Abstract
IN the course of a study of thermal etching, some experiments were carried out on specimens cut from cold-rolled, high-purity silver sheet containing a number of uniformly distributed blow-holes. A flat, electrolytically polished surface was prepared on each specimen, which was then annealed for 19 hr. at 900° C. in oxygen-free nitrogen. Fig. 1 shows the appearance of a section through a specimen which has been subject to this treatment. The grain boundaries have been revealed in the section by thermal etching.
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References
Mackenzie, J. K., and Shuttleworth, R., Proc. Phys. Soc. 62B, 833 (1949).
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GREENOUGH, A. Grain Boundaries and Sintering. Nature 166, 904–905 (1950). https://doi.org/10.1038/166904a0
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DOI: https://doi.org/10.1038/166904a0
