SIST EN ISO 14604:2016

SLOVENSKI STANDARD
SIST EN ISO 14604:2016
01-junij-2016
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SIST EN 1071-9:2009
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Fine ceramics (advanced ceramics, advanced technical ceramics) - Methods of test for
ceramic coatings - Determination of fracture strain (ISO 14604:2012)
Hochleistungskeramik - Verfahren zur Prüfung keramischer Schichten - Bestimmung der
Bruchdehnung
Céramiques techniques - Méthodes d'essai des revêtements céramiques - Détermination
de la déformation à la rupture (ISO 14604:2012)
Ta slovenski standard je istoveten z: EN ISO 14604:2016
ICS:
25.220.99 Druge obdelave in prevleke Other treatments and
coatings
81.060.30 Sodobna keramika Advanced ceramics
SIST EN ISO 14604:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 14604:2016

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SIST EN ISO 14604:2016


EN ISO 14604
EUROPEAN STANDARD

NORME EUROPÉENNE

April 2016
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes EN 1071-9:2009
English Version

Fine ceramics (advanced ceramics, advanced technical
ceramics) - Methods of test for ceramic coatings -
Determination of fracture strain (ISO 14604:2012)
Céramiques techniques - Méthodes d'essai des Hochleistungskeramik - Verfahren zur Prüfung
revêtements céramiques - Détermination de la keramischer Schichten - Bestimmung der
déformation à la rupture (ISO 14604:2012) Bruchdehnung (ISO 14604:2012)
This European Standard was approved by CEN on 25 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 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 language 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14604:2016 E
worldwide for CEN national Members.

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SIST EN ISO 14604:2016
EN ISO 14604:2016 (E)
Contents Page
European foreword . 3
2

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SIST EN ISO 14604:2016
EN ISO 14604:2016 (E)
European foreword
The text of ISO 14604:2012 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 14604:2016
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 standards 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 1071-9:2009.
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,
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 14604:2012 has been approved by CEN as EN ISO 14604:2016 without any modification.
3

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SIST EN ISO 14604:2016

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SIST EN ISO 14604:2016
INTERNATIONAL ISO
STANDARD 14604
First edition
2012-12-01
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Methods of test for ceramic coatings —
Determination of fracture strain
Céramiques techniques — Méthodes d’essai des revêtements
céramiques — Détermination de la déformation à la rupture
Reference number
ISO 14604:2012(E)
©
ISO 2012

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SIST EN ISO 14604:2016
ISO 14604:2012(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

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SIST EN ISO 14604:2016
ISO 14604:2012(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Significance and use . 2
5 Principle . 2
6 Apparatus and materials. 2
6.1 Instrumentation . 2
6.2 Specimen preparation . 3
7 Test procedure . 4
7.1 Calibration . 4
7.2 Sample loading . 4
7.3 Strain determination . 4
7.4 Crack detection . 5
7.5 Test parameters . 6
8 Test report . 6
Bibliography .11
© ISO 2012 – All rights reserved iii

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SIST EN ISO 14604:2016
ISO 14604:2012(E)

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 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 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 prepare 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 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.
ISO 14604 was prepared by Technical Committee ISO/TC 206, Fine ceramics.
iv © ISO 2012 – All rights reserved

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SIST EN ISO 14604:2016
ISO 14604:2012(E)

Introduction
The fracture strain of a coating is a critical factor often determining the performance of a coated product.
Clearly, if stressed either directly or due to thermal effects (thermal expansion coefficient mismatch
between the coating and substrate) coating cracking can occur if the critical fracture stress/strain is
exceeded, and in many cases the effectiveness of the coating will be reduced. For example, corrosion-
resistant coatings loose their protective character if cracking occurs, and optical coatings become
ineffective when cracked. In many cases, cracking is the first stage of a much more serious form of
failure in which large areas of the coating can spall.
This International Standard describes a method for the determination of fracture strain using a technique
of applying stresses to a coupon of material by a uniaxial tensile or compressive test or a beam bending
test where the initiation of fracture in the coating is determined using an acoustic emission method.
The extent to which coated components can withstand external applied loads is an important property
in the application of any coated system, and usually the failure stress is required. For calculation of the
[1]
stress, both the fracture strain and Young’s modulus of the coating should be known. ISO 14577-4:2007
can be used to measure Young’s modulus by depth-sensing indentation, but there are other methods
involving flexure and impact excitation that may also be applied (References [2], [3]).
© ISO 2012 – All rights reserved v

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SIST EN ISO 14604:2016

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SIST EN ISO 14604:2016
INTERNATIONAL STANDARD ISO 14604:2012(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Methods of test for ceramic coatings —
Determination of fracture strain
1 Scope
This International Standard describes a method of measuring the fracture strain of ceramic coatings by
means of uniaxial tension or compression tests coupled with acoustic emission to monitor the onset of
cracking of the coating. Tensile or compressive strains can also be applied by flexure using four-point bending.
Measurements can be made in favourable cases at elevated temperatures as well as at room temperature.
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 edition of the referenced
document (including any amendments) applies.
EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature
EN 10002-5, Metallic materials — Tensile testing — Part 5: Method of test at elevated temperature
ISO 12106, Metallic materials — Fatigue testing — Axial-strain-controlled method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
fracture strain
strain required to create a detectable crack in the coating
NOTE The presence of the crack can be detected using optical or scanning electron microscopy, or indirectly
using acoustic emission
3.2
acoustic emission
AE
generation of acoustic signals
NOTE See Figure 1 for definition of AE signals. AE signals are recorded as hits, counts, energy or amplitude
(3.3, 3.4, 3.5 and 3.6).
3.3
AE hit
single acoustic event above a set threshold
3.4
AE energy
area of the waveform of an AE hit
3.5
AE amplitude
peak of the waveform of an AE hit
© ISO 2012 – All rights reserved 1

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SIST EN ISO 14604:2016
ISO 14604:2012(E)

3.6
AE threshold
arbitrary AE amplitude at which AE hits are deemed to be significant and above the AE signals generated
by the test equipment
3.7
AE counts
number of times the AE waveform passes a set threshold within a single hit
3.8
waveguide
metallic wire connecting (usually by spot welding) the sample to the AE transducer
4 Significance and use
This test procedure covers the measurement of fracture strain in tension or compression in coatings
subject to mechanical stress at ambient or elevated temperature.
The method is applicable to cases where the substrate is sufficiently ductile such that fracture of the
coating occurs before the substrate. In addition, if during plastic deformation of the substrate acoustic
signals are generated, this may interfere with those caused by coating fracture. Where possible, it
is recommended that a test be carried out with the uncoated substrate to determine whether such
extraneous AE signals occur.
5 Principle
Specimens of appropriate geometry are submitted to a mechanical stress; the subsequent strain is
measured and the
...