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Deformation behaviour of iron-doped alumina
Affiliation:1. Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506-0046, United States;2. Electron Microscopy Center, College of Engineering, University of Kentucky, Lexington, KY 40506-0046, United States;3. Department of Civil Engineering, University of Kentucky, Lexington, KY 40506-0046, United States;1. Korea Institute of Ceramic Engineering&Technology (KICET), 3321, Gyeongchung-daero, Sindun-myeon, Icheon-si, Gyeonggi-do 7303, Republic of Korea;2. School of Materials Science and Engineering, Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China;3. Department of Ecosystem Science and Management, Materials Research Institute, 204 Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA;1. GFZ German Research Center for Geosciences, Telegrafenberg, 14473, Potsdam, Germany;2. School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom;3. Department of Earth Sciences, Free University of Berlin, 12249, Berlin, Germany;4. School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom;1. Food and Bioscience, SP Technical Research Institute of Sweden, Gothenburg, Sweden;2. Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden;3. Tetra Pak Processing Systems, Lund, Sweden;1. School of Civil Engineering, Wuhan University, No. 8, East Lake South Road, Wuhan, PR China;2. Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark;3. Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark;4. School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China;1. Research Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China;2. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
Abstract:Compressive creep tests in air were carried out on 1 cat.% Fe-doped alumina at a temperature T=1400 °C. Iron doping affected the plastic deformation by different ways in relation with Fe2+ cations population. Fe2+ cations sped up the deformation rates. FeAl2O4 spinel precipitates were identified and they were found (i) to interact with alumina grain boundaries (ii) to limit the grain growth within a range of strain. The Fe2+ cations underwent oxidation and this resulted in the dissolution of the some precipitates and in the decrease of deformation rates. It was suggested that deformation sped up this evolution through mass transport and that time was not a dominating parameter.
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