Diffusion und Kirkendall-Effekt in Kupfer-Nickel-Legierungen

Heumann, Theo; Grundhoff, K.-J.

doi:10.1515/ijmr-1972-630402

Cited by 6 publications

(1 citation statement)

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“…In 1947, Smigelskas and Kirkendall investigated the binary diffusion problem using a brass-copper diffusion couple and discovered the prevalent Kirkendall effect in the diffusion process [14]. Subsequently, Heumann and Grundhoff et al measured the intrinsic diffusion coefficients and interdiffusion coefficients in binary diffusion by diffusion couples [15]. However, the experiment with diffusion couples has disadvantages such as high time cost, high preparation cost, and inconvenient operation.…”

Section: Introductionmentioning

confidence: 99%

Thermal diffusion behavior of Fe/Cu/Ni multilayer coatings: a molecular dynamics study

Dai¹,

Huang²,

Wang³

et al. 2022

Modelling Simul. Mater. Sci. Eng.

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In this paper, the thermal diffusion behavior of Fe/Cu/Ni multilayer coatings was investigated by molecular dynamics. The results show that the Fe, Cu, and Ni elements can diffuse each other at 1250 K. Meanwhile, the intrinsic diffusion coefficients and interdiffusion coefficients of the Fe, Cu, and Ni were calculated. Besides, the diffusion mechanism for high melting-point elements of Fe and Ni at 1250K was analyzed in the paper. According to the simulation result, the Fe and Ni lattices were disturbed by the active Cu particles. Fe and Ni particles at higher energies may move out of their original positions and migrate into the Cu lattice randomly. Thus, the Fe and Ni elements were involved in the thermal diffusion. This can be confirmed by the decrease of the peak and the disappearance of the secondary peak in the RDF curves. However, the position of the curve peaks did not change. Thus, the lattice structure was still maintained during the whole diffusion process. The thermal diffusion of the three elements was carried out by particle substitution at the lattice positions. It was a solid phase diffusion process. Furthermore, there was a clear particle diffusion asymmetry at the original interface of the element. It was consistent with the diffusion asymmetry of diffusion-couple experiments. The primary reason for this diffusion asymmetry was the difference in the interaction potential of the three elements. This asymmetry was ultimately reflected in the intrinsic diffusion coefficient and the interdiffusion coefficient of each element. For the Fe-Cu-Ni ternary system, the largest diffusion coefficient was copper and the smallest was iron at 1250 K.

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Section: Introductionmentioning

confidence: 99%