Role of nanocrystalline feedstock in the tribological behaviour of alumina coatings deposited by detonation gun |
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| Affiliation: | 1. School of Materials Science and Engineering, Chang''an University, Xi''an 710061, China;2. Centre for Advanced Materials Processing and Manufacture, School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, Queensland 4072, Australia;3. Faculty of Humanities and Social Sciences, City University of Macau, Macau, China;4. School of Construction Machinery, Chang''an University, Xi''an, Shaanxi 710064, China;1. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi Province 710049, PR China;2. University of Limoges, SPCTS, UMR 7315, 87000 Limoges, France |
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| Abstract: | Alumina coatings were prepared using detonation gun from commercial powder (CP) and high energy ball milled powder (MP) with 83 nm crystallite size. The sliding wear rate and wear coefficient of friction were lower in the nanocrystalline powder coating. The coating from the as-received commercial powder consisted of thick splats, and a paucity of nanoparticulate inter-splat regions whereas milled powder coating has thinner splat morphology with nanoparticulate inter-splat regions. The nanoparticulate material in the inter-splat regions and the finer microstructure of the MP coating is believed to be responsible for improved wear resistance. |
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