Glasindustri och keramisk industri

This document specifies two test methods for the determination of the resistance of the edges of brittle ceramic materials to be damaged by chipping. This document is applicable to homogeneous monolithic ceramics with flat surfaces and straight sharp or chamfered edges.

This document specifies a method for the determination of subcritical crack growth parameters of advanced monolithic technical ceramics in the temperature range 15 °C to 30 °C by measuring the dependence of mean flexural strength on the rate of loading. The method is based on strength test procedures described in EN 843 1. The applicability of this method is limited by specific requirements for a low scatter of the initial strength of the test pieces and an upper limit of the stress load rate for the data points considered. This document is not applicable to test pieces with artificially introduced flaws or cracks.

This document describes the flash method for the determination of thermal diffusivity of ceramic matrix composites with continuous fibre reinforcement. In order to conform with the unidimensional heat transfer hypothesis, the experimental conditions are defined such that the material behaves in a homogeneous manner. This involves performing tests in one symmetry axis of the composite. The method is applicable to materials which are physically and chemically stable during the measurement, and covers the range of temperature from 100 K to 2 800 K. It is suitable for the measurement of thermal diffusivity values in the range 10−4 m2∙s−1 to 10−7 m2∙s−1.