DIN EN ISO 20502-2016 Fine ceramics (advanced ceramics advanced technical ceramics) - Determination of adhesion of ceramic coatings by scratch testing (ISO 20502 2005 including Cor.pdf

1、November 2016 English price group 16No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 81.060.30!%uz“2588287www.din.de

2、DIN EN ISO 20502Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of adhesion of ceramic coatings by scratch testing (ISO 20502:2005 including Cor 1:2009);English version EN ISO 20502:2016,English translation of DIN EN ISO 20502:2016-11Hochleistungskeramik Bestimmung der H

3、aftung von keramischen Schichten mit dem Ritztest (ISO 20502:2005 einschlielich Cor 1:2009);Englische Fassung EN ISO 20502:2016,Englische bersetzung von DIN EN ISO 20502:2016-11Cramiques techniques Dtermination de ladhrence des revtements cramiques par essai de rayure (ISO 20502:2005, y compris Cor

4、1:2009);Version anglaise EN ISO 20502:2016,Traduction anglaise de DIN EN ISO 20502:2016-11SupersedesDIN EN 10713:200510www.beuth.deDocument comprises 37 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.11.16 DIN EN ISO 20502:201

5、6-11 2 A comma is used as the decimal marker. National foreword The text of ISO 20502:2005 including Cor 1:2009 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” and has been taken over as EN ISO 20502:2016 by Technical Committee CEN/TC 184 “Advanced technical ceramics” (Secretaria

6、t: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062 BR Beirat des DIN-Normenausschusses Materialprfung (NMP) since the parties concerned have not shown any interest in w

7、ork on the subject. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 4288 DIN EN ISO 4288 ISO 6508-2 DIN EN ISO 6508-2 ISO/IEC 17025 DIN EN ISO/IEC 17025 Amendments This standard differs from DIN EN 1071-3:2005-10 as follows: a) a number

8、 of NOTES have been incorporated in the normative text; b) ISO 20502:2005 including Corrigendum 1:2009 has been adopted. Previous editions DIN V ENV 1071-3: 1994-06 DIN EN 1071-3: 2005-10 National Annex NA (informative) Bibliography DIN EN ISO 4288, Geometrical Product Specifications (GPS) Surface t

9、exture: Profile method Rules and procedures for the assessment of surface texture DIN EN ISO 6508-2, Metallic materials Rockwell hardness test Part 2: Verification and calibration of testing machines and indenters DIN EN ISO/IEC 17025, General requirements for the competence of testing and calibrati

10、on laboratories EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 20502 April 2016 ICS 81.060.30 Supersedes EN 1071-3:2005English Version Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of adhesion of ceramic coatings by scratch testing (ISO 20502:2005 including

11、 Cor 1:2009)Cramiques techniques - Dtermination de ladhrence des revtements cramiques par essai de rayure(ISO 20502:2005, y compris Cor 1:2009) Hochleistungskeramik - Bestimmung der Haftung von keramischen Schichten mit dem Ritztest(ISO 20502:2005 einschlielich Cor 1:2009) This European Standard was

12、 approved by CEN on 18 March 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nati

13、onal standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own langu

14、age and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

15、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-

16、CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 20502:2016 EContents Page European foreword 3 1 Scope . 5 2 Normative references . 5 3 Principle. 5 4 Apparatus a

17、nd materials 6 4.1 Scratch tester 6 4.2 Diamond stylus . 6 5 Preparation of test piece 7 5.1 General requirements. 7 5.2 Surface roughness, waviness and levelling 7 5.3 Specimen cleaning . 7 5.4 Coating-substrate parameters relevant to a test. 8 6 Test procedure 8 6.1 General. 8 6.2 Equipment prepar

18、ation. 8 6.3 Environmental conditions 9 6.4 Scratching procedure. 9 6.4.1 General. 9 6.4.2 Progressive-force scratch test 9 6.4.3 Constant-force scratch test . 9 6.4.4 Multi-pass scratch test. 9 6.5 Scratch evaluation and critical normal-force determination 10 6.5.1 General. 10 6.5.2 Microscope obse

19、rvation 10 6.5.3 Acoustic emission (AE) and frictional force (FF) recording. 10 7 Repeatability and limits 11 8 Test report . 11 Annex A (normative) Procedure for calibration of a scratch testing system 16 Annex B (informative) Typical failure modes obtained in scratch testing . 23 Bibliography . 35

20、 DIN EN ISO 20502:2016-11EN ISO 20502:2016 (E) 2Foreword. 4 European foreword The text of ISO 20502:2005 including Cor 1:2009, has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 20502:2016

21、by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2016, and conflicting national stan

22、dards shall be withdrawn at the latest by October 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 10

23、71-3:2005. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

24、France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 20502:2005 including Cor 1:2009, has been

25、 approved by CEN as EN ISO 20502:2016 without any modification. DIN EN ISO 20502:2016-11EN ISO 20502:2016 (E)3 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards i

26、s 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 organizations, governmental and non-governmental, in liaison with ISO, also take par

27、t in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to p

28、repare 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 tha

29、t 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. ISO 20502 was prepared by Technical Committee ISO/TC 206, Fine ceramics. DIN EN ISO 20502:2016-11EN ISO 20502:2016 (E) 4 1 Scope This Internat

30、ional Standard describes a method of testing ceramic coatings by scratching with a diamond stylus. During a test, either a constant or increasing force normal to the surface under test is applied to the stylus so as to promote adhesive and/or cohesive failure of the coating-substrate system. The tes

31、t method is suitable for evaluating ceramic coatings up to a thickness of 20 m and might also be suitable for evaluating other coating types and thicknesses. The International Standard is intended for use in the macro (1 to 100 N) force range. The procedures may also be applicable to other force ran

32、ges. However, appropriate calibration is essential if the normal forces at which failure occurs are to be quantified. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated re

33、ferences, the latest edition of the referenced document (including any amendments) applies. ISO 4288, Geometric Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture ISO 6508-2, Metallic materials Rockwell hardness test Part 2: Verifi

34、cation and calibration of testing machines (scales A, B, C, D, E, F, G, H, K, N, T) ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories 3 Principle The scratch test is designed for the assessment of the mechanical integrity of coated surfaces. The test meth

35、od consists of generating scratches with a stylus of defined shape (usually a diamond with a Rockwell C geometry) by drawing it across the surface of the coating-substrate system to be tested, either under a constant or progressive normal force (see Figure 1). Failure events are detected by direct m

36、icroscopic observation of the scratch and sometimes by using acoustic emission and/or friction force measurement. The driving forces for the failure of the coating-substrate system in the scratch test are a combination of elastic-plastic indentation stresses, frictional stresses and the residual int

37、ernal stress present in the coating. The normal force at which failure occurs is called the critical normal force Lc. NOTE 1 The term “critical load” is frequently used in place of “critical normal force”. The use of the term “critical load” is deprecated because the failure is typically initiated b

38、y the application of a force rather than a load. DIN EN ISO 20502:2016-11EN ISO 20502:2016 (E)5 NOTE 2 In a scratch, a number of consecutive coating-failure events may be observed at increasing critical normal-force values. Failure by cracking through the coating thickness (through-thickness crackin

39、g) usually occurs at lower normal forces than detachment of the coating. Therefore, it is quite common to characterize the onset of cracking by the critical normal force Lc1, while the onset of coating detachment defines the critical normal force Lc2. In general, a series of failure modes are observ

40、ed and used to study the mechanical behaviour of the coated surface, where the onset of the nth failure mode defines the critical normal force Lcn(see Figure 2). NOTE 3 The critical normal forces at which the failure events appear depend not only on the coating adhesion strength but also on other pa

41、rameters, such as rate of increase of normal force, traverse speed, diamond-tip wear, substrate and coating roughness, some of which are directly related to the test itself, while others are related to the coating-substrate system. 4 Apparatus and materials 4.1 Scratch tester A scratch tester is an

42、instrument used to rigidly hold the stylus and to apply both the normal force and the driving force to produce scratches. A schematic of a typical arrangement is shown in Figure 3. NOTE 1 In general, spring-deformation-controlled normal-force instruments are used in which the deformation of a spring

43、 is used to achieve the chosen force programme. Magnetically driven assemblies are also available. Where required, the scratch tester can be equipped with acoustic emission (AE) and/or friction force (FF) transducers. NOTE 2 Although it is attractive to use such methods for the on-line automatic qua

44、lity control of coated parts, these techniques cannot discriminate between cohesive and adhesive failures, nor do they always detect the first occurrence of failure. Hence, AE and FF signals cannot be used as a reliable means for determining scratch-test critical normal forces. These techniques can

45、at best be used as a warning system in the quality control of coated components, and then only after a large series of experiments on the same coating type to establish the statistics of correlation with a certain failure mode. Inspection of the scratch track by microscopic observation remains the o

46、nly reliable means of associating a failure event with a measured critical normal force. To meet the requirements of this International Standard, scratch testers shall comply with the calibration requirements of Annex A. 4.2 Diamond stylus This consists of a rigidly mounted diamond normally having a

47、 Rockwell C geometry in accordance with the requirements of ISO 6508-2. The stylus shall be inspected regularly to check for contamination and changes in geometry. If damage is observed at 200 or lower magnification then the stylus shall be changed (see Reference 1), and if either damage or contamin

48、ation is observed, the test results since the last inspection shall be disregarded. If the friction force increases at a constant normal force during operation, this is a presumption of contamination of the stylus. NOTE 1 Uncertainties in the Rockwell C stylus tip shape and manufacturing defects are a major source of error for the scratch test method. The use of an imperfect stylus may result in different values of critical normal force when the stylus is rotated in its holder. Control of the stylus shape is imperative,