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

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...

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Bibliographic Details
Published in:Surface investigation, x-ray, synchrotron and neutron techniques x-ray, synchrotron and neutron techniques, 2017-11, Vol.11 (6), p.1173-1176
Main Authors: Elekoeva, K. M., Korotkov, P. K., Kutuev, R. A., Manukyants, A. R., Ponegev, M. Kh, Sozaev, V. A., Shermetov, A. Kh
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Crystallization
Electron microscopy
Grain boundaries
Materials Science
Nickel
Plates (structural members)
Scanning electron microscopy
Sessile drop method
Substrates
Surfaces and Interfaces
Thin Films
Vacuum chambers
Wettability
Wetting
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Summary: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.
ISSN:1027-4510
1819-7094
DOI:10.1134/S1027451017060064