EN 1071-3:2005

Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Apparatus and materials
  4.1 Scratch tester
  4.2 Diamond stylus
5 Preparation of the test piece
  5.1 General requirements
  5.2 Surface roughness, waviness and levelling
  5.3 Specimen cleaning
  5.4 Coating-substrate specific parameters
6 Test procedure
  6.1 General
  6.2 Equipment preparation
  6.3 Environmental conditions
  6.4 Scratching procedure
  6.5 Scratch evaluation and critical load
      determination
  6.6 Microscope observation
  6.7 Acoustic emission (AE) and frictional force
      (FF) recording
7 Repeatability and limits
8 Test report
Annex A (normative) Procedure for calibration of a
                      scratch testing system
  A.1 Introduction
  A.2 Scope
  A.3 Principle
  A.4 Apparatus
  A.5 Calibration procedures
  A.6 Recording results
Annex B (informative) Typical failure modes obtained
                      in scratch testing
  B.1 Introduction
  B.2 Experimental
  B.3 Results
  B.4 Conclusions
  B.5 The scratch test atlas of failure
      modes
Bibliography

This Part of EN 1071 describes a method of testing ceramic coatings by scratching with a loaded diamond stylus so as to promote adhesive and/or cohesive failure of the coating-substrate system. The test is suitable for evaluating ceramic coatings up to a thickness of 20 µm and can also be suitable for evaluating other coating types and thicknesses. The test is intended for use with specimens of limited surface roughness.This European Standard is intended for use in the macro (1 N - 100 N) load range. The procedures can also be applicable to other load ranges. However, appropriate calibration is essential if the normal loads at which failure events occur are to be quantified.