ISO INTERNATIONAL STANDARD 18754 Third edition 2020-04 Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of density and apparent porosity Céramiquestechniques-Determinationdelamassevolumiqueetde laporositeapparente Reference number IS0 18754:2020(E) ISO @ ISO 2020 IS0 18754:2020(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2020 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 below orIso's member body in the country of therequester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland i @IS0 2020 - All rights reserved IS018754:2020(E) Contents Page Foreword .iv 1 Scope. 1 2 Normative references 1 3 Terms and definitions .1 4 Method by liquid displacement (Method A) .2 4.1 Principle 2 4.2 Apparatus 2 4.3 Test pieces 3 4.3.1 General requirements .3 4.3.2 Specificrequirementsforceramicmatrixcomposites 3 4.4 Procedure 4 Determination of the mass of the dried test piece. 4.4.1 4 4.4.2 Impregnation ofthetestpiecewiththe immersion liquid .4 4.4.3 Determinationoftheapparentmassofthetestpiece 4 4.4.4 Determination of the mass of the soaked test piece 5 4.4.5 Determination of the density of the immersion liquid 5 4.5 Accuracy of mass measurement. 5 4.6 Expression ofresults. 5 4.6.1 Apparent solid density 5 4.6.2 Bulkdensity 6 4.6.3 Apparent porosity. 6 5 Method by measurement of dimensions and mass (Method B) 6 .6 5.1 Principle.. 5.2 Apparatus. 6 5.3 Testpieces. 7 5.3.1 Generalrequirements .7 5.3.2 Specificrequirementsfor ceramicmatrixcomposites .7 5.4 Procedure 8 5.4.1 Determination of themass ofthe dried test pieces .8 5.4.2 Determination ofthedimensionsofthedriedtestpieces .8 5.5 Expression of results. .8 6 Test report. .8 Bibliography 10 IS0 2020-All rights reserved iii