ISO INTERNATIONAL STANDARD 18535 Firstedition 2016-03-15 Diamond-like carbon films Determination of friction and wear characteristics of diamond-like carbon films by ball-on-disc method Revetementsdecarboneamorphe-Déterminationdes caracteristiques de frottement et d'usure des revetements de carbone amorphe par la méthode bille sur disque Reference number IS0 18535:2016(E) ISO International Organization for Standardization @ IS0 2016 ed without license from IHS IS0 18535:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without 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. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 copyright@iso.org www.iso.org prganizationfor Standardization ensee-ZHEJIANG INST OF STANDARDIzARoISQ16- All rights reserved Not for Resale, 2016/6/2 08:36:00 etworking permitted without license from IHS IS0 18535:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..1 4 Test materials and specimen preparation .2 4.1 Materials. .2 4.2 Ball specimen .2 4.3 Disc specimen .2 5 Apparatus. .3 6 Testing procedure .4 6.1 Treatment of specimen before test ..4 6.2 Preparation of wear test .4 6.3 Testing conditions for friction test. ..4 6.4 Testing conditions for friction and weartest 4 6.5 Measurement of friction force .4 6.6 Measurement of wear scar on ball specimen .5 6.7 Measurement of wear scar on disc specimen ..5 6.8 Number of test repeats .5 7 Calculation of test results .6 7.1 Specific wear rate of diamond-like carbon films on ball specimen .6 7.2 Specific wear rate of diamond-like carbon films on disc specimen .6 7.3 Coefficient of friction 1 7.4 Rounding off of numerical values 7 8 Test report .7 Annex A (informative) Uncertainty of measurement for calculating of coefficient of friction .9 Bibliography .12 iii =ZHEJIANG INSTOF STANDARDIZATION C15956617 vided by IHS under thout license from IHS