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

小哈克尼9410454 该程序检查在三元体系中不同材料之间的界面处沉淀的初始阶段形成的沉淀物的形态稳定性。 该计划是独特的，其重点是横向生长的不稳定性，发生在初始沉淀生长垂直于相互扩散的方向。 已经开发了一个定量的假设，预测如何添加第三个元素影响形态发展过程中的横向生长的界面反应产物。 三元效应的预测是在三元相图的等温部分中具有组合物的固溶线的斜率和在不同材料之间的界面处对相互扩散的抵抗程度的函数。 这一假设的一个关键的实验测试是通过研究沉淀物形态的组成和界面特性的变化，在一个系统的方式。 该资助的结果可能会影响技术中的重要过程，例如不同材料的扩散结合和/或基板与薄金属膜的反应。 ***

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. ***