Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7898857 | Journal of the European Ceramic Society | 2018 | 6 Pages |
Abstract
A novel composite of 12 mol% CeO2-stablized tetragonal ZrO2 reinforced with Al2O3 whiskers (designated as Ce-TZP/Aw) has been prepared and studied in this work. The objective of this investigation was to systematically study the influence of whisker-aspect-ratio on the densification behaviors, microstructure evolution, and mechanical properties of Ce-TZP/Aw composite. Results showed that the sintered density of composite increased and the grain growth tended to diminish with the decrease in whisker aspect radio. Both the fracture toughness and flexural strength reached maximum values of 475 ± 12 MPa and 11.4 ± 0.2 MPa m1/2, respectively at a whisker aspect ratio of about 12. It was also observed that the fracture toughness, flexural strength and tetragonal to monoclinic ZrO2 transformation of the dual-phase composite exhibited similar variation trend as a function of the whisker-aspect-ratio, which suggested that the stress-induced phase transformation should be the main toughening and strengthening mechanism in the Ce-TZP/Aw composite.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Fei Zuo, Fan Meng, Dong-Tao Lin, Jun-Jie Yu, Hong-Jian Wang, Shen Xu, Wei-Ming Guo, Carmen Cerecedo, VÃctor Valcárcel, Hua-Tay Lin,