Reaction behavior and wear properties of in-situ air plasma-sprayed Al2O3-TiB2 composite coatings |
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| Affiliation: | 1. Department of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran;2. Department of Ceramics, Materials and Energy Research Centre, Karaj, Iran;3. Department of Materials, Mechanics, Management and Design, Delft University of Technology, Delft, the Netherlands;1. Federal Institute of Santa Catarina (IFSC), Campus Criciúma, SC, Brazil;2. Department of Materials, Textiles, and Chemical Engineering, Ghent University, Ghent, Belgium;3. Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), SP, Brazil;4. Institute of Ceramic Technology (ITC), Universidad Jaume I (UJI), Campus Riu Sec, Castellón, Spain;5. Graduate Program in Materials Science and Engineering (PGMAT), Federal University of Santa Catarina (UFSC), SC, Brazil;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. Technology Center of China Tobacco Yunnan Industrial Co., Ltd., Kunming, 650231 Yunnan, China;1. Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China |
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| Abstract: | In this study, Al2O3-TiB2 coating was successfully deposited on steel substrates by in situ plasma spraying (IPS) using H3BO3, Al, and TiO2 reactants. Beside TiB2 and Al2O3, Al18B4O33 was formed as a by-product with ratio of about 13 wt%. The effect of milling time of reactant and the reaction behavior was also explored. Milling process for at least 10 h can promote efficiency of reaction and milling for efficient production of Al2O3-TiB2 composite. Wear behavior was examined in terms of hardness, wear track width, and wear rate of the coatings with respective measured values of 797.6 HV, 1061.3 µm, and 4.2 × 10−3 mm3/N.m. Based on the FESEM observations, the thickness of abrasive coating was 417 µm, delamination and adhesion were the main wear mechanisms in Al2O3-TiB2-coated specimens. |
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| Keywords: | Ceramic Coatings In-situ Milling Plasma spray Wear resistance |
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