Bimodal distribution characteristic of microstructure and mechanical properties of nanostructured composite ceramic coatings prepared by supersonic plasma spraying |
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| Affiliation: | 1. School of Engineering and Technology, China University of Geosciences, Beijing 100083, China;2. National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China;3. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;1. Laboratoire PROcédés, Matériaux, Energie Solaire (PROMES), UPR 8521 CNRS, 7 rue du Four Solaire, 66120 Odeillo, France;2. TOTAL Energies Nouvelles, 2 place Jean Miller, La Défense 6, 98078 Paris La Défense cedex, France;3. Université de Perpignan – Via Domitia (UPVD), 52 avenue Paul Alduy, 66860 Perpignan cedex, France;1. Equipe Verres et Céramiques, Institut des Sciences Chimiques de Rennes, Université Rennes 1, 35042 Rennes Cedex, France;2. Laboratoire de Physique des Lasers Atomes et Molécules, Université Lille 1, 59655 Villeneuve d׳Ascq, France;1. Institute of Materials Engineering, ANSTO, Kirrawee DC, NSW 2232, Australia;2. Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, United Kingdom;3. Centre for Antimatter-Matter Studies (CAMS), Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia;1. Advanced Materials Institute, Mechanical Engineering College, West Heping Road 97, Shijiazhuang 050003, PR China;2. Military Representative Office in 743 Factory, North Heping Road 5, Taiyuan 030000, PR China;1. Joining and Welding Research Institute, Osaka University, 11-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan;2. Shanghai Toyo Tanso., Ltd., No. 486 Xinfei Road, Songjiang, Shanghai 201611, P.R. China;3. Advanced Carbon Technology Center, Toyo Tanso. Co., Ltd. 5-7-12, Takeshima, Nishiyodogawa-Ku, Osaka 555-0011, Japan |
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| Abstract: | Nanostructured composite ceramic coatings (NCs) were deposited by supersonic plasma spraying (SPS) technique. The microstructures of NCs were characterized using scanning electron microscope (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM). The results showed that the microstructure of NCs exhibited a bimodal distribution consisting of fully melted regions (FM regions) and partially melted regions (PM regions). With the spray power increasing, the proportions of FM regions and PM regions both increased, but no distinct laws were found. The measured data of elastic modulus, micro-hardness and fracture toughness were analyzed using Weibull statistics. The results showed that these micromechanical properties followed Weibull distribution and presented a characteristic of bimodal distribution. |
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