Study of the Structure and Mechanisms of Wear of Solid-Lubricant Coatings of the TiN–Pb System

A. A. Lozovan; Лозован А. А.; S. Ya. Betsofen; Бецофен С. Я.; S. V. Savushkina; Савушкина С. В.; M. A. Lyakhovetsky; Ляховецкий М. А.; L. N. Lesnevsky; Лесневский Л. Н.; I. A. Nikolaev; Николаев И. А.; Yu. S. Pavlov; Павлов Ю. С.; E. P. Kubatina; Кубатина Е. П.; L. E. Agureev; Агуреев Л. Е.

doi:10.31857/S1028096023080095

Study of the Structure and Mechanisms of Wear of Solid-Lubricant Coatings of the TiN–Pb System

Authors: Lozovan A.A.¹, Betsofen S.Y.¹, Savushkina S.V.¹, Lyakhovetsky M.A.¹, Lesnevsky L.N.¹, Nikolaev I.A.¹, Pavlov Y.S.¹, Kubatina E.P.¹, Agureev L.E.²
Affiliations:
1. Moscow Aviation Institute (National Research University)
2. JSC State Research Center “Keldysh Center”
Issue: No 8 (2023)
Pages: 64-73
Section: Articles
URL: https://rjmseer.com/1028-0960/article/view/664524
DOI: https://doi.org/10.31857/S1028096023080095
EDN: https://elibrary.ru/OAUCTC
ID: 664524

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Abstract

Сomposite solid lubricating coatings TiN–Pb with a thickness of ~2 μm were produced by co-sputtering of Ti and Pb cathodes of two separate magnetrons on titanium alloy VT6. The Pb content in the coating averages ~12 at. %. The inner layer is coating characterized by a uniform distribution of Pb, and the upper layer is characterized by the presence of islands with a high content of Pb. The coating structure is globular, predominantly containing nanometer-sized crystallites. The absence of a columnar structure of the coating is associated with a high content of Pb, which is insoluble in the TiN matrix and interrupts the growth of crystallites. X-ray diffraction analysis showed the presence of Pb, PbO, and TiN phases in the coatings. The diffraction lines are broadened, which indicates that the crystallite size is ~10–20 nm in the coating. Tribological tests of the TiN–Pb coating were carried out under conditions of low-amplitude friction – fretting wear in a wide range of loading parameters. In the full slip mode, a friction coefficient of ~0.25 is observed. During the transition from the full slip mode to the reciprocating slip mode, the energy dissipated during friction drops by more than three times, which is also reflected in a sharp decrease in the friction coefficient from 0.25 to 0.05.

Keywords

coating, magnetron sputtering, structure, texture, phases, titanium nitride, lead, solid lubricant coating, fretting, wear.

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