Effect of the Al2O3 content on the mechanical properties and microstructure of 3Y-TZP ceramics for dental applications

Autor:	Hyung-Bong Lim, Dongxu Tang, Ki-Woong Park, Won Seung Cho, Ki-Ju Lee, Jing-Wen Xu
Rok vydání:	2012
Předmět:	Toughness Materials science Metals and Alloys Sintering Condensed Matter Physics Microstructure Grain growth Fracture toughness Flexural strength Mechanics of Materials visual_art Ultimate tensile strength Materials Chemistry visual_art.visual_art_medium Ceramic Composite material
Zdroj:	Metals and Materials International. 18:545-551
ISSN:	2005-4149 1598-9623
Popis:	Alumina-reinforced zirconia composites containing 0 to 30 vol% of alumina were fabricated by sintering at 1550 °C for 2 h in air. The effect of the Al2O3 content on the mechanical properties and microstructure of 3Y-TZP ceramics was investigated. Al2O3 acted as an inhibitor of the grain growth of 3Y-TZP. As the alumina content increased, the fracture mode changed gradually from the transgranular mode to the intergranular mode and the Young’s modulus and hardness increased. The biaxial flexural strength also showed a slight increase with an increase in Al2O3 content, due to the grain size refinement of the ZrO2 matrix, while the fracture toughness, which was investigated by the SEVNB method, showed a contrary tendency. The decrement of the fracture toughness can be explained by the increase in the critical transformation stress, the decrease in the volume fraction of the transformable t-ZrO2 and the increase in the tensile residual stress.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::173a665c427fb59f2e2fae6375b77c09 https://doi.org/10.1007/s12540-012-3026-y Zobrazit plný text záznamu Full text from SpringerLink