1、BSI Standards PublicationBS ISO 16525-6:2014Adhesives Test methods for isotropic electrically conductive adhesivesPart 6: Determination of pendulum-type shear impactBS ISO 16525-6:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16525-6:2014. The UK partici
2、pation in its preparation was entrusted to TechnicalCommittee PRI/52, Adhesives.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its cor
3、rect application. The British Standards Institution 2014. Published by BSI Standards Limited 2014ISBN 978 0 580 76958 0ICS 83.180 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strat
4、egy Committee on 31 May 2014.Amendments issued since publicationDate Text affectedBS ISO 16525-6:2014 ISO 2014Adhesives Test methods for isotropic electrically conductive adhesives Part 6: Determination of pendulum-type shear impactAdhsifs Mthodes dessai pour adhsifs conductivit lectrique isotrope P
5、artie 6: Dtermination de la rsistance au choc du type penduleINTERNATIONAL STANDARDISO16525-6First edition2014-05-15Reference numberISO 16525-6:2014(E)BS ISO 16525-6:2014ISO 16525-6:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise speci
6、fied, 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 below or IS
7、Os 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 16525-6:2014ISO 16525-6:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv
8、1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Test apparatus and circuit 25.1 Basic performance of the impact tester. 25.2 Structure of the hammer 25.3 Measurement with the hammer 35.4 Scope of test . 45.5 Structure of the tester . 45.6 Specimen-fixing stage . 55.7 Mea
9、surement instruments . 56 Specimen . 66.1 Form of specimens . 66.2 Dimensions and tolerances of specimens 66.3 Standard atmospheric conditions 67 Operation . 77.1 Loading of specimen and position of impact 77.2 Conformance of specimen . 78 Calculation of impact strength . 78.1 Calculation General 78
10、.2 Calculation of total impact energy . 78.3 Calculation of maximum force and maximum impact energy . 98.4 Checking the fracture mode 119 Test report 11Annex A (normative) Example of preparation of specimens .12Annex B (informative) Correction of data 16Bibliography .17BS ISO 16525-6:2014ISO 16525-6
11、:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Part of ISO 16525s is normally carried out through ISO technical committees. Each member body interested in a subject for which a
12、 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 matte
13、rs 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 noted. This docu
14、ment was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention 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 pat
15、ent 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. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not consti
16、tute an endorsement.The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 11, Products.ISO 16525 consists of the following parts, under the general title Adhesives Test methods for isotropic electrically conductive adhesives: Part 1: General test methods Part 2: Determi
17、nation of electric characteristics for use in electronic assemblies Part 3: Determination of heat-transfer properties Part 4: Determination of shear strength and electrical resistance using rigid-to-rigid bonded assemblies Part 5: Determination of shear fatigue Part 6: Determination of pendulum-type
18、 shear impact Part 7: Environmental test methods Part 8: Electrochemical-migration test methods Part 9: Determination of high-speed signal-transmission characteristicsiv ISO 2014 All rights reservedBS ISO 16525-6:2014INTERNATIONAL STANDARD ISO 16525-6:2014(E)Adhesives Test methods for isotropic elec
19、trically conductive adhesives Part 6: Determination of pendulum-type shear impactSAFETY STATEMENT Persons using this part of ISO 16525 should be familiar with normal laboratory practice. This part of ISO 16525 does not purport to address all of the safety problems, if any, associated with its use. I
20、t is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any regulatory conditions.IMPORTANT Certain procedures specified in this part of ISO 16525 might involve the use or generation of substances, or the generation of waste, that could
21、constitute a local environmental hazard. Reference should be made to appropriate documentation on safe handling and disposal after use.1 ScopeThis part of ISO 16525 specifies the pendulum-type test methods for impact strength of isotropic electrically conductive adhesives used in mounting components
22、 products on substrates.2 Normative referencesThe following documents, in whole or in part, 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 docume
23、nt (including any amendments) applies.ISO 291, Plastics Standard atmospheres for conditioning and testingISO 472, Plastics VocabularyISO 10365, Adhesives Designation of main failure patternsISO 13385-1, Geometrical product specifications (GPS) Dimensional measuring equipment Part 1: Callipers; Desig
24、n and metrological characteristicsISO 13385-2, Geometrical product specifications (GPS) Dimensional measuring equipment Part 2: Calliper depth gauges; Design and metrological characteristics3 Terms and definitionsFor the purposes of this document, the terms and definitions in ISO 472 and the followi
25、ng apply.3.1impact strengthability of a material to resist shock loading3.2pendulum-type impact testtest using apparatus consisting of a pendulum swinging at a sample of material ISO 2014 All rights reserved 1BS ISO 16525-6:2014ISO 16525-6:2014(E)3.3accelerometerpendulum-type device that applies imp
26、act force to a specimen3.4displacement sensorinstrument to measure the movement distance of the hammer in an impact test3.5total impact energyEtotal energy required to break a specimen in an impact testNote 1 to entry: It is expressed in joule (J).3.6maximum forceLmaximum force generated during an i
27、mpact testNote 1 to entry: It is expressed in Newton (N).3.7maximum impact energyIenergy to reach the maximum impact forceNote 1 to entry: It is expressed in joule (J).4 PrincipleThis part of ISO 16525 specifies procedures for measuring the impact properties of adhesively bonded joints manufactured
28、with isotropic electrically conductive adhesives by pendulum-type impact test.An apparatus, which consists of a pendulum head swinging at a sample of material, is used. The energy transferred to the material is measured by an accelerometer installed in the pendulum head or hammer.The total impact en
29、ergy is calculated by measuring the passing speed of the hammer.5 Test apparatus and circuit5.1 Basic performance of the impact testerThe impact tester shall meet the following requirements.a) potential energy of the pendulum: EP= 0,1 J 5 %;b) hammer speed: v1= 1,0 m/s to 1,2 m/s.5.2 Structure of th
30、e hammerA pendulum-type hammer consists of a striker (see Figure 1), which applies impact force to the specimen, and an arm, which connects the rotating shaft and the striker. The structure of the arm shall make the elastic deformation energy loss of the arm negligible.The striker shall be manufactu
31、red using durable materials, which are unlikely to be damaged when the specimen is broken. To calculate the energy accurately, the centre of gravity should be as close to the point of impact as possible. It is preferable to use a material with high specific gravity (for example tungsten).2 ISO 2014
32、All rights reservedBS ISO 16525-6:2014ISO 16525-6:2014(E)Dimensions in millimetresFigure 1 Form of the striker5.3 Measurement with the hammerTo calculate the potential energy, E, measure the vertical force, FH, and the distance, LH, from the point of impact.Measure FHwith the hammer raised so that i
33、t is perpendicular to the rotation shaft after the tester is assembled.Use Vernier callipers or a height gauge to measure LHfrom the point of impact.Use measurement devices of sufficient accuracy such that precision of the measurements is within 1 % of each result.Calculate the potential energy, EP,
34、 in joules, of the pendulum using Formula (1):EFLPHH= (cos )1 (1)where is the initial arm angle to vertical.Calculate the hammer speed, v1, (m/s) using Formula (2):vL14431=,(cos)H (2)where is the initial arm angle to vertical. ISO 2014 All rights reserved 3BS ISO 16525-6:2014ISO 16525-6:2014(E)Figur
35、e 2 Measurements necessary for calculation of potential energy5.4 Scope of testThe angle, , of the hammer arm can be set arbitrarily as shown in Figure 2. The total impact energy, E, of the specimen is less than 80 % of the initial potential energy, EP. Note that the hammer speed is 1 m/s or greater
36、.5.5 Structure of the testerThe structure of the tester is shown in Figure 3.4 ISO 2014 All rights reservedBS ISO 16525-6:2014ISO 16525-6:2014(E)8491072123456Key1 accelerometer 6 specimen-fixing stage2 specimen 7 PC3 hammer 8 AD converter4 displacement sensor 9 accelerometer charge amp.5 impact posi
37、tion 10 displacement sensor amp.Figure 3 Structure of the tester5.6 Specimen-fixing stageThe specimen-fixing stage should be stable so that it does not vibrate or release the specimen upon impact. The specimen-fixing stage should be equipped with a micromanipulator to adjust the specimen in the X-,
38、Y-, and Z-directions. It is also preferable that it has a mechanism to adjust the centre of the striker face to the centre of the specimen face to be hit.5.7 Measurement instruments5.7.1 AccelerometerMeasure the acceleration of the hammer at the time of impact using the accelerometer. Fix the accele
39、rometer near the point of impact. Choose an accelerometer with a mass that does not influence the mass of the hammer.The mass of the accelerometer should be less than 1 % of the mass of the hammer.When selecting an accelerometer, assume that the maximum acceleration generated during an impact test i
40、s 100 G. Sampling frequency should preferably be 100 kHz at least. ISO 2014 All rights reserved 5BS ISO 16525-6:2014ISO 16525-6:2014(E)5.7.2 Displacement sensorMeasure the speed of the hammer using the displacement sensor. Use a non-contact type, such as a laser-positioning sensor. Install the displ
41、acement sensor within 5 mm of the point of impact of the hammer.Resolution of measurement should not exceed 1/100 mm and sampling frequency should be 25 kHz or higher.5.7.3 Observation instrumentsBefore carrying out a test, ensure that the specimen and the tip of the striker are at the centre.Use an
42、 instrument with 5x magnification or higher to facilitate accurate location.5.7.4 Hammer releasing mechanismThe hammer releasing mechanism should be automatic (for example electromagnet-based) so that it does not influence the hammer speed. The rotation shafts of the swing arm and the hammer arm sho
43、uld preferably be independent so as to reduce mechanical friction. Measure the speed of wide swing 10 times beforehand using the built-in displacement sensor. The range of 10 measurements should be within 2 %.6 Specimen6.1 Form of specimensSpecimens should consist of the following layers: a square a
44、dherend, an isotropic electrically conductive adhesive, and a square adherend. An example of specimens is shown in Annex A.6.2 Dimensions and tolerances of specimensDimensions and tolerances of specimens are specified as follows.6.2.1 Length of the side and its measurementa) The length of the side i
45、s in the range of 2 mm to 3 mm; its tolerance shall be within 0,5 mm.b) To measure the length of the side, use Vernier callipers with a precision of 0,05 mm, as specified in ISO 13385-1 and ISO 13385-2, or equivalent in terms of precision.6.2.2 Thickness and its measurementThe range of thickness and
46、 its measurement are specified as follows.a) The thickness of a specimen column base is 0,8 mm and its tolerance is within 0,1 mm. The thickness of an isotropic electrically conductive adhesive is 0,1 mm and its tolerance is within 0,02 mm.b) To measure the thickness of the side, use Vernier callipe
47、rs with a precision of 0,02 mm, as specified in ISO 13385-1 and ISO 13385-2, or equivalent in terms of precision.6.3 Standard atmospheric conditionsThe test atmospheric conditions should, in principle, be standard temperature class 2 (23 C 5 C) specified in ISO 291. Alternative atmospheric condition
48、s may be used upon mutual agreement between the delivering and receiving parties. In such cases, record the temperature used in a test report.6 ISO 2014 All rights reservedBS ISO 16525-6:2014ISO 16525-6:2014(E)7 Operation7.1 Loading of specimen and position of impactWhen placing a specimen on the sp
49、ecimen-fixing stage, ensure that there is no gap between the stage and the bottom of the specimen. Adjust the specimen and the centre of impact within 1/10 of the dimensions of the specimen. Before starting a test, confirm that the physical relationship between the fixed side of the specimen and the specimen-fixing stage does not allow them to interfere with each other.7.2 Conformance of specimenCheck the fracture mode after testing to judge whether or not the specimen contained
