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1、 Reference number ISO 17352:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 17352 Second edition 2008-06-01 Hardmetals Determination of silicon in cobalt metal powders using graphite- furnace atomic absorption Mtaux durs Dosage du silicium dans les poudres mtalliques de cobalt par absorption atomique fo
2、ur graphite Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 17352:2008(E) PDF disclaimer This PDF file may c
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5、parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 Al
6、l 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 in writing from either ISO at the address below or ISOs member body in the country
7、of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under licens
8、e with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 17352:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Principle. 1 3 Reagents 1 4 Apparatus 2 5 Procedure 2 6 Ca
9、libration . 2 7 Calculation. 2 8 Precision 2 9 Test report . 3 Bibliography. 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or networking permitted without license
10、from IHS -,-,- ISO 17352:2008(E) iv PROOF/PREUVE ISO 2008 All rights reserved Foreword 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 through IS
11、O 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 collaborates c
12、losely 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 Standards. D
13、raft 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 this do
14、cument may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 17352 was prepared by Technical Committee ISO/TC 119, Powder metallurgy, Subcommittee SC 4, Sampling and testing methods for hardmetals. Copyright International Organizati
15、on for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 17352:2008(E) ISO 2008 All rights reserved 1 Hardmetals Determination o
16、f silicon in cobalt metal powders using graphite-furnace atomic absorption 1 Scope This International Standard specifies a test method, using graphite-furnace atomic absorption, to determine the mass fraction of silicon in cobalt metal powder with varying compositions within the range of 5 g/g to 40
17、 g/g. 2 Principle This test method for the chemical analysis of cobalt metal powder is to be used to determine traces of silicon. It is assumed that all those who use this test method will be trained analysts capable of performing common laboratory procedures skilfully and safely. It is expected tha
18、t all the work will be performed in a properly equipped laboratory. 3 Reagents Reagents of the highest purity and only double-distilled water or their equivalents shall be used. 3.1 Nitric acid, = 1,4 g/ml. 3.2 Hydrochloric acid, = 1,15 g/ml. 3.3 Cobalt powder, purity 99,9 % by mass. 3.4 Si solution
19、, 1,000 g/l. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 17352:2008(E) 2 ISO 2008 All rights reserved 4
20、Apparatus 4.1 Graphite-furnace atomic absorption spectrometer Follow the manufacturers instruction manual for installation and operation. 4.2 Additional information The following parameters are for information purposes only and have to be adapted to the special requirements of every laboratory. Lamp
21、: hollow cathode lamp for Si Tube: coated pyrolytic C-tube without a platform Wavelength: 251,6 nm Slit: 0,2 nm Injection volume: 20 l Temperature program: drying 120 C ashing 1 200 C atomising 2 700 C conditioning 2 750 C 5 Procedure 5.1 Test portion Weigh, to the nearest 0,001 g, approximately 0,5
22、 g of the test sample and transfer it to a 100 ml polypropylene flask. 5.2 Dissolution of the test portion The test sample is dissolved in 10 ml of nitric acid and 2 ml of hydrochloric acid. When the sample is completely dissolved, allow the flask to cool and then fill up to 100 ml with double-disti
23、lled water. 6 Calibration 0,500 g of ultrapure cobalt powder is dissolved in the same way as the test sample (see 5.2). The resulting solutions are spiked with 0 g of Si, 5 g of Si, 10 g of Si, 20 g of Si and 40 g of Si and filled up to 100 ml with water. With these calibrated solutions, a calibrati
24、on curve is prepared. 7 Calculation Calculate the mass fraction of silicon in the sample using the calibration curve prepared in Clause 6. Compensate for the actual weight of the sample analysed. 8 Precision No definite statement on the precision and bias can be made at this time. These values shall
25、 be calculated using the results of a round-robin analysis. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO
26、17352:2008(E) ISO 2008 All rights reserved 3 9 Test report The test report shall include the following information: a) a reference to this International Standard; b) all details necessary for identification of the test sample; c) the test results obtained; d) all operations not specified in this Int
27、ernational Standard, or regarded as optional; e) details of any occurrence which may have affected the result. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or netwo
28、rking permitted without license from IHS -,-,- ISO 17352:2008(E) 4 ISO 2008 All rights reserved Bibliography 1 ISO 3252, Powder metallurgy Vocabulary 2 ASTM B 243, Standard Terminology of Powder Metallurgy Copyright International Organization for Standardization Provided by IHS under license with IS
29、O Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58
30、:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 17352:2008(E) ICS 77.160 Price based on 4 pages ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/24/2008 23:58:40 MDTNo reproduction or networking permitted without license from IHS -,-,-