Microstructure,residual stresses,and mechanical performance of surface crystallized translucent glass-ceramics |
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| Affiliation: | 1. Graduate Program in Materials Science and Engineering (PPGCEM), Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), São Carlos, SP 13.565-905, Brazil;2. Center of Research, Technology, and Education in Vitreous Materials (CeRTEV), Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), 13565-905, São Carlos, SP, Brazil;3. Department of Industrial Engineering, University of Trento, Via Sommarive 9, Trento, Italy;4. Université Paris-Saclay, ENS Paris-Saclay, CNRS, LMT - Laboratoire de Mécanique et Technologie, 91190 Gif-sur-Yvette, France;1. Institute of Iron and Steel Technology, TU Bergakademie Freiberg, Germany;2. Institute of Ceramics, Refractories and Composite Materials, TU Bergakademie Freiberg, Germany;3. Institute of material Science, TU Bergakademie Freiberg, Germany;1. Department for Nanostructured Materials, Jo?ef Stefan Institute, Jamova 39,1000 Ljubljana, Slovenia;2. Jo?ef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia;3. Facultad de Ciencias Físicas, GFMC, Universidad Complutense de Madrid, 28040 Madrid, Spain;4. Laboratorio de Heteroestructuras con aplicación en spintrónica, Unidad asociadaUCM/CSIC, 28049 Madrid, Spain;5. Materials Science Institute of Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain;6. Center for Electron Microscopy and Microanalysis, Jo?ef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;1. College of Science, Guilin University of Technology, Guilin 541004, China;2. Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China;3. Key Laboratory of Multifunctional Materials and Structures, Ministry of Education, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China;1. Functional Ceramics Laboratory, Department of Materials Science and Engineering, The University of Seoul, Seoul 02504, Republic of Korea;2. Electronic Convergence Materials Center, Advanced Materials Convergence R&D Division, Korea Institute of Ceramic Engineering and Technology, Jinju, Gyeongsangnam-do 52851, Republic of Korea;1. Joint Glass Centre of the IIC SAS, TnUAD and FChPT STU, Trencin, Slovak Republic;2. Centre for Functional and Surface Functionalised Glass, Alexander Dubcek University of Trencin, Trencin, Slovak Republic;3. Institute of Inorganic Chemistry, Dúbravská cesta 9, 845 36 Bratislava 45, Slovak Republic;4. Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Ko?ice, Slovak Republic;1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, China;2. State Key Laboratory of Military Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi’an, 710032, China;3. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China |
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| Abstract: | Mechanical properties of glasses can be significantly increased by inducing surface crystallization of a low coefficient of thermal expansion phase. In this work, we produced surface crystallized lithia-alumina-silica glass-ceramics with different crystallized layer thicknesses and analysed the resulting residual stresses and their effect on mechanical properties. The residual stress magnitude was estimated by analytical and experimental methods, as well as numerical modeling. The surface compressive stress reached 390 MPa and 490 MPa, as given by the analytical and experimental determination, respectively. These stresses prevented radial cracking in microhardness and scratch tests. The best glass-ceramic achieved a Vickers hardness of 7.5 GPa and fracture strength of 680 ± 50 MPa in a ball-on-three-ball test. These glass-ceramics are translucent, providing 50–60% transmittance over the visible wavelength spectrum (1.3 mm-thick-sample). This study unveiled the causes of improved mechanical properties and validates the concept that surface crystallization is a valuable technique for developing high strength glass-ceramics. |
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| Keywords: | Crystallization Glass-ceramic Surface Residual stress Mechanical property |
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