About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
2025 Graduate Student Poster Contest
|
| Presentation Title |
SPG-9: Mechanical Strength and Microstructural Properties of Multilayer Zirconia After Glass Infiltration |
| Author(s) |
Raphaelle Santos Monteiro De Sousa, Tiago Moreira Bastos Campos, Larissa Marcia Martins Alves , Ernesto Byron Benalcázar Jalkh , Ricardo Tanaka , Edisa de Oliveira Sousa, Gilmar Patrocínio Thim, Jason Alan Griggs, Estevam Augusto Bonfante |
| On-Site Speaker (Planned) |
Raphaelle Santos Monteiro De Sousa |
| Abstract Scope |
The aim of this study was to investigate the effect of glass infiltration on mechanical and microstructural properties of an experimental multilayer zirconia composed of 3Y-TZP, 4Y-PSZ, and 5Y-PSZ (tensile surface) (Tosoh). Disc-shaped specimens (1.2 x 14 mm / ISO 6872) were obtained via uniaxial pressing (n=64) and divided into Non-Graded (NG) and Graded (GR) groups. After pre-sintering, 32 specimens underwent glass infiltration on the 5Y side. Specimens were sintered and characterized using scanning electron microscopy (SEM) and biaxial flexural strength (BFS). Fractography and Weibull statistics were applied. SEM revealed grain transformation in the GR group, with a significant increase in characteristic strength [NG: 440.7 (402.1-483) and GR: 825.1 (779.3-873.7)]. No statistical difference was found in the Weibull modulus [NG: 4.11 (3.13-5.41) and GR: 6.58 (4.95-8.76)]. Fractography revealed hackle lines and compression curls, indicating surface-originating fracture on the tensile side. Glass infiltration significantly improved the mechanical strength without compromising reliability. |