Mechanical characterization of a prototype a-C:Cr,Si and its tribological behavior at high temperature
Article dans une revue avec comité de lecture
Author
STAIA, Mariana
89498 Universidad Central de Venezuela [UCV]
211915 Mechanics surfaces and materials processing [MSMP]
89498 Universidad Central de Venezuela [UCV]
211915 Mechanics surfaces and materials processing [MSMP]
DUBAR, Laurent
1303 Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 [LAMIH]
1303 Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 [LAMIH]
DUBAR, Mirentxu
1303 Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 [LAMIH]
1303 Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 [LAMIH]
Date
2016Journal
Tribology InternationalAbstract
The results of the mechanical and tribological characterization of a prototype a-C:Cr, Si sputtered coating are presented. The hardness and the elastic modulus of the coated system have been determined by means of nanoindentation taking into account the actual architecture of the bi-layer coating. Both mechanical properties were recorded continuously versus the indentation depth, h, up to approximately 2000 nm, at a constant indentation rate and maximum applied loads of 700 mN. The results were analyzed by means of the Oliver and Pharr method and modeled on the basis of novel approach proposed recently by some of the authors. Wear tests were conducted at 25 °C, 400 °C and 450 °C against alumina, employing a contact pressure of 540 MPa. Characterization of the worn surfaces by SEM and elemental X-ray mapping has also been carried out. A wear rate as low as 1.2×10−18 m3/N m was determined for the coating tested at 25 °C, which is approximately one order of magnitude and three times less than those found from the tests performed at 400 °C and 450 °C, respectively. It has been determined that the a-C:Cr,Si coating exhibits a very good wear resistance even at temperatures up to 450 °C, as consequence of the Si and Cr oxides formed due to the oxidation process. Also, it has found that at this temperature, a continuous oxide film is formed, which reduces the wear rate of the coated system in comparison to that determined at 400 °C. However, the volume increase due to the oxidation process at 450 °C and the elimination of CO2, Ar and H2O vapors, induces a severe surface cracking of the coating.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Communication sans actePUCHI-CABRERA, Eli-Saul; STAIA, Mariana; GUÉRIN, J.D.; IOST, Alain; DUBAR, Laurent (2016)The computation of the elastic contact stresses and particularly the detemination of the change in the von Mises stress from the surface of a coated system, when it is subjected to spherical indentation, constitutes an ...
-
Article dans une revue avec comité de lectureSTAIA, Mariana; PUCHI-CABRERA, Eli-Saul; SANTANA, Y.Y.; LA BARBERA-SOSA, J.G.; IOST, Alain; CHICOT, Didier; PEREZ DELGADO, Yeczain; DE BAETS, Patrick (2013)The present investigation has been conducted in order to evaluate the tribological behavior of an AA2024-T3 aluminum alloy, coated with a NiP-CrC-DLC coating. The effect of NiP as intermediate layer was evaluated by carrying ...
-
Article dans une revue avec comité de lectureSTAIA, Mariana; PUCHI-CABRERA, Eli-Saul; IOST, Alain; ZAIRI, Amel; BELAYER, S.; VAN GORP, Adrien (Elsevier, 2015)Considerable improvement in the tribological response was achieved during sliding wear tests against alumina ball, when AA 2024-T3-aluminium alloy substrate was coated with DLC/NiP duplex coating. Quantitative EPMA analysis ...
-
Communication avec acteSTAIA, Mariana; TROCELIS, A; ZAIRI, Amel; SUAREZ, M; PUCHI-CABRERA, Eli-Saul; IOST, Alain; MONTAGNE, Alex (2016)The present work has been conducted in order to assess the mechanical and tribological performance of a ZrN coating deposited onto a H13 steel substrate by means of a closed field unbalanced magnetron-sputtering ion-plating ...
-
Communication avec acteSANTANA, Y.Y.; GUTIÉRREZ, M.V.; STAIA, Mariana; LA BARBERA-SOSA, J.G.; PUCHI-CABRERA, Eli-Saul; IOST, Alain; CHICOT, Didier (Surface Modification Technologies (SMT31), 2017)Thermal sprayed coatings based on WC-Co are widely used for providing wear resistance to engineering components. The High Velocity Oxygen Fuel (HVOF) thermal spraying technique is one of the most commonly employed for ...