Word Count : 238

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Diffusion in solids depends on both the atomic size of the diffusing species and the mechanism by which diffusion occurs. In the case of iron lattice, carbon atoms and nickel atoms exhibit different diffusion behaviors because they utilize distinct diffusion mechanisms. Carbon, being a much smaller atom compared to iron, diffuses primarily through the interstitial mechanism. In this process, ___ ____ ______ _________ ________ ____ ____ _______.
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