Interdiffusion and solid solution strengthening in Ni-Co-Pt and Ni-Co-Fe ternary systems
Interdiffusion and solid solution strengthening in Ni-Co-Pt and Ni-Co-Fe ternary systems
复制标题
DOI：
10.1080/14786435.2013.765987
复制
发表时间：
2013-06-01
影响因子：
1.6
通讯作者：
Paul, A.
中科院分区：
文献类型：
--
作者：
Divya, V. D.;Ramamurty, U.;Paul, A.
通过二元合金与第三元素的耦合，在1200℃的Co-Ni-Pt系和1150℃的Co-Ni-Fe系中进行了扩散偶实验。在Co-Ni-Pt系富铂角处，Co和Ni均呈上行扩散，而在Co-Ni-Fe系中，Co则呈上行扩散。主互扩散系数和交叉互扩散系数分别在两个独立扩散剖面的交点处计算。在两个体系中，主要互扩散系数在整个组成范围内均为正值，并且在不同区域的互扩散系数均为正值和负值。通过在两个系统的扩散偶上进行纳米压痕测量的硬度在中间成分处显示出较高的值。
Diffusion couple experiments are conducted in Co-Ni-Pt system at 1200 degrees C and in Co-Ni-Fe system at 1150 degrees C, by coupling binary alloys with the third element. Uphill diffusion is observed for both Co and Ni in Pt rich corner of the Co-Ni-Pt system, whereas in the Co-Ni-Fe system, it is observed for Co. Main and cross interdiffusion coefficients are calculated at the composition of intersection of two independent diffusion profiles. In both the systems, the main interdiffusion coefficients are positive over the whole composition range and the cross interdiffusion coefficients show both positive and negative values at different regions. Hardness measured by performing the nanoindentations on diffusion couples of both the systems shows the higher values at intermediate compositions.