BS ISO 20808:2016 BSl Standards Publication Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of friction and wear characteristics of monolithic ceramics by ball-on-disc method bsi. BS ISO 20808:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 20808:2016. The UK participation in its preparation was entrusted to Technical Committee RPI/13, Advanced technical ceramics. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016 Published by BSIStandards Limited 2016 ISBN9780580903915 ICS 81.060.30 Compliance witha BritishStandard cannot confer immunityfrom legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2016. Amendments/corrigendaissued sincepublication Date Text affected BSISO20808:2016 ISO 20808 INTERNATIONAL STANDARD Second edition 2016-07-15 Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of friction and wear characteristics of monolithic ceramics by ball-on-disc method Ceramiques techniques-Détermination des caracteristiques de frottementetd'usure des ceramiques monolithiquespar la methode "bille surdisque" ISORebgeg:20umbey (so @ ISO 2016 BS ISO20808:2016 IS020808:2016(E) COPYRIGHTPROTECTEDDOCUMENT ISO2016, Published in Switzerland AHbyghty rasansedlalestronicotherwipenifiedlaniclaindfiuthisgpplbbicatbpyimgyoltqnsthgintprndtioedntnttiaet) otineamyisovithout prior written permission. Permission can be requested from either ISO at the address below or ISo's member body in the country of the requester. fsodecparibh Reics 3·CP401 CH-1214 Vernier, Geneva, Switzerland Tel. +4122 749 01 11 Fax +41 22 749 09 [email protected] 47 www.iso.org ii @ IS0 2016 - All rights reserved BS ISO 20808:2016 IS0 20808:2016(E) Contents Page Foreword iv Scope 1 2 Normative references .1 3 Terms and definitions 1 4 Significance and use 2 5 Test materials and specimen preparation 2 5.1 2 Materials 5.2 Ball specimen 3 6 3 Apparatus. 7 Testing procedure 4 7.1 Determination of specimen density 7.2 Treatment of specimen beforetest. 4 7.3 Meqanetimentfofweasstdsefore.test 4 7.5 Testing conditions .4 7.6 Measurement offriction force 5 3:3 Measurement of mass after test 5 wearscar on ball specimen 7.9 Measurementofweartrack on disc specimen 5 7.10 Number of test repeats 8 Calculation of test results 6 8.1 Specific wearrate of ball specimen 8.1.1 Specific wear rate according to wear volume 6 8.2 Sjecificpecifatefrdtesjaecondimg.to.mass.loss 8 8.2.1 Specific wearrate according towear volume .8 8.2.2 Specificwearrateaccordingto mass loss 9 9 Test report. .10 Bibliography .11 @ IS0 2016-All rights reserved ili BS ISO 20808:2016 IS0 20808:2016(E) Foreword Iso (the International Organization for Standardization)is a worldwide federation of national standards thdiegh(Iso tecbmioet cobiasiftahsewofkahf peapbringbodyInittetesitedaihStandebjdstisfoowhidhycarrtiechaital committeehasbeen established hastherighttoberepresentedonthatcommittee.International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. ISO collaborates closely withthe electrotechnical standardization.International Electrotechnical Commission (IEC)on allmatters of The procedures used to develop this document and those intended for its further maintenance are editorialrulesof theIsO/IEC Directives,Part2 (seewww.iso.org/directives). Rttentionrights.dswfstan nbepbsltbthayresponsibhefelementrryfng alyshsh'docmaxhptheRffgits. subject of on the Iso list of patent declarations received (see www.iso.org/patents) Anytrade used in this constitute nameendorsement. document is information given for the convenience of users and does not For an explanation on the mea