ČSN EN ISO 23146   (727514) Jemná keramika (speciální keramika, speciální technická keramika) - Zkušební metody stanovení lomové houževnatosti monolitické keramiky - Část 5: Metoda zkoušky v ohybu s V-zářezem (SEVNB)

Anotace textu normy ČSN EN ISO 23146   (727514)

This Standard 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 this Standard 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.