Diffusion and segregation of silver in copper Σ5(310) grain boundary
Diffusion and segregation of silver in copper Σ5(310) grain boundary
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DOI：
10.1103/physrevb.85.144104
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发表时间：
2012-04-06
影响因子：
3.7
通讯作者：
Prokofjev, Sergei
中科院分区：
文献类型：
--
作者：
Divinski, Sergiy V.;Edelhoff, Henning;Prokofjev, Sergei
测量了在C和B两种动力学条件下，Ag-110m在CuSigma5(310)双晶中沿和垂直于[001]倾斜轴的晶界扩散。单晶界的晶界扩散系数D-GB是在C动力学区域和三重乘积P=S范围内确定的。达美航空。D-GB是在B区测量的(这里S和增量分别是偏析因子和扩散晶界宽度)。建立了晶界扩散的强各向异性，这种各向异性在826K以上消失，在这一点上，三重积P在较低温度下表现出与原本线性的Arrhenius依赖关系的向下偏差。这些结果证实了温度引起的晶界结构的无序转变。乘积S的各向异性。估计了Sigma 5(310)晶界的增量。
Grain boundary diffusion of Ag-110m in Cu Sigma 5(310) bicrystal is measured along and perpendicular to the [001] tilt axis in both C and B kinetic regimes after the common Harrison's classification. The grain boundary diffusion coefficients, D-gb, of the single grain boundary in a true dilute limit of solute concentration are determined in the C kinetic regime and the values of the triple products P = s . delta . D-gb are measured in the B regime (here s and delta are the segregation factor and the diffusional grain boundary width, respectively). A strong anisotropy of the grain boundary diffusion is established, which disappears above 826 K. It is the point at which the triple product P demonstrates a downward deviation from the otherwise linear Arrhenius dependence at lower temperatures. These results substantiate a temperature-induced disordering transition of the grain boundary structure. The anisotropy of the product s . delta for the Sigma 5(310) grain boundary is estimated.