Genesis and stability of tribolayers in solid lubrication: case of pair DLC-stainless steel | Zendy

Diego Berti Salvaro | Zendy; Márcio Silvério | Zendy; Cristiano Binder | Zendy; Renan Oss Giacomelli | Zendy; Aloı́sio Nelmo Klein | Zendy; José Daniel Biasoli de Mello | Zendy

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Genesis and stability of tribolayers in solid lubrication: case of pair DLC-stainless steel

Author(s) -

Diego Berti Salvaro,

Márcio Silvério,

Cristiano Binder,

Renan Oss Giacomelli,

Aloı́sio Nelmo Klein,

José Daniel Biasoli de Mello

Publication year - 2016

Publication title -

journal of materials research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.832

H-Index - 44

eISSN - 2214-0697

pISSN - 2238-7854

DOI - 10.1016/j.jmrt.2015.10.008

Subject(s) - materials science , lubrication , scanning electron microscope , tribology , energy dispersive x ray spectroscopy , chemical composition , atmosphere (unit) , spectroscopy , refrigerant , morphology (biology) , lubricant , metallurgy , composite material , chemical engineering , thermodynamics , physics , gas compressor , genetics , quantum mechanics , biology , engineering

The morphology, dimensions and chemical composition of tribolayers strongly depend on the pressures and temperatures acting on the contact. They are formed by reactions between surfaces in contact with each other as well as with the atmosphere, lubricants and possible contaminants. In this paper, the influence of test time (180, 500, 1000 and 2500h) on the formation and characteristics of tribolayers in pairs of DLC-stainless steel that were tested under an atmosphere of refrigerant gas R134a and without lubricating oil was analyzed. The characterization was performed using scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) (morphology and chemical composition) and white light interferometry (thickness). The tribolayer thicknesses ranged from 100 to 500nm, and they were composed of elements originating from mutual transfers between the tribological pairs, as well as oxides that were more pronounced on the stainless steel surface. The results show that the tribolayers are chemically stable, maintaining the same composition over time, and their thicknesses remained constant after 1000h of testing

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