ISO INTERNATIONAL STANDARD 26424 First edition 2008-11-01 Fine ceramics (advanced ceramics, advanced technical ceramics) Determinationoftheabrasionresistance of coatings by a micro-scale abrasion test CeramiquestechniquesDetermination delaresistanceaI'abrasion desrevetementsparessaid'abrasionamicro-échelle Referencenumber ISO 26424:2008(E) @ISO2008 ISO26424:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2008 - All rights reserved ISO26424:2008(E) Contents Page Foreword. IV 1 Scope 2 Normative references 3 Terms and definitions. 4 Significance and use ... 5 Principle... 6 Apparatus and materials... 6.1 Test system... 6.2 Testballs. 6.3 Abrasive slurry.... 6.4 Measurementofcraterdimensions 7 Preparationoftestpieces 8 Testprocedure 8.1 Different types of test.. 8.1.1 Type A: no perforation of coating 8.1.2 Type B: perforation of coating .... 8.2 Type Atest: no perforation of coating.. 8.3 Type B test: perforation of coating .... 9 Analysisofresults 9.1 Type A test: no perforation of coating. 8 9.1.1 Basic equations .. 9.1.2 Calculation of Kc 9.2 Type B test: perforation of coating. 9.2.1 Basiceguations 9 9.2.2 Calculation of Kc and Ks 10 10 Testreproducibility,repeatabilityandlimits 10 10.1 Reproducibility and repeatability.... 10 10.2 Limits... 11 11 Test report 13 AnnexA(informative)Measurementofcoatingthickness 14 Bibliography 15 @ IS0 2008 - All rights reserved ii ISO26424:2008(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO26424waspreparedbyTechnical CommitteeISO/TC206,Fineceramics iv @ISO 2008-Allrights reserved INTERNATIONALSTANDARD ISO26424:2008(E) Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of the abrasion resistance of coatingsbya micro-scaleabrasiontest Scope 1 means of a micro-scale abrasion wear test based on the well-known crater-grinding technique used for coating thickness determination in ISO 26423 [11]. The method can provide data on both coating and substrate wear rates, either by performing two separate tests or by careful analysis of the data from a single test series. in Clause 9 applies only to flat samples. For non-planar samples, a more complicated analysis, possibly requiring the use of numerical methods, is required. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the editio