ČSN EN ISO 17142   (727584) Jemná keramika (speciální keramika, speciální technická keramika) - Mechanické vlastnosti keramických kompozitů při vysoké teplotě na vzduchu při atmosférickém tlaku - Stanovení únavových vlastností při konstantní amplitudě

Anotace textu normy ČSN EN ISO 17142   (727584)

This Standard specifies the conditions for the determination of properties at constantamplitude of load or strain in uniaxial tension/tension or in uniaxial tension/compression cyclic fatigue of ceramic matrix composite materials (CMCs) with fibre reinforcement for temperature up to 1 700 °C in air at atmospheric pressure.

This Standard applies to all ceramic matrix composites with fibre reinforcement, unidirectional (1D), bi-directional (2D), and tri-directional (xD, where 2 < x <= 3).

The purpose of this International Standard is to determine the behaviour of CMC when subjected to mechanical fatigue and oxidation simultaneously. Tests for the determination of fatigue properties at high temperature in inert atmospheres differ from those in oxidative atmospheres. Contrary to an inert atmosphere, damage in an oxidative atmosphere accumulates due to the influence of purely mechanical fatigue and to chemical effects of the material´s oxidation