique in its focus on the lateral growth instabilities which occur during initial precipitate growth perpendicular to the direction of interdiffusion. A quantitative hypothesis has been developed which predicts how the addition of a third element affects morphological development during the lateral growth of interfacial reaction products. The prediction of the ternary effect is a function of the slope of the solvus with composition in an isothermal section of the ternary phase diagram and the degree of resistance to interdiffusion at the interface between the dissimilar materials. A critical experimental test of this hypothesis is to be carried out by studying precipitate morphology as the composition and interface characteristics are varied in a systematic manner. %%% The results of this grant could impact important processes in technology, such as diffusion bonding of different materials and/or reactions of substrates with thin metal films. ***