The single-edge V-notched beam (SEVNB) method based on the laser notching approach can effectively overcome the shortcoming of time-consuming and avoid large errors in traditional fracture toughness measurement ways, yet there is still a lack of systematic research on the normativity of V-notches as well as the applicability of ceramics with various compositions and microstructures. Taking oxide (ZrO₂ and Al₂O₃), carbide (SiC), nitride (Si₃N₄) and boride (ZrB₂-based) ceramics as the research objects, this paper systematically discussed the effects of notch tip sharpness, relative notch depth (a/W) and equivalent notch angle on the measured value of fracture toughness, thereby clearly defining the range of these parameters that is required for measuring the fracture toughness accurately. Furthermore, in order to give full play to the advantages of the laser notching method, the feasibility of sample miniaturization was also discussed. This study could provide important data reference and theoretical basis for the standardization of laser method in the future.

基于激光刻痕方法的单边V形刻痕光束（SEVNB）方法可以有效克服耗时的缺点，避免了传统断裂韧性测量方法中的较大误差，但尚缺乏规范性方面的系统研究。 V形凹口以及具有各种成分和微结构的陶瓷的适用性。以氧化物（ZrO ₂和Al ₂ O ₃），碳化物（SiC），氮化物（Si ₃ N ₄）和硼化物（ZrB ₂基）陶瓷为研究对象，系统地讨论了切口尖端锐度的影响，相对切口深度（a / W）和等效缺口角与断裂韧性测量值的对应关系，从而明确定义了精确测量断裂韧性所需的这些参数的范围。此外，为了充分发挥激光刻痕方法的优势，还讨论了样品小型化的可行性。该研究可为今后激光方法的标准化提供重要的数据参考和理论依据。