Residual stresses in porcelain tiles. Measurement and process variables assessment |
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| Affiliation: | 1. Instituto de Tecnología Cerámica (ITC), Universitat Jaume I, 12071, Castellón, Spain;2. GEA CERAMICA S.L., Castellón, Spain;3. Kaleseramik Canakkale Kalebodur, Çan, Turkey;1. Instituto de Tecnología Cerámica (ITC), Universitat Jaume I, 12006, Castellón, Spain;2. Instituto de Cerámica y Vidrio (ICV), Consejo Superior de Investigaciones Científicas (CSIC), c/Kelsen 5, 28049, Madrid, Spain;1. Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China;2. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and precision Mechanics, Chinese Academy of Science (CAS), Xi’an, Shaanxi 710119, China;3. Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 53210 Pardubice, Czech Republic;4. Department of General and Inorganic Chemistry, Faculty of Chemical Technology and Center for Materials and Nanotechnologies, University of Pardubice, Studentska 573, Pardubice 532 10, Czech Republic;5. Photonics Research Centre, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland;6. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China;1. Instituto de Tecnología Cerámica, Asociación de Investigación de las Industrias Cerámicas, Castellón, Spain;2. Instituto Universitario de Tecnología Cerámica, Universitat Jaume I, Castellón, Spain;3. Departamento de Ingeniería Química, Universitat Jaume I, Castellón, Spain |
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| Abstract: | This research addresses the residual stresses phenomenon taking place during the manufacture of porcelain tiles. Residual stresses were quantified by the strain relaxation slotting method. The method is based on the fact that stresses are released when a slot is made leading to a curvature change.Once the method was validated, the impact of process variables such as starting body composition, temperature and cooling rate of firing cycle was investigated. Findings showed that cooling rate was the most influencing variable whereas Young’s modulus of fired specimens also play a significant role. Symmetry of the parabolic residual stress profile denoted homogenous cooling on upper and lower tile surfaces during the cooling step. In addition, it was observed that polishing of a stressed tile gives rise to a decreasing of deformation as a consequence of stress release by mechanical grinding. |
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| Keywords: | Residual stresses Strain relaxation method Porcelain tiles Process variables Polishing |
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