期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 38, 期 5, 页码 2440-2444出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2017.12.049
关键词
Fracture toughness; SEVNB method; Femtosecond laser; Molten zone; Microstructure
资金
- Yang Fan Innovative & Entrepreneurial Research Team Project of Guangdong Province of China [2016YT03C025]
- Industry-Academic-Research Collaborative Innovation Major Project of Guangzhou [201704030095]
In this paper, an ultra-sharp V-notch was produced by femtosecond laser on the green bodies of 3Y-TZP, Al2O3 and 8Y-FSZ, respectively. After sintering, the fracture toughness of those ceramic samples was tested by single edge V-notched beam (SEVNB) method. For comparison, the fracture toughness of ceramic samples with an ultra-sharp V-notch ablated by femtosecond laser directly on the sintered test bars was also determined as a regular testing route. The results reveal that the two different preparation methods of ultra-sharp V-notches can obtain the actual fracture toughness of 3Y-TZP, Al2O3 and 8Y-FSZ. It proves that the influence of thermal effect of ablation process caused by femtosecond laser in front of the notch tip on the fracture toughness can be negligible.
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