1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2009 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3753B AEROSPACE MATERIAL SPECIFICATION AMS3753 REV. B Issued 1983-07 Reaffirmed 1998-09 Re
5、vised 2009-07 Superseding AMS3753A Microspheres, Carbon Hollow RATIONALE This document has been revised to remove specific military requirements described in former sections 4.2.2.1, 5.1.5, and 8.4. MIL-STD-2073-1 was also deleted from section 2.3 since it was referenced in section 5.1.5. 1. SCOPE 1
6、.1 Form This specification covers carbon in the form of hollow microspheres. 1.2 Application This product has been used typically as a filler material in syntactic foam shapes, but usage is not limited to such applications. 1.3 Safety - Hazardous Materials While the materials, methods, applications,
7、 and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous ma
8、terials and to take necessary precautionary measures to ensure the health and safety of all personnel involved. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may
9、 work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAE Publications Available from SAE International, 40
10、0 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2825 Material Safety Data Sheets Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without l
11、icense from IHS-,-,-SAE AMS3753B Page 2 of 6 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 280 Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigm
12、ents ASTM D 1895 Apparent Density, Bulk Factor, and Pourability of Plastic Materials ASTM D 2841 Sampling Hollow Microspheres 3. TECHNICAL REQUIREMENTS 3.1 Material Thin walled carbon microspheres filled with an inert gas. 3.2 Finish Microspheres shall not be finished or coated. 3.3 Properties The p
13、roduct shall conform to the requirements shown in Table 1; tests shall be performed on the product supplied and in accordance with specified test methods. TABLE 1 - PROPERTIES Paragraph Property Requirement Test Method 3.3.1 Bulk Density 0.012 to 0.020 g/cm3ASTM D 1895 3.3.2 Size Distribution, Sieve
14、 Analysis 4.5.1 3.3.2.1 Weight retained on No. 50 mesh (300 m) screen, maximum 2% 3.3.2.2 Weight passing through No. 325 mesh (45 m) screen, maximum 25% 3.3.3 Volatile Content, maximum 2% 4.5.2 3.3.4 Ash Content, maximum 4% 4.5.3 3.4 Quality The microspheres, as received by purchaser, shall be unifo
15、rm in quality and condition, smooth, and free from foreign materials and from imperfections detrimental to usage of the microspheres. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of microspheres shall supply all samples for vendors tests and shall be responsible for t
16、he performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the microspheres conform to specified requirements. 4.2 ClassifIcation of Tests 4.2.1 Acceptance Tests Bulk density (3.3.1), size distribution (3.3.2),
17、 and quality (3.4) are acceptance tests and shall be performed on each lot. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3753B Page 3 of 6 4.2.2 Preproduction Tests Tests for all technical
18、requirements are preproduction tests and shall be performed prior to or on the initial shipment of microspheres to a purchaser, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing 4.3.1
19、 For Acceptance Tests Each lot of microspheres shall be sampled in accordance with ASTM D 2841, using spike sampler “B“ modified for small containers, at random to provide sufficient product to perform all required tests. The number of determinations for each requirement shall be as specified in the
20、 applicable test procedure or, if not specified therein, not less than three. 4.3.1.1 A lot shall be all microspheres produced in a continuous production run from the same batch of raw materials under the same fixed conditions and presented for vendors inspection at one time. An inspection lot shall
21、 not exceed 800 pounds (363 kg) of microspheres. 4.3.1.2 When a statistical sampling plan has been agreed upon by purchaser and vendor, sampling shall be in accordance with such plan in lieu of sampling as in 4.3.1 and the report of 4.6 shall state that such plan was used. 4.3.2 For Preproduction Te
22、sts As agreed upon by purchaser and vendor. 4.4 Approval 4.4.1 Sample microspheres shall be approved by purchaser before microspheres for production use are supplied, unless such approval be waived by purchaser. Results of tests on production microspheres shall be essentially equivalent to those on
23、the approved sample. 4.4.2 Vendor shall use ingredients, manufacturing procedures, processes, and methods of inspection on production microspheres which are essentially the same as those used on the approved sample microspheres. If necessary to make any change in ingredients, in type of equipment fo
24、r processing, or in manufacturing procedures, vendor shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, sample microspheres. Production microspheres made by the revised procedure shall not be shipped prior to receipt of reapproval. 4
25、.5 Test Methods 4.5.1 Size Distribution, (Sieve Analysis) 4.5.1.1 Place 50 mesh (300 m) sieve on top of a 325 mesh (45 m) sieve and pan. Weigh a 25 gram 0.5 sample of microspheres and pour into the 50 mesh (300 m) sieve. Cover. 4.5.1.2 Install sieve assembly on a Thomas shaker, operating at 190 RPM,
26、 for 30 minutes 1. Weigh microspheres remaining on the 50 mesh (300 m) sieve. Weigh microspheres on pan. 4.5.1.3 Calculate the percentage retained and passing the sieves as shown in Equation 1 and Equation 2. ( )( )Amount retained on No. 50 mesh 300 m screen, %, maximumamount of sample on No. 50 mes
27、h 300 m screen100original sample amount=(Eq. 1) Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3753B Page 4 of 6 Amount passing through No. 325 mesh (45 m) screen, %, maximum =amount of sampl
28、e on pan100original sample amount(Eq. 2) 4.5.2 Volatile Content Shall be determined in accordance with ASTM D 280. Sample size shall be the capacity of the weighing bottle. Report the average of three determinations. 4.5.3 Ash Content 4.5.3.1 Use only microspheres which have been previously tested f
29、or volatile content and have been stored in a desiccator for this test. 4.5.3.2 Dry five shallow form, 50 mL capacity, 80 mm rim height mullite combustion dishes in a muffle furnace at 700 C 5 (1292 F 9) for not less than 30 minutes. 4.5.3.3 Remove dishes from furnace, cool to below 300 C (572 F), a
30、nd place in desiccator to cool to room temperature. 4.5.3.4 Weigh the dishes at room temperature to the nearest 0.0001 gram and record weight, (W1). Spoon in approximately 2 grams of microspheres to the dishes. Reweigh all dishes, (W3). 4.5.3.5 Return dishes to 700 C 5 (1292 F 9) furnace for not les
31、s than two hours. 4.5.3.6 Remove the dishes from the furnace. If there is no black residue, proceed. If there is a black residue, return the dishes to the furnace for not less than 0.5 hour or until all black residue is gone. Allow the dishes to cool to below 300 C (572 F) and place in a desiccator
32、to cool to room temperature. 4.5.3.7 Weigh the filled dishes to the nearest 0.0001 gram, (W2). 4.5.3.8 Calculate the % ash as shown in Equation 3. 2131WW% Ash = 100WW(Eq. 3) Where: W1= weight of empty dish W2 = weight of dish and contents after heating W3 = weight of dish and contents before heating
33、 4.6 Reports The vendor of microspheres shall furnish with each shipment a report showing the results of tests to determine conformance to the acceptance test requirements and stating that the microspheres conform to the other technical requirements. This report shall include the purchase order numb
34、er, lot number, AMS3753B, vendors product designation, date of manufacture, and quantity. 4.6.1 A material safety data sheet conforming to AMS2825, or equivalent, shall be supplied to each purchaser prior to, or concurrent with, the report of preproduction test results or, if preproduction testing b
35、e waived by purchaser, concurrent with the first shipment of microspheres for production use. Each request for modification of formulation shall be accompanied by a revised data sheet for the proposed formulation. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo rep
36、roduction or networking permitted without license from IHS-,-,-SAE AMS3753B Page 5 of 6 4.7 Resampling and Retesting If any sample used in the above tests fails to meet the specified requirements, disposition of the microspheres may be based on the results of testing three additional samples for eac
37、h original nonconforming sample. Failure of any retest sample to meet the specified requirements shall be cause for rejection of the microspheres represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Packaging and Identification 5.1.1 The microspheres shall be packed i
38、n sealed, moisture-resistant plastic bags. 5.1.1.1 Microspheres may be packaged in small quantities and delivered under the basic lot approval provided lot identification is maintained. 5.1.2 Individual bags of microspheres shall be packed in an exterior container capable of protecting the microsphe
39、res, during shipment and storage, against damage from exposure to weather or any other normal hazard. 5.1.3 Each bag and each exterior shipping container shall be legibly marked with not less than the following information so that the markings will not smear or be obliterated during normal handling
40、or use: HOLLOW CARBON MICROSPHERES AMS3753B MANUFACTURERS IDENTIFICATION PURCHASE ORDER NUMBER DATE OF MANUFACTURE LOT NUMBER QUANTITY 5.1.4 Containers of microspheres shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertai
41、ning to the handling, packaging, and transportation of the microspheres to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Microspheres not
42、conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (|) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous
43、issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. Copyright SAE International Provided
44、by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3753B Page 6 of 6 8.2 Dimensions and properties in inch/pound units and the Celsius temperatures are primary; dimensions and properties in SI units and the Fahrenheit temperatures a
45、re shown as the approximate equivalents of the primary units and are presented only for information. 8.3 Purchase documents should specify not less than the following: AMS3753B Size of individual packages desired Quantity of microspheres desired. PREPARED BY AMS COMMITTEE “P“ Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
