ISO 21618:2019
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for fracture resistance of monolithic ceramics at room temperature by indentation fracture (IF) method
Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for fracture resistance of monolithic ceramics at room temperature by indentation fracture (IF) method
This document describes a test method that covers the determination of fracture resistance of monolithic ceramics at room temperature by the indentation fracture (IF) method. This document is intended for use with dense monolithic ceramics and whisker- or particulate-reinforced ceramics which are regarded as macroscopically homogeneous. It does not include monolithic silicon nitride ceramics for bearing balls and continuous-fibre-reinforced ceramics composites. This document is for material development, material comparison, quality assurance, characterization and reliability data generation. Indentation fracture resistance, KI,IFR, as defined in this document is not to be equated with fracture toughness determined using other test methods such as KIsc and KIpb. NOTE KI,IFR is an estimate of a material's resistance to cracking as introduced by an indenter and has correlations with wear resistance and rolling contact fatigue performance as well as machining processes, since these properties are governed by the resistance to crack extension in localized damage areas[1]-[3]. By contrast, fracture toughness properties KIsc and KIpb are intrinsic properties of a material and are relevant to macroscopic and catastrophic fracture events with long cracks rather than those phenomena caused by microscopic and successive damage accumulation associated with short cracks.
Céramiques techniques (céramiques avancées, céramiques techniques avancées) — Méthode d’essai pour déterminer la résistance à la rupture par indentation (IF) des céramiques monolithiques à température ambiante
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 21618
First edition
2019-02
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Test method for fracture resistance
of monolithic ceramics at room
temperature by indentation fracture
(IF) method
Céramiques techniques (céramiques avancées, céramiques techniques
avancées) — Méthode d’essai pour déterminer la résistance à
la rupture par indentation (IF) des céramiques monolithiques à
température ambiante
Reference number
ISO 21618:2019(E)
©
ISO 2019
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ISO 21618:2019(E)
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ii © ISO 2019 – All rights reserved
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ISO 21618:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 3
5.1 Testing machine . 3
5.2 Indenter . . 3
5.3 Verification by standard reference materials . 3
5.4 Metallurgical microscope or travelling microscope . 3
6 Test specimen . 3
6.1 Thickness . 3
6.2 Surface finish . 3
7 Procedure. 4
7.1 Specimen placement . 4
7.2 Specimen levelling . 4
7.3 Cleaning of the indenter . 4
7.4 Adjustment of stage movement .
...
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