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.

本文用飞秒激光分别在3Y-TZP，Al ₂ O ₃和8Y-FSZ的生坯上产生了一个超锐利的V型缺口。烧结后，通过单边缘V型缺口梁（SEVNB）方法测试这些陶瓷样品的断裂韧性。为了进行比较，还确定了用飞秒激光直接烧蚀在烧结测试棒上的具有超尖锐V型缺口的陶瓷样品的断裂韧性，作为常规测试途径。结果表明，两种不同的超锋利V形缺口制备方法均可获得3Y-TZP，Al ₂ O ₃的实际断裂韧度。和8Y-FSZ。事实证明，飞秒激光在缺口尖端前引起的烧蚀过程的热效应对断裂韧性的影响可以忽略不计。