Tribochemical behavior of alumina coatings deposited by high-velocity oxy fuel spraying |
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| Affiliation: | 1. Department of Materials Science and Engineering, College of Chemical and Metallurgical Engineering, Shiraz Branch, Islamic Azad University, Shiraz 71955, Iran;2. Faculty of Materials Science and Engineering, K.N. Toosi University of Technology, Tehran, Iran;1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China;2. Department of Mechanical Engineering and Materials Science Program, University of Wisconsin-Madison, Madison, WI 53706, USA;3. International Center for New-Structured Materials (ICNSM), Zhejiang University, Hangzhou 310027, PR China;4. Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China;1. Institute for Materials and Surface Technology, University of Applied Sciences, Kiel, Germany;2. Laboratoire de Physique de La Matière Condensée (LPMC), Université de Picardie, Amiens, France;1. School of Physical Sciences, National Institute of Science Education and Research, Bhubaneswar, Jatni 752050, India;2. Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India;3. Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, India;1. Department of Mechanical Engineering and Industrial Engineering, Louisiana State University, 3283 Patrick Taylor Hall, Baton Rouge, LA 70803, USA;2. Department of Mechanical Engineering, Indian Institute of Science, Bengaluru 560012, India |
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| Abstract: | Alumina is one of the most versatile coatings applied on tools whose working life is reduced due to high wear rate, high temperature, and highly corrosive environments. High-velocity oxy fuel (HVOF) methods are industrially used to deposit this type of coatings. In this study, the effect of the hydrochloric acid concentration on the wear behavior of an HVOF alumina coating was investigated through room-temperature and 60 °C pin-on-disk wear experiments. The results showed that the corrosive environments up to 5% acid did not meaningfully affect the wear damage rate, as compared to the dry condition, due to a contest between friction coefficient and corrosion damage. Nevertheless, the wear rate significantly increased at higher acid concentrations and higher temperatures, since the corrosion effect prevailed over the friction coefficient effect. Also, the predominant wear mechanism was recognized to be adhesive. |
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| Keywords: | Films Wear resistance |
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