PREN 1071-10 : DRAFT 2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
   5.1 Scanning electron microscope (SEM)
   5.2 Optical microscope
6 Sample preparation
   6.1 Cross-section preparation
   6.2 Surface roughness
   6.3 Taper of cross-section
   6.4 Specimen tilt
   6.5 Coating damage
   6.6 Rounding of edges of the coating
   6.7 Overplating
   6.8 Etching
   6.9 Smearing
7 Calibration of instruments
   7.1 Procedure
   7.2 Photography
   7.3 Measurement
   7.4 Calculation of magnification
   7.5 Poor contrast
   7.6 Magnification
   7.7 Uniformity of magnification
   7.8 Stability of magnification
8 Test procedure
   8.1 General
   8.2 Preparation of images
   8.3 Measurement
   8.4 Thickness calculation
   8.5 Correction procedures
9 Measurement uncertainty
10 Expression of results
11 Report
Annex A (informative) - General guidance on the preparation
        and measurement of cross-sections
   A.1 Introduction
   A.2 Cutting
   A.3 Mounting
   A.4 Grinding and polishing
   A.5 Use of the scanning electron microscope
Bibliography

Defines a method of measuring the thickness of ceramic coatings by means of examination of a metallographically prepared cross-section of the coating in a calibrated optical or scanning electron microscope.