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Article

Super-Hard DLC Coatings as an Alternative to Polycrystalline Diamond for Cutting Tools: Predictive Analysis of Aluminium Alloy Surface Quality

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Unit of Metallic and Ceramic Materials, Eurecat, Centre Tecnològic de Catalunya, Plaça de la Ciència 2, 08243 Manresa, Spain
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Unit of Applied Artificial Intelligence, Eurecat, Centre Tecnològic de Catalunya, Av. Universitat Autònoma, 23, 08290 Cerdanyola del Vallès, Spain
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Tratamientos Térmicos Carreras S.A., Passatge de l’Enginyer Playà, 38-42, 08205 Sabadell, Spain
*
Author to whom correspondence should be addressed.
Lubricants 2022, 10(7), 135; https://doi.org/10.3390/lubricants10070135
Received: 30 May 2022 / Revised: 17 June 2022 / Accepted: 22 June 2022 / Published: 23 June 2022
(This article belongs to the Special Issue Tribology for Lightweighting)
The use of lightweight materials, such as ultra-high-strength aluminium alloys, is in high demand in the automotive and aerospace industries where weight savings are critical. The tool materials used for high-speed cutting of these aluminium alloys are subjected to severe conditions that promote premature failure of cutting tools. The application of polycrystalline diamond (PCD) coatings provides cutting tools with increased mechanical and thermal fatigue resistance and improved tribological performance. Despite these good properties, their high cost remains a major limitation in this sector. Super-hard Diamond-Like Carbon (DLC) coatings offer a technologically and economically feasible alternative to PCD-coated tools for cutting and machining non-ferrous materials. In this paper, the machining performance of coated and un-coated hard metal inserts in the turning of 7075 aluminium alloy has been explored. The surface quality of machined parts, the cutting tool wear resistance and the vibrations generated during turning of un-coated, PCD and super-hard thin DLC coatings on tungsten carbide inserts were compared. The results obtained demonstrate that DLC coatings are a potentially interesting alternative to PCD coatings for machining ultra-high-strength aluminium alloys, where surface component finish is a key factor. View Full-Text
Keywords: DLC coatings; PCD coatings; cathodic arc deposition; tool wear; tool vibrations; aluminium alloys DLC coatings; PCD coatings; cathodic arc deposition; tool wear; tool vibrations; aluminium alloys
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MDPI and ACS Style

Ramírez, G.; Gonzalez Castro, J.M.; Orrit-Prat, J.; Bonet, R.; Cuadrado, N.; Vilaseca, M.; Carreras, L.; Caro, J. Super-Hard DLC Coatings as an Alternative to Polycrystalline Diamond for Cutting Tools: Predictive Analysis of Aluminium Alloy Surface Quality. Lubricants 2022, 10, 135. https://doi.org/10.3390/lubricants10070135

AMA Style

Ramírez G, Gonzalez Castro JM, Orrit-Prat J, Bonet R, Cuadrado N, Vilaseca M, Carreras L, Caro J. Super-Hard DLC Coatings as an Alternative to Polycrystalline Diamond for Cutting Tools: Predictive Analysis of Aluminium Alloy Surface Quality. Lubricants. 2022; 10(7):135. https://doi.org/10.3390/lubricants10070135

Chicago/Turabian Style

Ramírez, Giselle, Jose M. Gonzalez Castro, Jordi Orrit-Prat, Raül Bonet, Nuria Cuadrado, Montserrat Vilaseca, Lluís Carreras, and Jaume Caro. 2022. "Super-Hard DLC Coatings as an Alternative to Polycrystalline Diamond for Cutting Tools: Predictive Analysis of Aluminium Alloy Surface Quality" Lubricants 10, no. 7: 135. https://doi.org/10.3390/lubricants10070135

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