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The influence of carbon on the interdiffusion of Mo and Ni

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Abstract

Experiments are carried out with Ni samples containing different amounts of carbon. The temperature range used is 800 to 1295°. In the beginning of the diffusion process a layer with a two-phase character is formed, for a high carbon content(i.e., 0.4 wt pct) at all temperatures and for a low carbon content (0.06 wt pct) below 1200°. The layer consists of the phases Mo2C and an Ŋ-carbide Mo54Ni30C18. Above 1000° this Ŋ-carbide is present also as a single-phase layer adjacent to this two-phase layer. After an incubation time a layer consisting of another Ŋ-carbide Mo6M6C is formed in the couples; this has a homogeneity range of only 0.5 at. pct Ni. There exists an intricate relationship between the two-phase layer and the layers of the pure Ŋ-carbides. After a very long annealing time at 1200°, σ-MoNi appears as a part of the Mo6Ni6C layer.

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Authors and Affiliations

  1. University of Technology, Eindhoven, Netherlands

    C. P. Heijwegen (Scientist, Laboratory for Physical Chemistry) & G. D. Rieck (Professor in Physical Chemistry)

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  1. C. P. Heijwegen
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  2. G. D. Rieck
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Heijwegen, C.P., Rieck, G.D. The influence of carbon on the interdiffusion of Mo and Ni. Metall Trans 4, 2159–2167 (1973). https://doi.org/10.1007/BF02643282

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  • DOI: https://doi.org/10.1007/BF02643282

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