精细陶瓷(高级陶瓷、高级工业陶瓷).单片陶瓷断裂韧度的试验方法.单边V形切口束(SEVNB)法

[中文适用范围]： 本国际标准规定了先进技术陶瓷断裂韧性的测定方法。 该程序使用单边 V 形切口钢筋，以四点弯曲方式加载直至失效。 它适用于晶粒尺寸或主要微观结构特征尺寸大于约1μm的整体陶瓷。 不推荐使用氧化钇四方氧化锆多晶材料（Y-TZP）的本国际标准。 该方法也可能不适用于其他一些非常坚韧或柔软的陶瓷，其中 V 形切口根部不会形成尖锐裂纹。 [外文原描述]： ISO 23146:2012 specifies a method for the determination of the fracture toughness of advanced technical ceramics. The procedure makes use of single-edge V-notched bars, which are loaded in four-point bending until failure. It is applicable to monolithic ceramics with a grain size or major microstructural feature size larger than about 1 µm. The use of ISO 23146:2012 for yttria tetragonal zirconia polycrystal material (Y-TZP) is not recommended. The method might also be unsuitable for some other very tough or soft ceramics in which a sharp crack does not form at the root of the V-notch.