Experimental analysis and finite element modeling of the piston-on-three balls testing of Y-TZP ceramic

Abstract

The objectives of this study were to characterize and evaluate the physical and mechanical properties of an experimental zirconia for dental application and compare the biaxial flexural strength results with the finite element simulation (FEM). Yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic samples were sintered at 1475 °C/2 h and characterized by X-ray diffraction, scanning electron microscopy, relative density, flexural strength using piston-on-three balls (P-3B) test and Young’s modulus. From the flexural strength results, numerical simulations were performed using Abaqus software. The complete model used 70216 elements, considering the components of the test. The results indicated full densification of sintered samples, ZrO2-tetragonal and ZrO2-cubic as crystalline phases, and average grain size of 0.6±0.2 μm. Mechanical characterization of sintered samples indicated Young’s modulus of 195±4 GPa, flexural strength of 1191±9 MPa and Weibull modulus m=16.3. FEM simulation indicated a flexural strength close to 1100 MPa, with a difference lower than 7% in relation to the experimental results. The results were compared associating the physical and mechanical properties of Y-TZP with its intrinsic phenomena such as tgm transformation and ferroelastic domain.

Ball‐on‐ring test validation for equibiaxial flexural strength testing of engineered ceramics

“… and are equal at the center of the tensile surface of the disk. As the radial distance increases, the difference between these two stresses also increases 33,34 . In addition, a sharp decrease in the stress pattern on the tensile surface of the specimen is clearly indicated in the plot produced by the FE model.…”

“…As the radial distance increases, the difference between these two stresses also increases. (33,34) In addition, a sharp decrease in the stress pattern on the tensile surface of the specimen is clearly indicated in the plot produced by the FE model. This is due to compressive stresses where the sample makes contact along the supporting ring and indicates that it will not be a failure point in the ball-on-ring test.…”

A Strength Behavior Approach for 3Y-TZP Ceramics Dental Implants Based on Finite Element Simulations

“…Furthermore, the biaxial flexural strength was evaluated with the piston-on-three-balls (P-3B) testing procedure 18 , using a universal testing machine (EMIC® 1000 INSTRON-Group, Brazil) under a constant cross-head speed of 0.5 mm/min. Experimental details of the P-3B testing are given elsewhere 19 .…”

Numerical simulations of ceramic firing in catenary kilns

“…For this purpose, catenary kiln simulations were performed using the software Ansys CFX. In recent years, the bibliography presents a few works that address the issue of burning in catenary furnaces and the prediction of burning parameters through simulations [1][2][3][4][5]. Studies on issues related to burning parameters and even numerical simulations for combustion and radiation models were carried out [6][7][8][9][10][11][12].…”