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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Pan American Materials Congress: Advanced Biomaterials
Presentation Title Investigation of Properties in Glass-ceramics Based on Li<sub>2</sub>O-SiO<sub>2</sub> System during Li<sub>2</sub>SiO<sub>3</sub>-Li<sub>2</sub>Si<sub>2</sub>O<sub>5</sub> Transformation
Author(s) Bruno Galvão Simba, Marcos Valério Ribeiro, Claudinei dos Santos, Paulo Atsushi Suzuki, Luís Rogério de Oliveira Hein, Manuel Fellipe Alves
On-Site Speaker (Planned) Bruno Galvão Simba
Abstract Scope Lithium metasilicate glass-ceramic, Li<sub>2</sub>SiO<sub>3</sub>, for CAD/CAM (Computer-aided design/Computer-aided manufacturing) machining has unparalleled aesthetic properties for the manufacture of dental restorations. This material is milled to obtain partial or total replacement components to natural teeth. After milling, the prostheses are submitted to heat treatment to the transformation of Li<sub>2</sub>SiO<sub>3</sub> in lithium disilicate, Li<sub>2</sub>Si<sub>2</sub>O<sub>5</sub>. In this work, Li<sub>2</sub>SiO<sub>3</sub> samples were heat treated at 820°C at different holding times from one to nine minutes under vacuum. Samples were characterized by X-ray diffraction, SEM (Scanning Electron Microscopy), hardness, fracture toughness, biaxial flexure test. The results indicate a progressive increase in Li<sub>2</sub>SiO<sub>3</sub>-Li<sub>2</sub>Si<sub>2</sub>O<sub>5</sub> transformation, hardness around 580 HV, a slight increase in fracture toughness (1.8 to 2.0 MPam<sup>1/2</sup>) and increased bending resistance associated with Li<sub>2</sub>Si<sub>2</sub>O<sub>5</sub> rise, which is composed of grains with high aspect ratio.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)


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PAN-2: Elastic Modulus of Ternary Titanium Alloys for Biomedical Applications
PAN-5: Injectable Bone Substitute of Fibroin and Nanohydroxyapatite
PAN-6: Metal-vitreous Biocide Coating
PAN-7: Nature's Technical Ceramic: The Avian Eggshell
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PAN-9: Selective Laser Sintering of Co-Cr-Mo Alloy for Dental Applications
Pangolin Armor: Overlapping, Structure, and Mechanical Properties of the Keratinous Scales
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