DIN EN ISO 23146:2016-11

This International 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 International 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. The text of ISO 23146-2:2012 has been prepared by Technical Committee ISO/TC 206 "Fine ceramics" of the International Organization for Standardization (ISO) and adopted as EN ISO 23146:2016 by CEN/TC 184 "Advanced technical ceramics", the secretariat of which is held by DIN (Germany). The responsible German committee is Working Committee NA 062-02-91 AA "Terminologie von Hochleistungskeramik und Prüfung von monolithischen keramischen Werkstoffen und Pulvern" ("Terminology associated with advanced technical ceramics and testing of monolithic ceramics and powders") at DIN Standards Committee Materials Testing (NMP).