1、BSI Standards PublicationBS ISO 17170:2015Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for spherical indentation ofporous ceramicsBS ISO 17170:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 17170:2015.The UK participation in
2、its preparation was entrusted to TechnicalCommittee RPI/13, Advanced technical ceramics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for i
3、ts correctapplication. The British Standards Institution 2015.ublished by BSI Standards Limited 2015ISBN 978 0 580 76490 5ICS 81.060.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and St
4、rategy Committee on 31 December 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 17170:2015 ISO 2015Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for spherical indentation of porous ceramicsCramiques techniques Mthode dessai dindentat
5、ion des cramiques poreuses avec un indenteur sphriqueINTERNATIONAL STANDARDISO17170First edition2015-12-15Reference numberISO 17170:2015(E)BS ISO 17170:2015ISO 17170:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless other
6、wise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address b
7、elow or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 17170:2015ISO 17170:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and d
8、efinitions . 14 Test specimens 24.1 Specimen size . 24.2 Specimen preparation 24.3 Number of specimens . 25 Testing machine and equipment 25.1 Testing machine . 25.2 Spherical indenter 35.3 Pedestal . 35.4 Micrometer calipers . 35.5 Dial gauges 35.6 Humidity measuring device . 36 Testing method . 36
9、.1 Measurement of specimen dimension 36.2 Specimen positioning and loading method 36.3 Crosshead speed 46.4 Measurement of load and load-point displacement . 46.5 Reuse of pedestal 56.6 Measurement of temperature and humidity . 56.7 Reuse of spherical indenter . 56.8 Number of tests 57 Treatment of
10、test result. 57.1 Load vs. load-point displacement curve . 57.2 Strength of spherical indentation . 57.3 Calculation of mean value and standard variation 68 Test report . 68.1 Items to be reported . 68.2 Items preferred to be reported . 6 ISO 2015 All rights reserved iiiContents PageBS ISO 17170:201
11、5ISO 17170:2015(E)ForewordISO (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 subj
12、ect 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 (IE
13、C) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be n
14、oted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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 identifyin
15、g any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience o
16、f users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supple
17、mentary informationThe committee responsible for this document is ISO/TC 206, Fine ceramics.iv ISO 2015 All rights reservedBS ISO 17170:2015INTERNATIONAL STANDARD ISO 17170:2015(E)Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for spherical indentation of porous ceramics1
18、 ScopeThis International Standard describes the test methods for determining spherical indentation strength of porous ceramics, such as those employed for filters and catalyst carriers, that are carried out in air at room temperature.2 Normative referencesThe following documents, in whole or in part
19、, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 463, Geometrical Product Specifications (GPS) Di
20、mensional measuring equipment Design and metrological characteristics of mechanical dial gaugesISO 683-1, Heat-treatable steels, alloy steels and free-cutting steels Part 1: Non-alloy steels for quenching and temperingISO 683-3, Heat-treatable steels, alloy steels and free-cutting steels Part 3: Cas
21、e-hardening steelsISO 1101, Geometrical product specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-outISO 3290-1, Rolling bearings Balls Part 1: Steel ballsISO 3611, Geometrical product specifications (GPS) Dimensional measuring equipment: Micrometers for
22、external measurements Design and metrological characteristicsISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parametersISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression
23、 testing machines Verification and calibration of the force-measuring system3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1porous ceramicsceramics with porosity of 30 % to 60 %, and pore diameter of 1 m to 100 m, for applications such as filter
24、s, catalyst carriers, humidity sensors, or molecular sieves, excluding structured honeycomb cellular channels3.2spherical indentersphere through which a compressive load is applied to the specimen ISO 2015 All rights reserved 1BS ISO 17170:2015ISO 17170:2015(E)3.3fracture by spherical indentationfra
25、cture is the separation of a specimen into more than two pieces, or many small flakes or powder-like pieces, accompanied by a large drop or disappearance of force3.4strength by spherical indentationmaximum load measured in the period from start of test to the fracture of the test specimen when the c
26、ompressive load is applied to the specimen through the spherical indenter4 Test specimens4.1 Specimen sizeThe shape of a test specimen shall be a flat plate with a regular square cross section. Its standard dimensions shall be 20,0 mm 0,1 mm in horizontal length, 20,0 mm 0,1 mm in vertical length, a
27、nd 10,0 mm 0,1 mm in thickness. The parallelism between the upper and lower surfaces of the specimen shall be at most 0,01 mm specified in ISO 1101. When the dimensions are different from the standard one, they shall be stated in a report.dKeyd vertical length (d = 20,0 mm 0,1 mm)w horizontal length
28、 (w = 20,0 mm 0,1 mm)t thickness (t = 10,0 mm 0,1 mm)Figure 1 Specimen dimensions4.2 Specimen preparationThe specimen surface shall be finished by grinding with a wheel whose grain number is at least 800. Contamination by fixatives (e.g. wax) or grinding fluids employed during grinding processes, if
29、 any, should be removed by organic dissolution, or by heating at a sufficiently high temperature.4.3 Number of specimensThe number of specimens shall be at least 10.5 Testing machine and equipment5.1 Testing machineA testing machine shall be so constructed that compressive stress can be applied to a
30、 test specimen at a constant crosshead speed. The testing machine shall be equipped with an apparatus measuring 2 ISO 2015 All rights reservedBS ISO 17170:2015ISO 17170:2015(E)or indicating the load with an accuracy of at most 1 % of the maximum load in accordance with ISO 7500-1 or have better prec
31、ision.5.2 Spherical indenterA steel sphere with 3/4 inch (19,05 mm) or 19 mm diameter specified in ISO 3290-1 shall be used as an indenter.5.3 PedestalA pedestal placed below the specimen shall be made of carbon steel for mechanical use with a carbon content of 0,4 % to 0,6 % defined by in ISO 683-1
32、 and ISO 683-3 or materials with the hardness over 150 Hv. The thickness of the pedestal shall be at least 10 mm, and the surface area of the pedestal contacting with the specimen is at least four times of the specimen cross-section area. The surface of the pedestal contacting the specimen shall be
33、at most Ra = 0,40 m determined in accordance with ISO 4287, and the parallelism shall be at most 0,01 mm specified in ISO 1101.5.4 Micrometer calipersMicrometer calipers shall be those for external measurement in accordance with ISO 3611 or have better precision.5.5 Dial gaugesDial gauges shall be t
34、hose with a scale of 0,01 mm in accordance with ISO 463 or have a better precision.5.6 Humidity measuring deviceHumidity measuring device shall be equipped with a performance measuring or indicating the humidity with an accuracy of at most 5 % RH.6 Testing method6.1 Measurement of specimen dimension
35、The horizontal and vertical lengths and thickness of the specimen shall be measured to a precision of 0,01 mm by using micrometer calipers for external measurement or a measuring instrument at least equal in precision thereto.6.2 Specimen positioning and loading methodThe specimen is positioned at t
36、he centre of the pedestal. The central axis of the pedestal, specimen and spherical indenter are aligned along the load line. The specimen shall be loaded by forcing the spherical indenter into the test specimen. Figure 2 illustrates a testing setup. ISO 2015 All rights reserved 3BS ISO 17170:2015IS
37、O 17170:2015(E)7654321Key1 loading jig2 scattering prevention cover3 spherical folder4 spherical indenter5 test specimen6 pedestal7 base of testing machineFigure 2 Testing setup for small spherical indentation6.3 Crosshead speedThe crosshead speed shall be 0,5 mm/min.6.4 Measurement of load and load
38、-point displacementLoad and load-point displacement shall be measured from the start of the test to the specimen fracture. The load point displacement shall be measured with a displacement meter such as an electronic dial gauge or transducer, as shown in Figure 3, or from the crosshead displacement
39、of testing machine.4 ISO 2015 All rights reservedBS ISO 17170:2015ISO 17170:2015(E)123Key1 dial gauge2 support of dial gauge3 contact plate for load point displacementFigure 3 Measurement of load-point displacement6.5 Reuse of pedestalWhen the pedestal is reused, dimples or flaws shall be completely
40、 removed.6.6 Measurement of temperature and humidityWhen indentation tests are carried out, the temperature and humidity of the test environment shall be measured.6.7 Reuse of spherical indenterIf a spherical indenter is to be reused, inspect it for damage. If dimples or flaws have been generated by
41、 prior use, an unused region of the sphere shall be used as the contact area with the test specimen.6.8 Number of testsThe minimum number of successful tests shall be 10. Test specimens shall be used only for a single test.7 Treatment of test result7.1 Load vs. load-point displacement curveA load vs
42、. load-point displacement curve shall be drawn from the start of the test to the fracture of the test specimen.7.2 Strength of spherical indentationThe maximum load which is determined from load vs. load-point displacement curve shall be the strength of spherical indentation. Also, the load-point di
43、splacement at the maximum load shall be recorded. ISO 2015 All rights reserved 5BS ISO 17170:2015ISO 17170:2015(E)7.3 Calculation of mean value and standard variationThe mean value and the standard deviation of the fracture strength by spherical indentation shall be calculated using Formulae (1) and
44、 (2), and rounded to three significant figures:xxniin=1(1)Sxxniin=()=211(2)wherexiindentation fracture strength of each specimen (N);xmean of indentation fracture strength (N);S standard deviation of indentation fracture strength (N);n number of specimens.8 Test report8.1 Items to be reportedThe tes
45、t report shall include following items:a) the name and class of material;b) the dimensions (mean value) of the specimen;c) the material and diameter of the spherical indenter;d) the name of testing machine and its type;e) the material and dimension of pedestal;f) the loading condition (crosshead spe
46、ed);g) the conditions of temperature and humidity at test;h) the number of specimens tested;i) the list of test results (indentation fracture strength and its load point displacement);j) the mean and standard variation of indentation fracture strength;k) the load vs. load-point displacement curves;l
47、) a reference to this International Standard, i.e. ISO 17170.8.2 Items preferred to be reportedWhere appropriate, the following items may supplement the test report:a) the manufacturers name of material and its date of manufacture;b) the name of material, kinds of additive, and sintering method;c) t
48、he porosity and mean pore size of material;6 ISO 2015 All rights reservedBS ISO 17170:2015ISO 17170:2015(E)d) the chemical composition of material;e) the sampling conditions of specimen from material and its machining conditions (when a specimen is heat treated, its conditions are included);f) the m
49、echanical properties of material such as bending strength, elastic modulus, fracture toughness value, etc.;g) the date of test, test place, and name of test person. ISO 2015 All rights reserved 7BS ISO 17170:2015ISO 17170:2015(E) ISO 2015 All rights reservedICS 81.060.30Price based on 7 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporate
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