Effects of modification of hBN by nickel plating on coating structure and properties of supersonic plasma spraying NiCr-Cr3C2-hBN@Ni coatings |
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| Affiliation: | 1. National Engineering Research Center for Mechanical Product Remanufacturing, Army Academy of Armored Forces, Beijing, 100072, China;2. National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing, 100072, China;3. School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China;1. School of Physical Science and Technology, Yangzhou University, Yangzhou, 225002, PR China;2. Guangling College, Yangzhou University, Yangzhou, 225000, PR China;3. Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, 225002, PR China;1. Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, India;2. Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box, 2455, Riyadh, 11451, Saudi Arabia;3. Department of Physics, KPR Institute of Engineering and Technology, Coimbatore, 641 407, Tamilnadu, India;4. Department of Chemical and Biochemical Engineering, Dongguk University, Seoul, 04620, Republic of Korea;1. Henan Key Laboratory of High Temperature Functional Ceramics, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China;2. Key Laboratory of Material Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China;1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China;2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, 650093, China |
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| Abstract: | Hexagonal boron nitride (hBN) with excellent self-lubrication performance is expected to relieve the friction resistance and wear of NiCr–Cr3C2 coatings. However, the poor wettability of hBN with most materials makes it difficult to fabricate NiCr–Cr3C2-hBN composite coating with good cohesion strength. In this study, hBN was firstly pretreated through magnetron-sputtering aided Ni plating to form hBN@Ni particles. Then, NiCr–Cr3C2-hBN@Ni powder was prepared by spray granulation. Next, corresponding coatings were prepared through supersonic atmosphere plasma spraying. It was found that in comparison with NiCr–Cr3C2-hBN coating, the NiCr–Cr3C2-hBN@Ni coating exhibited a decreased porosity (from 3.6% to 0.3%), elevated cohesion (from 52.78 N to 62.11 N), and the wear rate decreased by an order of magnitude. It was concluded that hBN@Ni can effectively improve the component interface inside powder, enhance the cohesion of molten in-flight particles, and make the internal structure of the coating denser. |
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| Keywords: | Supersonic atmosphere plasma spraying Composite coating hBN Tribology Coating modification |
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