Thermal residual stresses and their toughening effect in Al2O3 platelet reinforced glass |
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| Affiliation: | 1. Manchester Materials Science Centre, University of Manchester and UMIST, Grosvenor Street, Manchester M1 7HS, UK;2. FG Werkstofftechnik, Technische Universitaet Ilmenau, 98684 Ilmenau, Germany;1. Department of Physics, Mohamed Sathak Engineering College, Kilakarai-623806, Tamil Nadu, India;2. Physics Wing (DDE), Annamalai University-608002, Tamil Nadu, India;1. State Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, PR China;2. MOE Engineering Research Center for Brittle Materials Machining, Huaqiao University, Xiamen 361021, PR China;1. Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC;2. Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, ROC;3. Biomedical Electronics Translational Research Center, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC;1. Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand;2. Synchrotron Light Research Institute, Muang, Nakhon Ratchasima 30000, Thailand;3. Department of Chemistry and 4D LABS, Simon Fraser University, Burnaby, British Columbia, Canada, V5A 1S6;4. School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK;5. School of Ceramic Engineering, Suranaree University of Technology, Muang, Nakhon Ratchasima 30000, Thailand;1. SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon, Kyunggi-do 16419, South Korea;2. School of Materials Science and Engineering, Sungkyunkwan University, Suwon, Kyunggi-do 16419, South Korea |
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| Abstract: | Fluorescence spectroscopy has been used to measure the thermal residual stresses in Al2O3-platelet/borosilicate glass composites. Tensile residual stresses were found in the platelets, implying the presence of compressive residual stresses in the glass matrix. Measurements of stresses in the bulk of the composite could be obtained using fluorescence from platelets below the specimen surface. The measured stresses lay between the predictions of models for spherical particles and thin platelets, but were closer to the former for the range of platelet contents investigated (5–30 vol.%). Estimates of the increase in toughness associated with the compressive residual stresses in the matrix suggest that this mechanism makes a significant contribution to the toughening effect of the Al2O3 platelets. |
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