Diffusion in Bimetal Vapor‐Solid Couples
Diffusion in Bimetal Vapor‐Solid Couples
复制标题
双金属气固偶中的扩散
DOI：
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发表时间：
1954
期刊：
影响因子：
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通讯作者：
L. Seigle
中科院分区：
文献类型：
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作者：
R. Balluffi;L. Seigle
几个二元系统中各个组分的固有扩散率已通过气固型扩散偶确定。在这种类型的耦合中，高蒸气压组分从气相扩散到最初在其表面上包含惰性标记的较低蒸气压板中。然后可以根据标记移动和扩散渗透曲线数据计算扩散率。建立了分析此类配对所需的方程。对阿尔法黄铜、铜-镍和银-金系统进行了研究。还观察了扩散期间的多边形化和垂直于扩散方向的尺寸变化。详细研究了仅在气相-固体银-金对中发生的孔隙形成，并与相应的夹层对中的孔隙形成进行了比较。讨论了此类对在扩散研究中的一般用途和局限性。
The intrinsic diffusivities of individual components in several binary systems have been determined with vapor‐solid type diffusion couples. In this type of couple a high vapor‐pressure component is diffused from the vapor phase into a slab of lower vapor pressure initially containing inert markers on its surface. Diffusivities may then be calculated from marker movement and diffusion‐penetration curve data. Equations necessary for analysis of such couples are developed.The alpha brass, copper‐nickel, and silver‐gold systems were investigated. Observations of polygonization during diffusion and dimensional changes normal to the diffusion direction were also made. Porosity formation, which occurred only in the vapor‐solid silver‐gold couples, was investigated in detail and was compared to porosity formation in corresponding sandwich couples. The general use and limitations of such couples in diffusion studies are discussed.