金属学报  2006, Vol. 42 Issue (3): 225-233

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固体中的扩散应力研究

陈永翀

北京大学化学院应用化学系

Diffusion-induced Stresses

陈永翀 . 固体中的扩散应力研究[J]. 金属学报, 2006, 42(3): 225-233 .

摘要 参考文献 相关文章 Metrics 全文: PDF(418 KB)   摘要: 固体中原子的互扩散行为导致的应力应变现象越来越受到人们的重视。这种扩散应力不仅可以引起材料的宏观变形，而且可能使材料内部形成特殊的微观组织。本论文系统地阐述了固体中原子扩散与应力之间的相互作用问题，区别了应力扩散与扩散应力的概念，并通过流点体积生长率的推导，建立了互扩散区域内流点应力应变与原子扩散流之间的变量关系，提出描述固态互扩散区域内扩散应力与应变的一般理论。在此基础上，作者分析了固态反应周期层片型结构的形成机理和薄片扩散偶的扩散弯曲问题，并提供相应的理论解释。 关键词 ： 扩散偶,  互扩散生长,  周期层片型结构,  扩散应     Abstract：Recent experiments indicate that stresses induced by atomic interdiffusion in solids can not only result in the macro-distortion of materials, but also form some peculiar micro-structures in the materials. Considered that little has been known in a detailed way of the mechanisms of diffusion-induced stresses, the relationship of atomic diffusion and stresses in solids will be elucidated and the concepts of creep-induced diffusion and diffusion-induced stresses are clarified in this paper. Based on the volume growth rate of a flow point, an equation is obtained for the relationship of stresses of flow point and atomic diffusion fluxes and therefore a general theory is constructed to describe the phenomena of diffusion-induced stresses and strains, e.g. the bending of thin diffusion couples and the periodic layer formation during solid state reactions. Key words： diffusion couple    interdiffusion growth    periodic-layered structure    diffusion-induced stresses 收稿日期: 2005-06-07      ZTFLH:  TG111.6   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 陈永翀 44.8K 链接本文: https://www.ams.org.cn/CN/Y2006/V42/I3/225 [1] Chen Y C, Zhang Y G, Chen C Q. Mater Sci Eng, 2004; A368: 1 [2] Daruka I, Szabo I A, Beke D L, Cserhati Cs, Kodentsov A, van Loo F J J. Acta Mater, 1996; 44: 4981 [3] Szabo I A, Daruka I, Beke D L. Defect Diffus Forum, 1996; 129/130: 127 [4] Greer A L, Karpe N, Bottinger J. J Alloys Compd, 1993; 194: 199 [5] Bastin G F, Rieck G D. 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