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Polytherms of the Wetting Angles of Pb-Ni (0.3 at %) Melt on Nickel Substrates

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Polytherms of the wetting angle of Pb-Ni (0.3 at %) melt on pressed nickel substrates and substrates cut from a plate of nickel of grade NP-2 are studied in the temperature range from the melting point to 850°C by the sessile drop method in a vacuum chamber with a residual pressure of 10-2 Pa. The wettability thresholds are found. The wetting of both pressed substrates and NP-2 nickel begins at a temperature of 500°C or higher. After crystallization, the morphology of the droplet surface and the zones near it is studied using scanning electron microscopy. Pb n Ni m intermetallides of pyramidal form are detected, and zones where the melt spreads along the grain boundaries followed by the crystallization and formation of fibrous structures are found.

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Correspondence to P. K. Korotkov.

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Original Russian Text © K.M. Elekoeva, P.K. Korotkov, R.A. Kutuev, A.R. Manukyants, M.Kh. Ponegev, V.A. Sozaev, A.Kh. Shermetov, 2017, published in Poverkhnost’, 2017, No. 12, pp. 62–65.

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Elekoeva, K.M., Korotkov, P.K., Kutuev, R.A. et al. Polytherms of the Wetting Angles of Pb-Ni (0.3 at %) Melt on Nickel Substrates. J. Surf. Investig. 11, 1173–1176 (2017).

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