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Characterization of the scratch resistance of ceramic tiles

A novel approach for testing of scratch resistance of ceramic tiles and understanding of the mechanisms of material failure and removal is presented. The approach is based on the scratch test method that is routinely used in other industrial domains. The progressive load scratch test method with diamond indenter proved to be a far superior method to the EN 101 standard for adhesion testing of ceramic tiles with much higher repeatability and robustness.

Introduction

A novel approach to testing of scratch resistance of ceramic tiles and understanding of the mechanisms of material failure and removal is presented. The approach is based on the scratch test method that is routinely used in other industrial domains. The main reason for application of the scratch method for testing of ceramic tiles was replacement of the outdated ‘EN 1071 Ceramic tiles - Determination of scratch hardness of surface according to Mohs hardness scale’ standard, which proved to be too inaccurate and user subjective when applied to new advanced materials.

This application report shows experimental methods, testing conditions and results on both glazed and unglazed ceramic tiles.

A comprehensive test matrix was performed with the objective of proposing a replacement to the EN 1071 standard. The parameters of the presented test method were partially adapted from the ‘ISO 20502 Standard Fine ceramics – Determination of adhesion of ceramic coatings by Scratch testing’.

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