Wear behavior of electroless Ni–P–B4C composite coatings |
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| Affiliation: | 1. Sakarya University Engineering Faculty, Department of Metallurgical & Materials Engineering, Esentepe Campus, 54187 Sakarya, Turkey;2. Sakarya University, Sakarya University Research and Development Center (SARGEM), Esentepe Campus, 54187 Sakarya, Turkey;3. Sakarya University Natural Resources And Waste Assessment Laboratory (DOKADEM),, Esentepe Campus, 54187 Sakarya, Turkey;1. Center of Excellence for Research in Engineering Materials (CEREM), Advanced Manufacturing Institute, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;2. Chemical Engineering Department, Curtin University, Bentley 6102, WA, Australia;3. Materials and Metallurgical Engineering Department, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA;4. Institute for Materials Research (IMR), School of Chemical & Process Engineering, Faculty of Engineering, University of Leeds, UK;5. Maritime Academy of Nigeria, Oron, Nigeria;6. Department of Mechanical Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;7. Department of Materials Science & Engineering, University of Delaware, Newark, DE 19716, USA |
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| Abstract: | In this research, the wear of electroless Ni–P and Ni–P–B4C composite coatings was reviewed. Auto catalytic reduction of Ni in nickel sulfate and sodium hypophosphate bath including suspended B4C particles with different concentration was used to create composite coatings with 12, 18, 25 and 33 vol.% of B4C particles. Coatings 35 μm thick were heat treated at 400 °C for one hour in an argon atmosphere and the wear resistance and friction coefficient of heat-treated samples were determined by block-on-ring tests. All wear tests were carried out at 24 °C, 35% moisture, 0.164 m/s sliding speed and about 1000 m sliding distance. Graphs show that an electroless Ni–P–B4C composite coating with 25 vol.% of B4C had the best wear resistance against a CK45 steel counterface. |
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