Abstract
LANGMUIR1, when studying the thermionic emission of filaments for electronic valves, reported that the diffusion of thorium in tungsten may be a hundred times faster along the grain boundaries than through the grain itself. Van Liempt2 and Zwikker3, respectively, gave similar results for molybdenum and carbon in tungsten. Mehl4 stated that copper diffused preferentially along the grain boundaries of aluminium, but that there was no detectable preferential grain-boundary diffusion of carbon, nitrogen or hydrogen in iron. Also Seith and Keil5 were unable to detect any grain-size effect in the self-diffusion of lead. Evidence is given in this communication showing that copper diffuses preferentially along the grain boundaries of nickel.
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References
Langmuir, I., J. Frank. Inst., 217, 543 (1934).
Van Liempt, J. A. M., Rec. trav. chim., 51, 114 (1932).
Zwikker, C., Physica, 7, 189 (1927).
Mehl, R. F., Trans. Amer. Inst. Mining and Metallurgical Eng., 122, 11 (1936).
Seith, W., and Keil, C. A., Z. Metallkunde, 25, 104 (1933).
Beck, P. A., Sperry, P. R., and Hu, H., J. App. Phys., 21, 420 (1950).
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BARNES, R. Diffusion of Copper along the Grain Boundaries of Nickel. Nature 166, 1032–1033 (1950). https://doi.org/10.1038/1661032a0
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DOI: https://doi.org/10.1038/1661032a0
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