The paper investigates the influence of interstitial carbon and oxygen atoms on their diffusion along the <111>, <100> and <110> tilt grain boundaries in face-centered cubic nickel and silver. It is shown that in most cases, the impurity addition leads to the growth in the self-diffusion coefficient along the grain boundaries due to the crystal lattice distortion near the impurity atoms, thereby causing the additional lattice distortion and free volume along the grain boundaries. And the lower the initial free volume on the grain boundary, the stronger is the effect from impurities on the grain boundary diffusion. In this regard, the highest and lowest effects from the impurities are observed for the <110> and <100> tilt grain boundaries, respectively. It is found that the influence of interstitial carbon on the grain boundary diffusion is stronger than that of oxygen.

本文研究了间隙碳和氧原子在面心立方镍和银中沿<111>，<100>和<110>倾斜晶界扩散的影响。已经表明，在大多数情况下，由于杂质原子附近的晶格畸变，杂质的添加导致沿晶界的自扩散系数的增长，从而导致沿晶界的附加晶格畸变和自由体积。并且晶界上的初始自由体积越低，杂质对晶界扩散的影响越强。在这方面，分别对于<110>和<100>倾斜晶界观察到来自杂质的最高和最低影响。