Interdiffusion in Co Solid Solutions of Co-Al-Cr-Ni System at 1423 K
Interdiffusion in Co Solid Solutions of Co-Al-Cr-Ni System at 1423 K
复制标题
1423 K 下 Co-Al-Cr-Ni 系 Co 固溶体的相互扩散
DOI：
10.2320/matertrans.44.63
复制
发表时间：
2003
影响因子：
1.2
通讯作者：
Tomoshi Takahashi
中科院分区：
文献类型：
--
作者：
Y. Minamino;Yuichiro Koizumi;N. Tsuji;Toru Yamada;Tomoshi Takahashi
在1423 K下研究了含Al、Cr和Ni元素的钴固溶体中的二元、三元和四元互扩散实验。Al、Cr和Ni的直接互扩散系数均为正值。其中，Al的系数最大，Ni的系数最小。Al和Cr之间的间接互扩散系数为正，而Al（或Cr）和Ni之间的间接互扩散系数为负。在Co固溶体中加入Al元素大大促进了扩散，而Cr和Ni元素的加入对扩散的促进作用不大。从Co固溶体的固相线温度、元素在纯Co中的扩散系数和溶质元素间的相互作用参数等因素定量评价了元素的加入对互扩散的影响。互扩散系数的估算值与实验值吻合较好。
Binary, ternary and quaternary interdiffusion experiments have been investigated in cobalt solid solutions including Al, Cr, and Ni elements at 1423 K. The direct interdiffusion coefficients of Al, Cr and Ni are positive. Among them, the coefficients of Al are the largest, and those of Ni are the smallest. The indirect interdiffusion coefficients between Al and Cr are positive, but those between Al (or Cr) and Ni are negative. The addition of Al element to Co solid solution largely enhances diffusion but the addition of Cr and Ni elements slightly enhances diffusion. The effect of the addition of elements on interdiffusion are evaluated quantitatively from the factors related to the solidus temperature of Co solid solutions, the diffusivity of elements in pure Co and the interaction parameters between solute elements. The evaluated values of interdiffusion coefficients are in good agreement with the experimental ones.