1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 13123:2011Metallic and other inorganiccoatings Test method ofcyclic heating for thermal-barrier coatings undertemperature gradient (ISO13123:2011)BS EN ISO 13123:2011 B
2、RITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO13123:2011.The UK participation in its preparation was entrusted to TechnicalCommittee STI/40, Thermally sprayed inorganic finishes.A list of organizations represented on this committee can beobtained on request
3、to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012ISBN 978 0 580 67283 5ICS 25.220.20Compliance with a British Standard cannot confer immunity fromlegal obli
4、gations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2012.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13123 December 2011 ICS 25.220.20 English Version Metallic an
5、d other inorganic coatings - Test method of cyclic heating for thermal-barrier coatings under temperature gradient (ISO 13123:2011) Revtements mtalliques et autres revtements inorganiques - Mthode dessai de cyclage thermique de systmes barrire thermique sous gradient de temprature (ISO 13123:2011) M
6、etallische und andere anorganische berzge - Prfverfahren fr Wrmedmmschichten unter Temperaturwechselbeanspruchung bei gleichzeitigem 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 Reg
7、ulations 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 mem
8、ber. 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.
9、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
10、, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN natio
11、nal Members. Ref. No. EN ISO 13123:2011: EBS EN ISO 13123:2011EN ISO 13123:2011 (E) 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 ther
12、mally 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 J
13、une 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 or
14、ganizations 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,
15、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. BS EN ISO 13123:2011ISO 13123:2011(E) ISO 2011 All rights reserved iiiContents Page Forewo
16、rd 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 .
17、 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
18、 the top coat 13 BS EN ISO 13123:2011ISO 13123:2011(E) iv ISO 2011 All rights reservedForeword 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 th
19、rough 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 collab
20、orates 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 Stan
21、dards. 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
22、 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. BS EN ISO 13123:2011ISO 13123:2011(E) ISO 2011 All rights reserved vIn
23、troduction 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 temperatur
24、es 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 condit
25、ion. 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. BS EN ISO 13123:2011BS EN ISO 13123:2011INTERNATIONAL STANDARD ISO 13123:2011(E) ISO 2011 All rights reserved 1Metall
26、ic 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 coating
27、s 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 docum
28、ent. 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 oth
29、er 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
30、 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
31、 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
32、coating BS EN ISO 13123:2011ISO 13123:2011(E) 2 ISO 2011 All rights reserved3.3 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 e
33、mit 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
34、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
35、-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 di
36、mensions 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
37、 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 ent
38、ire 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, runni
39、ng 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 shoul
40、d 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. BS EN ISO 13123:2011ISO 13123:2011(E) ISO 2011 All rights reserved 3Dimensions in millimetres Key 1 top coat 2 bond coat 3 substrate 4 th
41、ermocouple hole dttop coat thickness (mm) Figure 1 Typical shape and dimensions of test piece 6 Test method 6.1 Test equipment 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 e
42、quipment arrangement. BS EN ISO 13123:2011ISO 13123:2011(E) 4 ISO 2011 All rights reservedKey 1 heat shield 8 pyrometer 2 heat flux meter 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 equipmen
43、t 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 pyrometer 11 control and detector unit6 camera b) Test equipment without heat flux meter Figure 2 Schematic diagram of test equipment BS EN ISO 13123:2011ISO 13123:2011(E
44、) ISO 2011 All rights reserved 56.1.2 Test block 6.1.2.1 General The test block shall consist of a test piece, heat flux meter and test-piece holder. 6.1.2.2 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
45、 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 the incomplete bonding or interdiffusion. The effect on the performance of the substrate thickness in the case of direct bonding should be consi
46、dered 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 material of the heat flux meter should have a high thermal conductivity and a small temperature dependence, normally such as copper, nickel, etc.
47、 In order to determine the heat flux, multiple-thermocouple holes shall be provided, at regular intervals, running from the heat flux meters outer surface through to its central axis. The number of holes and the intervals separating them shall be chosen based on the material and dimensions of the he
48、at 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. Dimensions in millimetres a) Brazing method b) Direct coating method Key 1 test piece 2 thermocouple hole 3 brazing layer 4 heat flux meter dttop coa
49、t thickness (mm) Figure 3 Shape and dimensions of heat flux meter BS EN ISO 13123:2011ISO 13123:2011(E) 6 ISO 2011 All rights reserved6.1.2.3 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 used for detection of damage to the test piece, such a sensor shall be installed in the test-piece holder. The test piece may also be held by providing
