DIN EN ISO 13123-2012 Metallic and other inorganic coatings - Test method of cyclic heating for thermal-barrier coatings under temperature gradient (ISO 13123 2011) German version .pdf

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1、April 2012 Translation by DIN-Sprachendienst.English price group 11No 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

2、91.120.10!$6)“1881906www.din.deDDIN EN ISO 13123Metallic and other inorganic coatings Test method of cyclic heating for thermal-barrier coatings undertemperature gradient (ISO 13123:2011)English translation of DIN EN ISO 13123:2012-04Metallische und andere anorganische berzge Prfverfahren fr Wrmedmm

3、schichten unter Temperaturwechselbeanspruchung beigleichzeitigem Temperaturgradienten (ISO 13123:2011)Englische bersetzung von DIN EN ISO 13123:2012-04Revtements mtalliques et autres revtements inorganiques Mthode dessai de cyclage thermique de systmes barrire thermique sous gradient detemprature (I

4、SO 13123:2011)Traduction anglaise de DIN EN ISO 13123:2012-04www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.2003.12 DIN EN ISO 13123:2012-04 2 A comma is used as the decimal marker. National foreword This standard has been prepare

5、d by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings”, Working Group WG 1 “Thermal spraying”, in collaboration with Technical Committee CEN/TC 240 “Thermal spraying and thermally sprayed coatings” (Secretariat: DIN, Germany). The responsible German body involved in its preparat

6、ion was the Normenausschuss Schweien und verwandte Verfahren (Welding and allied processes Standards Committee), Joint Committee NA 092-00-14 AA Thermisches Spritzen und thermisch gespritzte Schichten (DVS AG V 7). The DIN Standards corresponding to the International Standards referred to in this do

7、cument are as follows: ISO 1463 DIN EN ISO 1463 ISO 2063 DIN EN ISO 2063 ISO 2178 DIN EN ISO 2178 ISO 14917 DIN EN 657 IEC 60584-1:1995 DIN EN 60584-1:1996-10 IEC 60584-2:1982 DIN EN 60584-2:1994-10 IEC 60584-3:2007 DIN EN 60584-3:2008-08 National Annex NA (informative) Bibliography DIN EN 657, Ther

8、mal spraying Terminology, classification DIN EN 60584-1:1996-10, Thermocouples Part 1: Reference tables DIN EN 60584-2:1994-10, Thermocouples Part 2: Tolerances DIN EN 60584-3:2008-08, Thermocouples Part 3: Extension and compensating cables Tolerances and identification system DIN EN ISO 1463, Metal

9、lic and oxide coatings Measurement of coating thickness Microscopical method DIN EN ISO 2063, Thermal spraying Metallic and other inorganic coatings Zinc, aluminium and their alloys DIN EN ISO 2178, Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magnetic method EUROPEA

10、N STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13123 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) Revtements mtalliques et autres revtements inorganiques -

11、 Mthode dessai de cyclage thermique de systmes barrire thermique sous gradient de temprature (ISO 13123:2011) Metallische und andere anorganische berzge - Prfverfahren fr Wrmedmmschichten unter Temperaturwechselbeanspruchung bei gleichzeitigem Temperaturgradienten (ISO 13123:2011) This European Stan

12、dard 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 concernin

13、g 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 it

14、s 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,

15、Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-

16、1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13123:2011: EContents DIN EN ISO 13123:2012-04 EN ISO 13123:2011 (E) 2 Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definition

17、s .5 4 Principle 6 5 Test piece .6 6 Test method 7 6.1 Test equipment 7 6.1.1 General 7 6.1.2 Test block .9 6.1.3 Heating unit 10 6.1.4 Cooling unit 10 6.1.5 Controller 10 6.1.6 Measuring instruments and sensor .10 6.1.7 Chamber .11 6.2 Testing 11 6.2.1 General 11 6.2.2 Procedure .11 6.3 Calculation

18、 12 6.4 Evaluation .13 6.4.1 General 13 6.4.2 Evaluating the thermal-barrier performance .13 6.4.3 Cyclic heat resistance .14 7 Test report 14 Annex A (informative) Calculation of temperature at the bottom side of the top coat 17 Foreword This document (EN ISO 13123:2011) has been prepared by Techni

19、cal 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 publicati

20、on 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

21、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, E

22、stonia, 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

23、CEN as a EN ISO 13123:2011 without any modification. “ DIN EN ISO 13123:2012-04 EN ISO 13123:2011 (E) 3 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, av

24、iation 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 met

25、hods 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. DIN EN ISO

26、13123:2012-04 EN ISO 13123:2011 (E) 4 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 bl

27、ades, 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 reference

28、s, 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 co

29、atings 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 6058

30、4-3:2007, 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 he

31、ating 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 DIN EN ISO 13123:2012-04 EN ISO 13123:2011 (E) 5 3.3 number of thermal c

32、ycles 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 sp

33、alling, 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

34、, 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

35、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

36、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 o

37、f 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

38、 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 sh

39、all 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

40、hole can be measured and described in the report, if necessary. DIN EN ISO 13123:2012-04 EN ISO 13123:2011 (E) 6 Dimensions in millimetres Key 1 top coat 2 bond coat 3 substrate 4 thermocouple hole dttop coat thickness (mm) Figure 1 Typical shape and dimensions of test piece 6 Test method 6.1 Test e

41、quipment 6.1.1 General The test equipment shall consist of a heating unit, cooling unit, test block, controller, and detector/measurement instruments. Figure 2 shows a typical test equipment arrangement. DIN EN ISO 13123:2012-04 EN ISO 13123:2011 (E) 7 Key 1 heat shield 8 pyrometer 2 heat flux meter

42、 9 camera 3 test-piece holder 10 shutter 4 heating unit 11 computer 5 test piece 12 AE sensor 6 cooling unit 13 control and detector unit7 coolant a) Test equipment with heat flux meter Key 1 heat shield 7 shutter 2 test piece 8 AE sensor 3 heating unit 9 coolant 4 cooling unit 10 computer 5 pyromet

43、er 11 control and detector unit6 camera b) Test equipment without heat flux meter Figure 2 Schematic diagram of test equipment DIN EN ISO 13123:2012-04 EN ISO 13123:2011 (E) 8 6.1.2 Test block 6.1.2.1 General The test block shall consist of a test piece, heat flux meter and test-piece holder. 6.1.2.

44、2 Heat flux meter Typical examples of a heat flux meter with a test piece are shown in Figure 3. The heat flux meter shall be brazed to the test piece as shown in Figure 3 a). A thermal-barrier coating may be directly coated on the top of a heat flux meter as shown in Figure 3 b), in order to avoid

45、the incomplete bonding or interdiffusion. The effect on the performance of the substrate thickness in the case of direct bonding should be considered and agreed upon between the parties involved. The outside diameter of the heat flux meter shall be the same as that of the test-piece substrate. The m

46、aterial of the heat flux meter should have a high thermal conductivity and a small temperature dependence, normally such as copper, nickel, etc. In order to determine the heat flux, multiple-thermocouple holes shall be provided, at regular intervals, running from the heat flux meters outer surface t

47、hrough to its central axis. The number of holes and the intervals separating them shall be chosen based on the material and dimensions of the heat flux meter, test conditions, etc. The heat flux meter need not be used when the test is intended only for evaluation of the cyclic heat resistance. Dimen

48、sions in millimetres a) Brazing method b) Direct coating method Key 1 test piece 2 thermocouple hole 3 brazing layer 4 heat flux meter dttop coat thickness (mm) Figure 3 Shape and dimensions of heat flux meter DIN EN ISO 13123:2012-04 EN ISO 13123:2011 (E) 9 6.1.2.3 Test-piece holder A typical example of a test-piece holder is shown in Figure 2. The test-piece holder is used to fix the test piece with the heat flux meter to the cooling unit. When the AE sensor is to be use