Surface Roughness Influence on Tribological Behavior of HiPIMS DLC Coatings

Khan, Sharjeel AhmedLuleå tekniska universitet,Maskinelement,Department of Mechanical Engineering, CEMMPRE, University of Coimbra, Rua Luis Reis Santos, Coimbra, Portugal (author)

Validerad;2023;Nivå 2;2023-05-22 (hanlid);Funder: FCT–Fundação para a Ciência e a Tecnologia (UIDB/00285/2020, LA/P/0112/2020)
The application of diamond-like carbon (DLC) coatings in dry machining of difficult-to-machine materials has been gaining popularity due to high inertness, low coefficient of friction (COF), and high hardness of these coatings. Although the effect of surface roughness on the tribological properties of DLC coatings is of paramount importance, usually it is overlooked and coatings performance analysis was accomplished generally on highly polished substrates. The generation of polished surfaces is a time-consuming, labor-intensive process and, in most cases, not feasible for the industry due to its high cost. This article focuses on determining the effect of substrate (cemented carbide, WC-Co) surface roughness on the load-bearing capacity and tribological properties of DLC coatings deposited by High Power Impulse Magnetron Sputtering (HiPIMS) in Ne–Ar gas plasma. The DLC films were deposited onto WC-Co substrates with three different surface roughness profiles and their tribological performance were evaluated using a reciprocating tribotest. The high surface roughness resulted in increased wear rate due to high levels of asperities and increased potential for premature delamination of the coatings, while also causing severe damage to the counterbody due to inhibition of transfer film formation.

Oliveira, JoãoDepartment of Mechanical Engineering, CEMMPRE, University of Coimbra, Rua Luis Reis Santos, Coimbra, Portugal (author)
Ferreira, FabioDepartment of Mechanical Engineering, CEMMPRE, University of Coimbra, Rua Luis Reis Santos, Coimbra, Portugal (author)
Emami, NazaninLuleå tekniska universitet,Maskinelement(Swepub:ltu)emami (author)
Ramalho, AmilcarDepartment of Mechanical Engineering, CEMMPRE, University of Coimbra, Rua Luis Reis Santos, Coimbra, Portugal (author)
Luleå tekniska universitetMaskinelement (creator_code:org_t)

By the author/editor: Khan, Sharjeel A ...; Oliveira, João; Ferreira, Fabio; Emami, Nazanin; Ramalho, Amilcar

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Tribology

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Manufacturing Su ...

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