NF EN ISO 18756

NF EN ISO 18756

December 2005
Standard Current

Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of fracture toughness of monolithic ceramics at room temperature by the surface crack in flexure (SCF) method

ISO 18756:2003 describes a test method that covers the determination of fracture toughness of monolithic ceramic materials at room temperature by the surface crack in flexure (SCF) method. This International Standard is intended for use with monolithic ceramics and whisker- or particulate-reinforced ceramics that are regarded as macroscopically homogeneous. It does not include continuous-fiber reinforced ceramic composites. The test method is applicable to materials with either flat or rising crack growth resistance curves.

View the extract
Main informations

Collections

National standards and national normative documents

Publication date

December 2005

Number of pages

37 p.

Reference

NF EN ISO 18756

ICS Codes

81.060.30   Advanced ceramics

Classification index

B41-217

Print number

1 - 29/11/2005

International kinship

European kinship

EN ISO 18756:2005
Sumary
Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of fracture toughness of monolithic ceramics at room temperature by the surface crack in flexure (SCF) method

ISO 18756:2003 describes a test method that covers the determination of fracture toughness of monolithic ceramic materials at room temperature by the surface crack in flexure (SCF) method.

This International Standard is intended for use with monolithic ceramics and whisker- or particulate-reinforced ceramics that are regarded as macroscopically homogeneous. It does not include continuous-fiber reinforced ceramic composites.

The test method is applicable to materials with either flat or rising crack growth resistance curves.

Table of contents
View the extract
  • Avant-propos
    iv
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Symboles
    3
  • 5 Principe
    4
  • 6 Appareillage
    5
  • 7 Éprouvettes
    6
  • 7.1 Dimensions de l'éprouvette, préparation de l'éprouvette et chanfreinage des arêtes
    6
  • 7.2 Nombre d'éprouvettes
    6
  • 8 Mode opératoire
    7
  • 8.1 Introduction de la préfissure par empreinte Knoop
    7
  • 8.2 Rupture de l'éprouvette
    11
  • 8.3 Mesurage des dimensions de la fissure
    12
  • 8.4 Effets dus au milieu ambiant
    13
  • 8.5 Option: estimation du comportement de courbe R
    14
  • 8.6 Option: matériaux de référence
    14
  • 9 Calcul
    14
  • 10 Rapport d'essai
    16
  • Annexe A (informative) Effets dus au milieu ambiant
    17
  • Annexe B (normative) Caractérisation de la préfissure
    18
  • Annexe C (informative) Estimation de la courbe R par la méthode SCF
    25
  • Annexe D (normative) Facteurs de correction du chanfrein
    28
  • Bibliographie
    30
Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ