SIST EN ISO 13123:2012

Metallic and other inorganic coatings - Test method of cyclic heating for thermal-barrier coatings under temperature gradient (ISO 13123:2011)

ISO 13123:2011 applies to the test method of cyclic heating to evaluate the thermal-barrier performance and cyclic heat resistance of the thermal-barrier coatings provided for high-temperature components, such as burners, rotor and stator blades, etc. of power-generation gas turbines used in thermal power plants, aircraft engines and rocket engines.

Metallische und andere anorganische Überzüge - Prüfverfahren für Wärmedämmschichten unter Temperaturwechselbeanspruchung bei gleichzeitiger Temperaturerhöhung (ISO 13123:2011)

Diese Internationale Norm gilt für die Prüfmethode mit zyklischer Erwärmung, um das Wärmedämmvermögen und die zyklische Wärmebeständigkeit von Wärmedämmschichten zu bewerten, die verwendet werden für Hochtemperaturkomponenten, wie Brenner, Rotor- und Gehäuseschaufeln, usw. von Energie erzeugenden Gasturbinen, die in Wärmekraftwerken, Strahltriebwerken und Raketenmotoren eingesetzt werden.

Revêtements métalliques et autres revêtements inorganiques - Méthode d'essai de cyclage thermique de systèmes barrière thermique sous gradient de température (ISO 13123:2011)

L'ISO 13123:2011 spécifie la méthode d'essai de cyclage thermique permettant d'évaluer les performances et la résistance au cyclage thermique des systèmes barrière thermique revêtant des composants soumis à des températures élevées, tels que les chambres de combustion, les aubes de rotor et de stator et autres éléments des turbines à gaz utilisées pour la production d'énergie dans les centrales thermiques, les moteurs d'avion et les moteurs de fusée.

Kovinske in druge anorganske prevleke - Preskusne metode za ciklično segrevanje termičnih prevlek pri dvigovanju temperature (ISO 13123:2011)

Ta mednarodni standard se uporablja za preskusno metodo cikličnega segrevanja, da se ovrednoti termična zmogljivost in odpornost na ciklično segrevanje termičnih prevlek, ki se uporabljajo za sestavne dele z visoko temperaturo, kot so gorilniki, rotorske in statorske lopatice itd., plinskih turbin za proizvodnjo energije v termoelektrarnah, letalskih in raketnih motorjih.

General Information

• Status: Published
• Publication Date: 24-Jan-2012
• ICS: 25.220.20 - Surface treatment
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Jan-2012
• Due Date: 16-Mar-2012
• Completion Date: 25-Jan-2012
• Ref Project: EN ISO 13123:2011 - Metallic and other inorganic coatings - Test method of cyclic heating for thermal-barrier coatings under temperature gradient (ISO 13123:2011)

Overview

EN ISO 13123:2011 (ISO 13123:2011) specifies a laboratory test method of cyclic heating for thermal-barrier coatings (TBCs) under a temperature gradient. It is intended to evaluate thermal-barrier performance and cyclic heat resistance of refractory inorganic coatings applied to high‑temperature components (for example burners, rotor and stator blades) used in power‑generation gas turbines, aircraft engines and rocket engines.

Key topics and technical requirements

• Scope and purpose: standardized cyclic‑heating testing under a temperature gradient to assess insulation performance and damage behaviour (spalling, cracking) of TBC systems.
• Test piece geometry: typical disk specimens with diameter 15–30 mm; substrate thickness measured per ISO 1463 / ISO 2178; top‑coat thickness uniformity within ±10%. Provision for a thermocouple hole to measure central substrate temperature.
• Test equipment components:
  • Heating unit and cooling unit to impose a controlled temperature gradient.
  • Test block (test piece, test‑piece holder, heat flux meter - brazed or coated), pyrometer, shutter and heat shield.
  • Measurement and control: thermocouples, pyrometer, heat‑flux meter, acoustic emission (AE) sensor, camera and recorder/controller.
• Measured outputs:
  • Change in equivalent effective thermal conductivity (to evaluate thermal‑barrier performance).
  • Acoustic emission occurrence frequency and visual inspection for spalling/cracking to evaluate cyclic heat resistance and determine number of cycles to damage tolerance.
  • Spalling area ratio: ratio of total spalled area to coated area.
• Test procedure & reporting: describes setup, cyclic procedure, calculations (including temperature at bottom of top coat - Annex A), evaluation criteria and required test report contents.
• Normative references include ISO 1463, ISO 2063, ISO 2178, ISO 14917 and IEC thermocouple standards.

Applications and practical value

• Quality control and acceptance testing of TBCs used in gas turbines, aero engines and rocket combustors.
• Comparative evaluation of coating materials, bond‑coats and application processes (e.g., thermal‑sprayed TBCs).
• R&D and lifetime assessment: estimating degradation modes under realistic temperature gradients and cyclic loading.
• Supporting procurement specifications and supplier qualification for turbine component coatings.

Who uses this standard

• Coating manufacturers and thermal‑spray service providers
• Turbine, aero engine and rocket engine OEMs
• Materials and coatings test laboratories
• R&D teams in aerospace and power generation
• Quality assurance and certification bodies

Related standards

• ISO 1463 (coating thickness – microscopical)
• ISO 2063, ISO 14917 (thermal spraying terminology/processes)
• ISO 2178 (non‑magnetic coatings thickness measurement)
• IEC 60584 series (thermocouples)

Keywords: ISO 13123, EN ISO 13123, thermal‑barrier coatings, TBC cyclic heating test, temperature gradient, cyclic heat resistance, heat flux meter, acoustic emission, gas turbine coatings.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2012
.RYLQVNHLQGUXJHDQRUJDQVNHSUHYOHNH3UHVNXVQHPHWRGH]DFLNOLþQR
VHJUHYDQMHWHUPLþQLKSUHYOHNSULGYLJRYDQMXWHPSHUDWXUH,62
Metallic and other inorganic coatings - Test method of cyclic heating for thermal-barrier
coatings under temperature gradient (ISO 13123:2011)
Metallische und andere anorganische Überzüge - Prüfverfahren für
Wärmedämmschichten unter Temperaturwechselbeanspruchung bei gleichzeitiger
Temperaturerhöhung (ISO 13123:2011)
Revêtements métalliques et autres revêtements inorganiques - Méthode d'essai de
cyclage thermique de systèmes barrière thermique sous gradient de température (ISO
13123:2011)
Ta slovenski standard je istoveten z: EN ISO 13123:2011
ICS:
25.220.20 Površinska obdelava Surface treatment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 13123
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2011
ICS 25.220.20
English Version
Metallic and other inorganic coatings - Test method of cyclic
heating for thermal-barrier coatings under temperature gradient
(ISO 13123:2011)
Revêtements métalliques et autres revêtements Metallische und andere anorganische Überzüge -
inorganiques - Méthode d'essai de cyclage thermique de Prüfverfahren für Wärmedämmschichten unter
systèmes barrière thermique sous gradient de température Temperaturwechselbeanspruchung bei gleichzeitigem
(ISO 13123:2011) Temperaturgradienten (ISO 13123:2011)
This European Standard was approved by CEN on 14 December 2011.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13123:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 13123:2011) has been prepared by Technical Committee ISO/TC 107 "Metallic and
other inorganic coatings" in collaboration with Technical Committee CEN/TC 240 “Thermal spraying and
thermally sprayed coatings” 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 June 2012, and conflicting national standards shall be withdrawn at
the latest by June 2012.
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.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 13123:2011 has been approved by CEN as a EN ISO 13123:2011 without any modification.

INTERNATIONAL ISO
STANDARD 13123
First edition
2011-12-15
Metallic and other inorganic coatings —
Test method of cyclic heating for
thermal-barrier coatings under
temperature gradient
Revêtements métalliques et autres revêtements inorganiques —
Méthode d'essai de cyclage thermique de systèmes barrière thermique
sous gradient de température
Reference number
ISO 13123:2011(E)
©
ISO 2011
ISO 13123:2011(E)
©  ISO 2011
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 [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

ISO 13123:2011(E)
Contents Page
Foreword . iv
Introduction . v
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Principle . 2
5  Test piece . 2
6  Test method . 3
6.1  Test equipment . 3
6.1.1  General . 3
6.1.2  Test block . 5
6.1.3  Heating unit . 6
6.1.4  Cooling unit . 6
6.1.5  Controller . 6
6.1.6  Measuring instruments and sensor . 6
6.1.7  Chamber . 7
6.2  Testing . 7
6.2.1  General . 7
6.2.2  Procedure . 7
6.3  Calculation . 8
6.4  Evaluation . 9
6.4.1  General . 9
6.4.2  Evaluating the thermal-barrier performance . 9
6.4.3  Cyclic heat resistance . 10
7  Test report . 10
Annex A (informative) Calculation of temperature at the bottom side of the top coat . 13

ISO 13123:2011(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 13123 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings.
iv © ISO 2011 – All rights reserved

ISO 13123:2011(E)
Introduction
Thermal-barrier coatings (TBCs) are refractory coatings which provide thermal insulation for turbine blades
and vanes, as well as for combustion chamber liners in power generation, aviation gas turbines and rocket
combustors. They allow operation at substantially higher surface temperatures than is possible with bare
metal, and thus TBCs have been used to extend the life of components that suffer from severe heat load
cyclically during operation.
Conventional isothermal test methods are not suitable for evaluating the TBC under high heat load with a
large temperature-gradient condition. Standardization of a cyclic heating test method for determination of their
thermal-barrier performance and cyclic heat resistance under a temperature gradient field is required.

INTERNATIONAL STANDARD ISO 13123:2011(E)

Metallic and other inorganic coatings — Test method of cyclic
heating for thermal-barrier coatings under temperature gradient
1 Scope
This International Standard applies to the test method of cyclic heating to evaluate the thermal-barrier
performance and cyclic heat resistance of the thermal-barrier coatings provided for high-temperature
components, such as burners, rotor and stator blades, etc. of power-generation gas turbines used in thermal
power plants, aircraft engines and rocket engines.
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.
ISO 1463, Metallic and oxide coatings — Measurement of coating thickness — Microscopical method
ISO 2063, Thermal spraying — Metallic and other inorganic coatings — Zinc, aluminium and their alloys
ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic
method
ISO 14917, Thermal spraying — Terminology, classification
ISO 80000-1, Qualities and units — Part 1: General
IEC 60584-1:1995, Thermocouples — Part 1: Reference tables
IEC 60584-2:1982, Thermocouples — Part 2: Tolerances
IEC 60584-3:2007, Thermocouples — Part 3: Extension and compensating cables —Tolerances and
identification system
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2063, ISO 14917 and the following
apply.
3.1
temperature gradient
temperature gradient caused by heating and cooling of both material surfaces of a test piece with
thermal-barrier coatings
3.2
cyclic-heating testing
testing in which a temperature gradient is applied cyclically to the test piece with a thermal-barrier coating
ISO 13123:2011(E)
3.3
number of thermal cycles
number of times the cyclic heating test is applied to the test piece with thermal-barrier coatings
3.4
acoustic emission
AE
phenomenon of a test piece provided with a thermal-barrier coating to emit an elastic wave by releasing the
energy previously accumulated during damage generation like spalling, cracking, etc.
3.5
spalling area ratio
ratio of the total spalling area of a thermal-barrier coating to the effective area to which the thermal-barrier
coating has been applied
4 Principle
The test piece provided with a thermal-barrier coating is subject cyclically to the cyclic heating test, in which
the variation in equivalent effective thermal conductivity or acoustic emission occurrence frequency is
measured, for the purpose of evaluating the thermal-barrier performance of the thermal-barrier coatings.
The test is also used to evaluate the cyclic heat resistance of thermal-barrier coatings by visually observing
spalling and cracking in the test piece, and by determining the number of heating cycles needed to reach the
damage tolerance limit.
5 Test piece
The typical shape and dimensions of the test piece are shown in Figure 1.
The shape and dimensions of a typical test piece shall be a disk having a diameter of 15 mm to 30 mm.
The effect of substrate thickness on the performance should be determined based on the agreement between
the parties involved prior to the test. Its thickness should be measured according to ISO 1463 and ISO 2178.
It is recommended that the edge of the heating side of the substrate be rounded to a curvature of about
0,5 mm to 2 mm, or chamfered, in order to prevent cracking at the test-piece edge.
The thermal-barrier coating shall cover the entire heating surface of the substrate. The coating thickness shall
be measured at multiple points in the middle and peripheral portions and shall be within 10 % of the average
value.
To measure the temperature in the central portion of the substrate, a hole may be provided for the
thermocouple, running from the side of the substrate to the central portion (see 6.1.2.2). The position of the
hole shall be such that no adverse effect is exerted on the stress field occurring in the coating layer and on the
temperature measurement accuracy. The maximum diameter of the hole for the thermocouple should be close
to the outside diameter of the thermocouple isolation. The position and diameter of the hole can be measured
and described in the report, if necessary.
2 ©
...