NF EN ISO 20502

NF EN ISO 20502

June 2016
Standard Current

Fine ceramics (advanced ceramics, advances technical ceramics) - Determination of adhesion of ceramic coatings by scratch testing

ISO 20502:2005 describes a method of testing ceramic coatings by scratching with a diamond stylus. During a test, either a constant or increasing force normal to the surface under test is applied to the stylus, so as to promote adhesive and/or cohesive failure of the coating-substrate system. The test method is suitable for evaluating ceramic coatings up to a thickness of 20 micrometres and might also be suitable for evaluating other coating types and thicknesses.

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Main informations

Collections

National standards and national normative documents

Publication date

June 2016

Number of pages

38 p.

Reference

NF EN ISO 20502

ICS Codes

81.060.30   Advanced ceramics

Classification index

A92-815

Print number

1

International kinship

ISO 20502:2005

European kinship

EN ISO 20502:2016
Sumary
Fine ceramics (advanced ceramics, advances technical ceramics) - Determination of adhesion of ceramic coatings by scratch testing

ISO 20502:2005 describes a method of testing ceramic coatings by scratching with a diamond stylus. During a test, either a constant or increasing force normal to the surface under test is applied to the stylus, so as to promote adhesive and/or cohesive failure of the coating-substrate system. The test method is suitable for evaluating ceramic coatings up to a thickness of 20 micrometres and might also be suitable for evaluating other coating types and thicknesses.

Replaced standards (1)
NF EN 1071-3
November 2005
Standard Cancelled
Advanced technical ceramics - Methods of test for ceramic coatings - Part 3 : determination of adhesion and other mechanical failure modes by a scratch test

Le présent document décrit une méthode destinée à soumettre à essai les revêtements céramiques en les rayant avec un stylet diamanté chargé de manière à provoquer une rupture adhésive et/ou cohésive du système revêtement-substrat. L'essai permet d'évaluer des revêtements céramiques dont l'épaisseur va jusqu'à 20 mi m et il peut aussi permettre d'évaluer d'autres types de revêtements et d'autres épaisseurs. L'essai est destiné à des spécimens de rugosité superficielle limitée. Le présent document est destiné à être utilisé dans la plage des macro-charges (de 1 N à 100 N). Les modes opératoires peuvent également être applicables à d'autres plages. Un étalonnage approprié est toutefois nécessaire si les charges normales auxquelles se produisent les ruptures sont à quantifier.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Principe
  • 4 Appareillage et matériaux
  • 5 Préparation de l'éprouvette
  • 6 Mode opératoire d'essai
  • 7 Répétabilité et limites
  • 8 Rapport d'essai
  • Annexe A(normative) Mode opératoire d'étalonnage d'un système d'essai de rayure
  • Annexe B(informative) Modes de rupture typiques obtenus dans un essai de rayure
  • Bibliographie
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