Structure and tribological properties of AlCrTiN coatings at elevated temperature |
| |
| Authors: | Tomas Polcar Albano Cavaleiro |
| |
| Affiliation: | 1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha Hunan 410083, China;2. Zhuzhou Cemented Carbide Cutting Tools Co., Ltd, Zhuzhou Hunan 412007, China;1. Materials Center Leoben Forschung GmbH, 8700 Leoben, Austria;2. PLATIT AG Advanced Coating Systems, Eichholzstrasse 9, 2545 Selzach, Switzerland;1. Kennametal Inc., 1600 Technology Way, Latrobe, PA 15650, United States;2. Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States;1. School of Mechanical and Manufacturing Engineering, UNSW Sydney, NSW 2052, Australia;2. Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland;3. Chalmers University of Technology, Department of Physics, SE-41296 Göteborg, Sweden;4. PLATIT AG – Advanced Coating Systems, Eichholzstrasse 9, CH-2545 Selzach, Switzerland |
| |
| Abstract: | In this study, we analyzed the high temperature tribological behavior of AlCrTiN coatings deposited on WC substrates by low cathodic arc technique. The coatings chemical composition, Al 31 at.%, Cr 16 at.%, Ti 7 at.% and N 46 at.%, and the bonding state were evaluated by X-ray photoelectron spectroscopy. The mechanical properties of the coatings were studied by scratch-test and nanohardness depth sensing indentation. The morphology of the coatings surface, ball scars, wear tracks and wear debris as well as the oxidized samples was examined by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The structure was analyzed using X-ray diffraction (XRD). Wear testing was carried out using a high temperature tribometer (pin-on-disc) with alumina balls as counterparts. The evaluation of the friction coefficient with the number of cycles (sliding distance) was assessed at different temperatures and the wear rates of the coatings and balls were determined; the maximum testing temperature was 800 °C. The coating showed an excellent thermal stability and wear resistance. The friction reached a maximum at 500 °C and then decreased, whereas the wear rate was negligible up to 600 °C and increased significantly at higher temperatures. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
