BS ISO 19603-2016 Fine ceramics (advanced ceramics advanced technical ceramics) Test method for determining elastic modulus and bending strength of thick ceramic coatings《精细陶瓷(高级陶瓷.pdf

1、BS ISO 19603:2016Fine ceramics (advancedceramics, advanced technicalceramics) Test method fordetermining elastic modulusand bending strength of thickceramic coatingsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 19603:2016 BRITISH STANDARDNational forewordThi

2、s British Standard is the UK implementation of ISO 19603:2016.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 p

3、urport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 86513 8 ICS 81.060.30 Compliance with a British Standard cannot confer immunity from legal obl

4、igations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 19603:2016 ISO 2016Fine ceramics (advanced ceramics, advanced technical ceramics) Test

5、method for determining elastic modulus and bending strength of thick ceramic coatingsCramiques techniques Mthode dessai relative la dtermination du module lastique et de la rsistance en flexion des revtements de cramique paisINTERNATIONAL STANDARDISO19603First edition2016-11-01Reference numberISO 19

6、603:2016(E)BS ISO 19603:2016ISO 19603:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll 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 m

7、echanical, 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 ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva,

8、SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 19603:2016ISO 19603:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols 25 Principle 26 Apparatus . 37 Test pieces . 37.1 Test piece size 37.2 Test piece preparation 47.2.1 Tes

9、t piece machining 47.2.2 Test piece handling and storage . 47.2.3 Number of test pieces 48 Test procedure 48.1 Testing machine and loading speed 48.2 Elastic modulus measurement 48.3 Bending strength measurement 58.4 Coating thickness measurement 68.5 Temperature and relative humidity 69 Calculation

10、 of results . 69.1 Calculation of elastic modulus . 69.1.1 Calculation of elastic modulus in bending test 69.1.2 Mean value and standard deviation for elastic modulus 79.2 Calculation of bending strength . 89.2.1 Calculation for bending strength of the ceramic coating 89.2.2 Mean value and standard

11、deviation for bending strength . 910 Analysis of precision and uncertainty 911 Test report 10Bibliography .11 ISO 2016 All rights reserved iiiContents PageBS ISO 19603:2016ISO 19603:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standard

12、s bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organiz

13、ations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its fur

14、ther maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directi

15、ves).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. Details of any patent rights identified during the development of the document will be in the In

16、troduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to

17、 conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 206, Fine ceramics.iv ISO 2016 All

18、rights reservedBS ISO 19603:2016INTERNATIONAL STANDARD ISO 19603:2016(E)Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for determining elastic modulus and bending strength of thick ceramic coatings1 ScopeThis document specifies a testing method for determining the elastic

19、 modulus and bending strength of thick ceramic coatings at ambient temperature by three-point bending tests. Procedures for test piece preparation, test modes and load rates, data collection and reporting are given.This document applies to thick, brittle coatings on metal or ceramic substrates. This

20、 test method can be used for material research, quality control, characterization and design data-generation purposes.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated referen

21、ces, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3611, Geometrical product specifications (GPS) Dimensional measuring equipment: Micrometers for external measurements Design and metrological characterist

22、icsISO 7500-1, Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system3 Terms and definitionsFor the purposes of this document, the following terms and definitions appl

23、y.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp3.1elastic modulusratio of stress to strainNote 1 to entry: Also known as

24、Youngs modulus.3.2bending strengthmaximum tensile stress at fracture under bending load3.3modulus ratioratio of the coating modulus to the substrate modulus3.4thickness ratioratio of the coating thickness to the substrate thickness ISO 2016 All rights reserved 1BS ISO 19603:2016ISO 19603:2016(E)3.5d

25、eflection ratioratio of the deflection increment of uncoated substrate to the deflection increment of coated test piece under a given load increment for three-point bending test4 SymbolsFor the purposes of this document, the symbols and designations given in Table 1 apply.Table 1 Symbols and designa

26、tionsSymbol Designation Unit ReferencesH Thickness of substrate mmFigure 1 Formula (1)h Thickness of coating mm Figure 1B Width of test piece mm Figure 1P Peak load N Figure 2L Span of test piece mmFormula (1) Formula (5)E Elastic modulus GPa Formula (1)EcElastic modulus of coating GPa Formula (2)Es

27、Elastic modulus of substrate GPa Formula (2)Ratio of the elastic modulus of the coating to that of the substrateFormula (2) Formula (5)f Deflection mm Formula (1) cBending strength of coating MPa Formula (5)PcCritical fracture load N Formula (5)ycDistance from the tensile surface to the neutral axis

28、 mm Formula (5)I Moment of inertia of the test pieces mm4Formula (5)P Load increment N Formula (1)f Deflection increment mm Formula (1)n Effective test number numericalFormula (3) Formula (4) Formula (6) Formula (7)Mean value of bending strength MPaFormula (6) Formula (7)iBending strength of the ith

29、 test piece MPaFormula (6) Formula (7)EMean value of elastic modulus GPaFormula (3) Formula (4)EiElastic modulus of the ith test piece GPaFormula (3) Formula (4)seStandard deviation of measured elastic modulus GPa Formula (4)sStandard deviation of measured bending strength MPa Formula (7)5 Principle

30、The elastic modulus and bending strength of thick ceramic coatings on metal or ceramic substrates can be evaluated using three-point bending tests. The elastic modulus of the coating is deduced by comparing the deformation of a coated test piece and of the uncoated substrate under identical loads. A

31、 precondition of this method is that the elastic modulus of the substrate is known or can be measured 2 ISO 2016 All rights reservedBS ISO 19603:2016ISO 19603:2016(E)before or after the test. The bending strength of the coating is determined using the critical load for cracking in the coating and th

32、e sample size. This indirect test method is called the relative method.6 Apparatus6.1 Testing machineA suitable testing machine capable of applying a uniform crosshead speed and compliant with ISO 7500-1 shall be used. The loading speed should be constant. The measuring error shall be 1 % or lower.6

33、.2 Data acquisitionRecord the applied load as a function of crosshead displacement or testing time in order to determine the maximum applied load.An analog chart recorder or digital data collection system should be used. The error of the recording system shall be 1 % or lower. The minimum data colle

34、ction frequency shall be 15 Hz, and a response frequency of 50 Hz is deemed adequate.6.3 Dimensional measuring devicesThe dimensions of the test piece shall be measured using a Vernier caliper complying with ISO 3611 and with a precision of 0,02 mm or better, or other calibrated measuring device pro

35、viding the same or better measurement accuracy. Coating thickness shall be measured by using a calibrated optical microscope with magnification of 1 000 times or better. Sample displacement shall be measured using a calibrated electronic micrometer with a precision of at least 0,001 mm and resolutio

36、n of 0,000 5 mm or better, or other measuring device providing the same or better measurement accuracy. All calibrations shall be traceable to national standards.7 Test pieces7.1 Test piece sizeIn order to simplify the preparation of test pieces, rectangular section test pieces with three different

37、coating configurations are considered: coating on lower surface of the test pieces only single-face coating, Figure 1 a), coating on upper and lower surfaces of the test pieces only two-face coating, Figure 1 b) and coating on four surfaces of a test pieces around coating, Figure 1 c). Any of the th

38、ree coating configurations may be used for evaluating the properties of the coating layer. The geometrical dimensions of coated test piece are displayed in Figure 1. Test piece dimensions shall be 36 mm long, 4 mm wide and 2 mm thick or larger with the same dimensional ratio. The thickness ratio, h/

39、H, should be larger than 1/100. The thickness of the coating shall be larger than 20 m.a) Single-face coating b) Two-face coating c) Around coatingKey1 substrateFigure 1 Schematic of cross-section of test piece with different coating configurations ISO 2016 All rights reserved 3BS ISO 19603:2016ISO

40、19603:2016(E)7.2 Test piece preparation7.2.1 Test piece machiningThe test pieces may be obtained from two approaches.a) The test pieces are cut from some coated components, carefully grinding and polishing the test piece to keep the surfaces parallel and flat.b) The test pieces are prepared by coati

41、ng a substrate; in this case, the modulus of the substrate shall be measured before preparing coating.The detail test procedure is described below.Before applying the coating, mark each test piece substrate with a unique identifier which will be visible after coating. Measure the flatness of each un

42、coated test piece, for example, by mounting in an unstressed state on the x-y stage of a calibrated optical microscope and measuring the z coordinate of the surface with an accuracy of 2 m at 10 equally spaced positions along its length. Record the results for each test piece.For both single-face an

43、d two-face coating, carefully mask the faces to remain free from coating, ensuring that the masking material does not prevent the coating from completely covering the faces to be coated. Coat the test pieces using the processing conditions of interest, taking care to obtain the same coating thicknes

44、s on all faces of interest. If necessary, coat an extra test piece using the same processing parameters and measure the coating thickness on this to determine coating uniformity prior to starting modulus and bending strength measurements. If the observed non-uniformity in coating thickness on differ

45、ent faces is greater than 5 % between the thickest and the thinnest values measured, new test piece should be prepared. Remove the masking from the uncoated faces and repeat the flatness measurement for each test piece and record the results.7.2.2 Test piece handling and storageThe test pieces shall

46、 be handled with care to avoid the introduction of damage after test piece preparation. The test pieces shall be stored separately and not allowed to impact or scratch each other.7.2.3 Number of test piecesA minimum of 6 test pieces are required for the test; the maximum load for fracture could be e

47、stimated by using the first test piece.Minimum of 30 test pieces is recommended if a statistical bending strength analysis (e.g. a Weibull analysis) is to be made. The use of 30 test pieces will help obtain good confidence limits for the elastic modulus and bending strength distribution parameters i

48、ncluding a Weibull modulus.8 Test procedure8.1 Testing machine and loading speedUse a universal mechanical testing machine with a crosshead speed of 0,5 mm/min for the three-point bending tests.8.2 Elastic modulus measurementThe elastic modulus of the substrate should be known or should be measured

49、using an uncoated sample.The elastic modulus of a homogenous material can be calculated through the ratio of load increment, P, to deflection increment, f, at the mid-span of a rectangular beam specimen in three-point bending.4 ISO 2016 All rights reservedBS ISO 19603:2016ISO 19603:2016(E)ELHBPf=3341000(1)whereE is the elastic modulus, in GPa;L is the span of test pieces, in mm;H is the thickness of test pieces, in mm;B is the width of test pieces, in mm;P is the load increment within the scope o