DIN EN ISO 26443-2016 Fine ceramics (advanced ceramics advanced technical ceramics) - Rockwell indentation test for evaluation of adhesion of ceramic coatings (ISO 26443 2008) Germ.pdf

1、September 2016 English price group 10No 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!%ZU“2559650www.din.d

2、eDIN EN ISO 26443Fine ceramics (advanced ceramics, advanced technical ceramics) Rockwell indentation test for evaluation of adhesion of ceramic coatings (ISO 26443:2008);English version EN ISO 26443:2016,English translation of DIN EN ISO 26443:2016-09Hochleistungskeramik RockwellEindringprfung zur B

3、ewertung der Haftung von keramischen Schichten (ISO 26443:2008);Englische Fassung EN ISO 26443:2016,Englische bersetzung von DIN EN ISO 26443:2016-09Cramiques techniques valuation de ladhrence des revtements cramiques par lessai de pntration de Rockwell (ISO 26443:2008);Version anglaise EN ISO 26443

4、:2016,Traduction anglaise de DIN EN ISO 26443:2016-09SupersedesDIN CEN/TS 10718:200411www.beuth.deDocument comprises 15 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.09.16 DIN EN ISO 26443:2016-09 2 A comma is used as the dec

5、imal marker. National foreword The text of ISO 26443:2008 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” and has been taken over as EN ISO 26443 by Technical Committee CEN/TC 184 “Advanced technical ceramics” (Secretariat: DIN, Germany). The responsible German body involved in i

6、ts preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-01-64 AA Kohlenstoffschichten. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 6508-1 DIN EN ISO 6508-1 ISO 6508

7、-2 DIN EN ISO 6508-2 In addition to the legal units of measurement, this European Standard also uses the unit “kgf” (kilogram force). It should, however, be noted that the Gesetz ber Einheiten im Messwesen (German Law on units in metrology) prohibits the use of this unit for official and commercial

8、purposes in Germany. The German working committee points out the fact that the withdrawn German technical rule VDI 3198 classifies test results into 6 classes (HF 1 to HF 6), whereas the present standard only uses 4 classes (Class 0 to Class 3). The German working committee has come to the following

9、 interpretation of the English version of this standard: The following applies to the Scope: The standard can also be used for carbon coatings. Furthermore, the indent made by the indentor should be considered as being permanent, and an “elastic layer” is to be understood as a soft layer. In Clause

10、3 “Principle”, the damage near the indent is to be understood as being the damage caused by the indent. Clause 6 states that specimens for Rockwell indentation testing are to be plane parallel or levelled before indentation. For more information see DIN EN ISO 6508-1:2015-06, 7.5. Furthermore, this

11、clause gives, in parentheses, values in an obsolete unit that is not used any longer. “Thin substrates” means here thin specimens. The German working committee intends to introduce the relevant changes in the next revision of the International Standard. Amendments This standard differs from DIN CEN/

12、TS 1071-8:2004-11 as follows: a) the scope has been extended to coating thicknesses up to 20 m; b) normative references have been updated; c) editorial changes have been made and the standard has been brought in line with ISO rules of presentation. Previous editions DIN CEN/TS 1071-8: 2004-11 DIN EN

13、 ISO 26443:2016-09 3 National Annex NA (informative) Bibliography DIN EN ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test methods DIN EN ISO 6508-2, Metallic materials Rockwell hardness test Part 2: Verification and calibration of testing machines and indenters DIN EN ISO 26443:201

14、6-09 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 26443 April 2016 ICS 81.060.30 Supersedes CEN/TS 1071-8:2004English Version Fine ceramics (advanced ceramics, advanced technical ceramics) Rockwell indentation test for evaluation of adhesion of ceramic

15、coatings (ISO 26443:2008) Cramiques techniques valuation de ladhrence des revtements cramiques par lessai de pntration Rockwell (ISO 26443:2008) Hochleistungkerami Rockwell-Eindringprfung zur Bewertung der Haftung von keramischen Schichten (ISO 26443:2008) This European Standard was approved by CEN

16、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 national standards ma

17、y 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 language and notified

18、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, Hungary, Iceland

19、, 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-CENELEC Managemen

20、t 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 26443:2016 EEN ISO 26443:2016 (E) 2 Contents Page European foreword . 3 Foreword 4 1 Scope 5 2 Normative references 5 3 Principle

21、. 5 4 Apparatus . 5 5 Sampling and preparation of test specimens 6 6 Procedure. 6 7 Limits . 7 8 Test report . 8 (informative) Pictorial representations and sample photographs of the classes Annex Adefined in Table 1 . 9 Bibliography . 11 DIN EN ISO 26443:2016-09 EN ISO 26443:2016 (E) 3 European for

22、eword The text of ISO 26443:2008 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 26443:2016 by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is he

23、ld 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 standards shall be withdrawn at the latest by October 2016. Attention is drawn to the possibility

24、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 CEN/TS 1071-8:2004. According to the CEN-CENELEC Internal Regulations, the national standards organ

25、izations 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,

26、Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 26443:2008 has been approved by CEN as EN ISO 26443:2016 without any modification. DIN EN ISO 26443:2016-09 EN ISO 26443:2016 (E) 4

27、 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards 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

28、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 part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matter

29、s 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 prepare International Standards. Draft International Standards adopted by the technical committees are circulat

30、ed 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 that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible

31、 for identifying any or all such patent rights. ISO 26443 was prepared by Technical Committee ISO/TC 206, Fine ceramics. DIN EN ISO 26443:2016-09 EN ISO 26443:2016 (E) 5 1 Scope This International Standard specifies a method for the qualitative evaluation of the adhesion of ceramic coatingsN1)up to

32、20 m thick by indentation with a Rockwell diamond indenterN1). The formation of cracks after indentation may also reveal cohesive failure. The indentations are made with a Rockwell hardness test instrument. The method described in this International Standard may also be suitable for evaluating the a

33、dhesion of metallic coatings. The test is not suitable for elastic coatingsN1)on hard substrates. 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 references, the latest

34、 edition of the referenced document (including any amendments) applies. ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) ISO 6508-2, Metallic materials Rockwell hardness test Part 2: Verification and calibration of testing machines (s

35、cales A, B, C, D, E, F, G, H, K, N, T) 3 Principle An indentationN1)is made into the coated surface of the specimen to be tested, whereby the coating near the indent can be damagedN1). The indentation and surrounding area are examined for cracks and/or flaking with the aid of an optical microscope.

36、4 Apparatus The indentations shall be made in accordance with ISO 6508-1, following the procedure for a Rockwell hardness indentation. The Rockwell hardness testing machine shall conform with the requirements of ISO 6508-2. The contour of the diamond indenter shall be checked regularly by optical me

37、ans (magnifying glass, optical microscope, stereomicroscope or projection screen). This check shall be made for at least four different axial sections. The indenter shall be replaced if this examination reveals any damage to the indenter (e.g. chipping). A magnification of at least null200 is recomm

38、ended to detect ring cracks or microwear. Although a research project to evaluate the effect of indentation parameters showed no major influence of load rate or holding time on the results (see Reference 1), they should preferably be kept constant for reasons of repeatability. To conform with ISO 65

39、08-1, it is necessary to keep the loading time between 1 s and 8 s and the hold time at (4 null 2) s. Neither loading time nor holding time need to be recorded. N1)National footnote: See National foreword for remarks by the German working committee. DIN EN ISO 26443:2016-09 EN ISO 26443:2016 (E) 6 5

40、 Sampling and preparation of test specimens Select a representative test specimen from the coating to be tested. Clean the specimen so that it is free from dust and other particles, and also from oil or other surface films. 6 Procedure The indentation shall be made in a direction perpendicular to th

41、e specimen surface. Therefore specimens shall be prepared plane parallel and/or levelled before indentation.N1)Depending on the coating/substrate combination, a suitable load range shall be selected. The following rules shall apply: for metallic substrates harder than 54 HRC, a load of 1 471,5 N (15

42、0 kgf)N1)shall be used (Rockwell C scale); for metallic substrates softer than 54 HRC and for medium case-hardened steel substrates, a load of 981 N (100 kgf)N1)shall be used (Rockwell D scale); for all other substrates, e.g. shallow case-hardened steel, thin substratesN1), cemented carbides, solid

43、ceramics and cermets, a load of 588,6 N (60 kgf)N1)shall be used (Rockwell A scale). Using an optical microscope (magnification null100), relate the indentation to the classification given in Table 1. A pictorial representation and sample photographs of these classes can be found in Annex A. Table 1

44、 Classification of test results Class Observation Class 0 No cracking and no adhesive delamination Class 1 Cracking without adhesive delamination of the coating Class 2 Partial adhesive delamination, with or without cracking Class 3 Complete adhesive delamination Class 0 reveals acceptable adhesion.

45、 However, the absence of any visual failure can be due to the test not being suitable for the substrate/coating system under investigation. Class 1 shows no adhesive delamination; adhesion is acceptable. In the cases of class 2 and class 3, adhesion is unacceptable. The test may also reveal cohesive

46、 failure of the coating, e.g. cracking. The observation of cracks can be facilitated by using optical contrasting techniques, e.g. Nomarski interference contrast microscopy. N1)see Page 5 for National footnote. DIN EN ISO 26443:2016-09 EN ISO 26443:2016 (E) 7 Delamination can be due to adhesive as w

47、ell as cohesive failure of the coating: Adhesive delamination is defined as a removal of the coating, whereby the underlying substrate can be clearly seen, or a removal of one or more sublayers in a multilayer coating, whereby the substrate or an underlying sublayer can be clearly distinguished. Coh

48、esive delamination is defined as a partial removal of the coating, whereby the underlying substrate stays covered by the coating, or a removal of one or more sublayers in a multilayer coating, whereby the substrate and none of the underlying sublayers can be clearly distinguished. Complete delaminat

49、ion is defined as an uninterrupted removal of the coating along the circumference of the indent: When a class 2 failure is observed, an estimate of the percentage of delamination in relation to the surface area of the indent shall be given. This estimate shall be based on the sum of the calculated areas of each individual delamination, determined from its dimensions. A micrograph of a typical class 2 failure can be found in Annex A