细陶瓷(高级陶瓷、高级工业陶瓷).室温下用锯齿形切口试杆(CNB)法测定单片陶瓷断裂韧性的试验方法

[中文适用范围]： 本国际标准规定了用人字形缺口梁（CNB）法测定整体陶瓷材料室温断裂韧性的试验方法。 本国际标准适用于宏观均质的整体陶瓷和晶须或颗粒增强陶瓷。 它不适用于连续纤维增强陶瓷复合材料。 本国际标准通常适用于断裂韧性小于约12 MPa(m)的陶瓷材料。 该试验方法适用于具有平坦裂纹扩展阻力曲线的材料，也可适用于具有上升裂纹扩展阻力曲线（R曲线）的材料。 [外文原描述]： ISO 24370:2005 specifies a test method for determining the fracture toughness of monolithic ceramic materials at room temperature by the chevron-notched beam (CNB) method. ISO 24370:2005 is applicable to monolithic ceramics and whisker- or particulate-reinforced ceramics that are regarded as macroscopically homogeneous. It is not applicable to continuous-fibre reinforced ceramic composites. ISO 24370:2005 is usually applicable to ceramic materials with a fracture toughness less than about 12 megapascal(square root metre). The test method is applicable to materials with a flat crack-growth resistance curve and may be applicable to materials with a rising crack-growth resistance curve (R-curve).