Issues »  Volume 38, Issue 6

Influence of Surface Oxides on the Mechanism of Adhesion of a Coating at Plasma Spraying

S. V. Loskutov, A. V. Yershov, E. A. Zeleninа

Zaporizhzhya National Technical University, 64 Zhukovskogo Str., 69063 Zaporizhzhya, Ukraine

Received: 17.02.2016; final version - 16.04.2016. Download: PDF

As shown, the presence of the oxide layer on the treated surface during application of plasma coatings has a significant influence on the contact temperature and the mechanism of adhesion of the coating particles with the substrate surface. The process of contact heating of the layer of surface oxides is investigated. The possibility of adhesion of the coating particles with the layer of surface oxides while ensuring wetting due to the melting of the oxide layer is shown. The conditions of wet contact of the coating particles at unsteady heat transfer are determined depending on thermophysical properties of contact pair and temperatures of coating particles and substrate. The time of wetting for the measured thickness of the oxide layer is estimated depending on the temperature of coating particles.

Key words: adhesion strength, cohesive strength, wetting, chemical interaction, unsteady heat transfer.

URL: http://mfint.imp.kiev.ua/en/abstract/v38/i06/0839.html

DOI: https://doi.org/10.15407/mfint.38.06.0839

PACS: 44.10.+i, 68.08.-p, 68.35.Np, 68.47.-b, 81.15.Gh, 81.16.Pr, 81.65.Mq

Citation: S. V. Loskutov, A. V. Yershov, and E. A. Zeleninа, Influence of Surface Oxides on the Mechanism of Adhesion of a Coating at Plasma Spraying, Metallofiz. Noveishie Tekhnol., 38, No. 6: 839—851 (2016) (in Russian)

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