Glasindustri och keramisk industri

prEN ISO 23146 - Fine ceramics (advanced ceramics, advanced technical ceramics) — Test methods for fracture toughness of monolithic ceramics — Single-edge V-notch beam (SEVNB) method
Ämnesområden: Konstruktionskeramer
Kommittébeteckning: SIS/TK 998 (Standardiseringsarbete utan svenskt deltagande)
Källa: CEN
Svarsdatum: den 16 feb 2026
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ISO 23146:2012 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 ISO 23146:2012 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.

prEN ISO 17947-1 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Methods for chemical analysis of silicon nitride powders - Part 1: Wet chemical methods, X-ray fluorescence (XRF) using the fused cast-bead method, carrier-gas hot extraction (CGHE) and combustion methods (ISO/DIS 17947-1:2025)
Ämnesområden: Konstruktionskeramer
Kommittébeteckning: SIS/TK 998 (Standardiseringsarbete utan svenskt deltagande)
Källa: CEN
Svarsdatum: den 6 mar 2026
Detaljer om förslaget
Se merSe mindre
 

This document specifies the methods for the chemical analysis of fine silicon nitride powders used as the raw material for fine ceramics. It stipulates the determination methods of total silicon, total nitrogen, aluminium, iron, calcium, oxygen, carbon, fluorine, and chlorine in fine silicon nitride powders.