BS ISO 21618:2019 PDF

What is ISO 21618 about?

ISO 21618 describes a test method that covers the determination of fracture resistance of monolithic ceramics at room temperature by the indentation fracture (IF) method. The IF method is only applicable to dense ceramics. But if it is necessary to evaluate slightly porous ceramics through the IF method, the porosity shall be described in the test report to show the precision of measurements. ISO 21618 is intended for use with dense monolithic ceramics and whisker- or particulate reinforced ceramics which are regarded as macroscopically homogeneous. It does not include monolithic silicon nitride ceramics for bearing balls and continuous-fibre-reinforced ceramics composites. Indentation fracture resistance as defined in this document is not to be equated with fracture toughness determined using other test methods such as KIsc and KIpb. Who is for?  on fine ceramics is useful for: