Modelling the nucleation process in alumina lamellae deposited on a steel substrate |
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| Authors: | Y Lahmar-Mebdoua A Vardelle P Fauchais D Gobin |
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| Affiliation: | 1. Centre de Développement des Technologies Avancées, Baba Hassen, Algiers, Algeria;2. Laboratoire Science des Procédés Céramiques et de Traitements de Surface UMR-CNRS 6638, University of Limoges, France;3. Laboratoire FAST, Univ. Pierre et Marie Curie, CNRS, F-91405 Orsay, France;1. INFN, Sezione di Firenze and Dipartimento di Fisica e Astronomia, Università di Firenze, I-50019 Sesto Fiorentino, Florence, Italy;2. Physik-Institut, Universität Zürich, CH-8057 Zürich, Switzerland;1. Department of Physics, Indian Institute of Technology Guwahati, Assam 781039, India;2. Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India;1. Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, China;2. IFW Dresden, Institute for Complex Materials, 01069 Dresden, Germany;3. Institute of Materials Science, Technische Universität Dresden, 01062 Dresden, Germany;4. Department of Applied Physics, Northwestern Polytechnical University, 710072 Xi’an, China;5. School of Materials Science and Engineering, Taiyuan University of Science and Technology, 030024 Taiyuan, China;6. Department of Metallurgical Engineering, Center for Noncrystalline Materials, Yonsei University, Seoul 120-749, Republic of Korea;1. Key Laboratory of Manufacture and Test Techniques for Automobile Parts, Chongqing University of Technology, Ministry of Education, Chongqing 400054, China;2. Materials Science & Engineering College, Chongqing University of Technology, Chongqing 400054, China;3. Chongqing Academy of Science and Technology, Chongqing 401123, China;4. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400030, China;1. College of Mechanical and Electrical Engineering, Jiaxing University, Jiaxing, 314001, China;2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, China;1. Departamento de Física, Universidade Federal de São Carlos, PO Box 676, 13565-905, São Carlos, SP, Brazil;2. Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal |
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| Abstract: | A one-dimensional model has been developed to address the non-equilibrium heat transfer between an alumina lamella deposited by plasma spraying, and a steel or alumina substrate. The model includes under-cooling phenomenon, heterogeneous nucleation and crystal growth kinetics, allowing for the prediction of the temperature evolution in the lamella and substrate and of the nucleation temperature, grain density and size distribution. The effect on the nucleation process of the contact angle between the nucleus and substrate surface and of the quality of the contact at the splat–substrate interface is emphasized. The influence of the splat thickness, substrate material and substrate oxidation on the grain size distribution is also discussed. |
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