BS ISO 14610-2012 Fine ceramics (advanced ceramics advanced technical ceramics) Test method for flexural strength of porous ceramics at room temperature《精细陶瓷(高级陶瓷 高级技术陶瓷) 室温下多孔陶瓷的绕.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 14610:2012Fine ceramics (advancedceramics, advanced technicalceramics) Test method forflexural strength of porousceramics at room temperatureBS ISO 14610:2012 BRITISH STAN

2、DARDNational forewordThis British Standard is the UK implementation of ISO 14610:2012. The UK participation in its preparation was entrusted to T e c h n i c a l Committee RPI/13, Advanced technical ceramics.A list of organizations represented on this committee can be obtained on request to its secr

3、etary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 69622 0 ICS 81.060.30 Compliance with a British Standard canno

4、t confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 14610:2012 ISO 2012Fine ceramics (advanced ceramics, advanced tec

5、hnical ceramics) Test method for flexural strength of porous ceramics at room temperatureCramiques techniques Mthode dessai de la rsistance en flexion des cramiques poreuses temprature ambianteINTERNATIONAL STANDARDISO14610First edition2012-08-01Reference numberISO 14610:2012(E)BS ISO 14610:2012ISO

6、14610:2012(E)ii ISO 2012 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All 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

7、in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 14610:2012ISO 14610:2012(E) ISO 201

8、2 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Apparatus . 24.1 Test apparatus . 24.2 Four-point flexure fixture 24.3 Micrometer calliper 34.4 Dial gauge 34.5 Vernier calliper . 35 Test piece 35.1 Test piece size 35.2 Test piece prepa

9、ration 35.3 Number of test pieces . 36 Testing method . 46.1 Measurement of width and thickness of test piece . 46.2 Distance between internal support points (internal span) and distance between external support points (external span) . 46.3 Crosshead displacement speed and rupture force . 46.4 Forc

10、e-displacement curve . 47 Calculation 47.1 Calculation of the flexural strength . 47.2 Calculation of mean value and standard deviation 58 Test report . 5BS ISO 14610:2012ISO 14610:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards

11、 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 organiza

12、tions, 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 th

13、e 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 t

14、he 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 14610 was prepared by Technical Committee ISO/TC 206, Fine ceramic

15、s.iv ISO 2012 All rights reservedBS ISO 14610:2012INTERNATIONAL STANDARD ISO 14610:2012(E)Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for flexural strength of porous ceramics at room temperature1 ScopeThis International Standard describes a test method for determining

16、the flexural strength of porous fine ceramics in air at room temperature.2 Normative referencesThe 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

17、 document (including any amendments) applies.ISO 463:2006, Geometrical Product Specifications (GPS) Dimensional measuring equipment Design and metrological characteristics of mechanical dial gauges.ISO 1101:2012, Geometrical Product Specifications (GPS) Geometrical tolerancing Tolerances of form, or

18、ientation, location and run-outISO 3611:2010, Geometrical product specifications (GPS) Dimensional measuring equipment: Micrometers for external measurements Design and metrological characteristicsISO 13385-1:2011, Geometrical product specifications (GPS) Dimensional measuring equipment Part 1: Call

19、ipers; Design and metrological characteristicsISO 13385-2:2011, Geometrical product specifications (GPS) Dimensional measuring equipment Part 2: Calliper depth gauges; Design and metrological characteristicsISO 4287:1997, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms

20、, definitions and surface texture parametersISO 14704, Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for flexural strength of monolithic ceramics at room temperatureISO 20507:2003, Fine ceramics (advanced ceramics, advanced technical ceramics) VocabularyISO 80000-1:2009,

21、 Quantities and units Part 1: General.3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 20507 and the following apply.3.1porous fine ceramicsceramics with a porosity of 30 % to 60 % and a pore diameter of 0,05 m to 100 m, for applications such as filter

22、s, catalyst carriers, humidity sensors, or molecular sieves, excluding structured honeycomb cellular channels3.2four-point flexural strengthmaximum value of the stress generated in flexure in a test piece up to rupture when the test piece is supported at two support points near its ends and loaded s

23、ymmetrically at two loading points between them ISO 2012 All rights reserved 1BS ISO 14610:2012ISO 14610:2012(E)3.3four-point flexure fixturea fixture design to provide defined four-point flexural loading to a test piece, as described in ISO 147044 Apparatus4.1 Test apparatusThe test apparatus shall

24、 be able to maintain a constant crosshead displacement speed and shall be able to measure the force with an accuracy of 1 % of the maximum force.4.2 Four-point flexure fixtureThe four-point flexure fixture of similar construction to that shown in ISO 14704 shall be used (see Figure 1). The use of a

25、semi- or fully-articulating fixture is required in order to prevent torsional deformation. The test piece is supported near its ends on a pair of freely moving bearings of equal size and of length greater than the test piece, and is loaded by a similar pair of bearings symmetrically positioned with

26、respect to the support bearings. The material of the bearings shall be at least 140 GPa in elastic modulus, and free from plastic deformation and being broken midway through testing. The radius of curvature at the tip of the bearings shall be 2,0 mm to 3,0 mm, and their surface roughness shall be at

27、 most 0,40 mRa measured in accordance with ISO 4287.NOTE The test piece and/or its bearings may move during the test. Precautions should be taken, where possible, to minimize such movement without restricting the flexural displacement, for example, by providing support rollers with restraint against

28、 a stop in the correct position, and by placing a vertical stop against the ends of the test piece.L/2 L/2l/2 l/2Ddb123Dimensions in millimetresKey1 Specimen2 Inner support3 Outer supportD roller diameter (D = 4 mm to 6 mm)L outer span (L = 60 mm 0,5 mm)l inner span (l = 30 mm 0.5 mm)Figure 1 Four-p

29、oint flexure fixture2 ISO 2012 All rights reservedBS ISO 14610:2012ISO 14610:2012(E)4.3 Micrometer calliperMicrometer callipers for external measurement having the same accuracy as specified in ISO 3611, or better, shall be used.4.4 Dial gaugeDial gauges having the same accuracy of minimum reading o

30、f 0,01 mm as specified in ISO 463, or better, shall be used.4.5 Vernier calliperVernier callipers having the same accuracy of minimum reading of 0,05 mm as specified in ISO 13385, or better, shall be used.5 Test piece5.1 Test piece sizeThe shape of a test piece shall be a beam of uniform rectangular

31、 cross-section. Its standard dimensions shall be 70 mm 0,5 mm in total length, 8,0 mm 0,1 mm in width, and 6,0 mm 0,1 mm in thickness. The parallelism between the upper and lower surfaces of the test piece shall be better than 0,02 mm as specified in ISO 1101. The longer edges shall be rounded or ch

32、amfered by an amount of 0,1 mm to 0,3 mm as given in Figure 2. This chamfering shall be carried out with caution so as not to introduce defects resulting in a fracture-initiation site. The chamfering is not necessary when the grain size of material is larger than 0,1 mm.LTdbcc45KeyLTlength of test p

33、iece ( LT= 70 mm 0,5 mm)bwidth of test piece ( b = 8,0 mm 0,1 mm)dthickness of test piece ( d = 6,0 mm 0,1 mm)cchamfer or rounding (c = 0,1 mm to 0,3 mm)Figure 2 Test piece dimensions and chamfering of long edges5.2 Test piece preparationThe surface shall be finished by grinding with a wheel whose g

34、rain size is 20 m or smaller. The contamination by wax, if any, should be removed by organic solution or by heating at 773 K (500C) for 1 h to evaporate wax.5.3 Number of test piecesThe number of test pieces shall be at least 10. ISO 2012 All rights reserved 3BS ISO 14610:2012ISO 14610:2012(E)6 Test

35、ing method6.1 Measurement of width and thickness of test pieceThe width and thickness of test pieces shall be measured to an accuracy of 0,01 mm by means of the micrometer callipers as specified in 4.3 or a measuring instrument having an equivalent accuracy or better. If, for any reason, different t

36、est piece dimensions have to be used, they shall be stated in the test report.6.2 Distance between internal support points (internal span) and distance between external support points (external span)These distances are respectively indicated by l and L in Figure 1, which shall be measured with a cal

37、liper.NOTE Alternatively, this distance can be measured using a calibrated travelling microscope.6.3 Crosshead displacement speed and rupture forceThe test piece shall be centrally positioned in the test fixture. The force shall be applied to the test piece with the crosshead speed being 0,5 mm/min,

38、 and the maximum force up to rupture of the test piece shall be recorded.6.4 Force-displacement curveThe relationship between the crosshead displacement and force shall be measured during a period from the test start-up to failure of the test piece.7 Calculation7.1 Calculation of the flexural streng

39、thThe four-point flexural strength shall be calculated from the measurements of individuals using Formula (1), and the calculated values shall be rounded to three significant figures according to ISO 80000-1.fPL lbd=322()(1)wherefis the four-point flexural strength, in megapascals (MPa)Pis the maxim

40、um load up to rupture of the test piece, in newtons (N)lis the distance between internal support points, in millimetres (mm)Lis the distance between external support points, in millimetres (mm)bis the width of the test piece, in millimetres (mm)dis the thickness of the test piece, in millimetres (mm

41、)4 ISO 2012 All rights reservedBS ISO 14610:2012ISO 14610:2012(E)7.2 Calculation of mean value and standard deviationThe mean value and the standard deviation for four-point flexural strength shall be calculated using Formulae (2) and (3) below, and the calculated values shall be rounded to three si

42、gnificant figures according to ISO 80000-1.xxniin=1(2)Sxxniin=()211(3)wherexiis the calculated value of flexural strength of an individual test piece, in megapascals (MPa)xis the mean value of flexural strength, in megapascals (MPa)Sis the standard deviation of flexural strength, in megapascals (MPa

43、)nis the number of test pieces8 Test reportThe test report shall include the following information:a) Name and class of materialb) Dimensions (mean values) of test piecec) Name of testing machine and its typed) Test conditions (capacity of testing machine, load cell, crosshead speed, temperature, hu

44、midity)e) Number of test piecesf) Flexural strength for each test piece testedg) Mean and standard deviation of flexural strengthh) Force-displacement curve (typical example) ISO 2012 All rights reserved 5BS ISO 14610:2012ISO 14610:2012(E) ISO 2012 All rights reservedICS 81.060.30Price based on 5 pa

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