1、INCH-POUND I. MIL-F-64156 15 October 1990 MILITARY SPECIFICATION FABRIC, CARBON (GRAPHITE) FIBER, NICKEL-COATED This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for nickel- coated
2、carbon (graphite) yarn and woven fiber cloth for use as a a conductive surface ply to provide lightning strike protection to composites structures. Materials described herein are typically impregnated with a compatible epoxy resin. 1.2 Classification. The nickel-coated carbon (graphite) cloth covere
3、d by this specification shall be plain-weave fabric constructed from yarns having a nominal filament: count of 3,000 (3k). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Standards. The following standards form a part of this specification to the extent specified herein. Unless otherwise spe
4、cified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. STANDARDS FEDERAL FED-STD-102. - Preservation, Packaging, and Packing Levels FED-STD-191 - Textile T
5、est Methods MILITARY MIL-STD-1757 - Lighting Qualification Test Techniques For Aerospace Vehicles and Hardware Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, JS Army Laboratory Comman
6、d, Materials Technology Laboratory, ATTN: SLCMT-MEE, Watertown, MA 02172-0001 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AREA CMPS AMSC N/A DISTRIBUTION STATEMENT A Approved for Public Release; Distribution Unlimited.
7、 a Licensed by Information Handling ServicesMIL-F-64156 2.1.2 Other Government documents. The following Government document, forms a part of this specification to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. OSHA 2206 Occupational Safety an
8、d Health, Genexal Industrial Standards (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The fo
9、llowing documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in t
10、he DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D123 ASTM D3800 - Standard Test Method for Density of High-Modulus Fibers ASTM D3990 - Terminology Relating to Fabric Defects ASTM D4018 - Standard Test Methods for T
11、ensile Properties of Continuous - Terminology Relating to Textiles Filament Carbon and Graphite Yarns, Strands, Rovings, and Tows (Applications for copies of ASTM publications should be addressed to American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) In the event o
12、f a conflict between the text of 2.3 Order of precedence. this document and the references cited herein, the text of this document takes precedence. Nothing in this document, howeverl supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First
13、article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.3 and 6.2). 3.2 *Constituent materials. 3.2.1 Reinforcement. Carbon (graphite) fibers to be nickel-coated and used in the yarn and woven cloth shall have a minimum tensile streng
14、th of 350 ksi (2413 MPa) and a modulus of at least 27 Msi (186 GPa). The carbon . (graphite) fiber lot number, density, tensile strength, and modulus certification data shall be supplied to the procuring activity. 3,2.2 Nickel-coating. Each carbon (graphite) filament in the 3k yarn shall be coated w
15、ith nickel. The nominal weight percentage of this nickel-coating shall be 50 percent. 2 1 i Licensed by Information Handling ServicesMIL-F-6415b CM W 777770b 0454753 W MIL-F-64156 3.2.3 Tracer yarn, Tracer yarn shall be woven into the cloth. The warp tracer yarns shall be spaced 2 L 0.25 inches (50
16、$: 5 mm) apart across the cloth width, and the fill tracer yarns 6 2 1.0 (150 2 25 mm) along the length of the cloth. No nickel-coated carbon (graphite) yarns shall be deleted to incorporate the tracer yarns. Tracer yarns shall not be wound around any nickel-coated carbon (graphite) yarns. Tracer ya
17、rns shall be fiberglass; the color shall be red. inches apart 3.2.4 Sizing or surface finish. Sizings or surface finishes shall not be employed on the pre-nickel-coated carbon (graphite) fiber. Any surface finish or fiber treatment employed on the exterior of the nickel-coated carbon (graphite) fibe
18、r to improve the weaving Characteristics of the yarn shall not degrade the properties of the yarn or hinder the bonding characteristics of the impregnating resin to the coated fibers. 3.2.5 Serving. A water-soluble serving material may be employed to improve the weaved characteristics of the yarn. u
19、pon completion of the weaving process to allow for proper spreading of the nickel- coated carbon (graphite) yarn. All serving must be removed 3.2.6 Selvage. Selvage width shall be no greater than 1.25 inches (32 mm). Selvage thickness shall be comparable with prepreg thickness. Aramid (Kevlar) or eq
20、uivalent fibers shall be used for selvage. 3.3 Physical properties. 3.3.1 Coated yarn. The nickel-coated carbon (graphite) yarn shall meet the physical property requirements of table I when tested in accordance with 4.5.1.1. 3.3.2 Woven fabric. The nickel-coated carbon (graphite) woven fabric shall
21、meet the physical property requirements of table II when tested in accordance with 4.5.1.2. 3.4 Mechanical properties. The nickel-coated carbon (graphite) yarn shall meet the mechanical property requirements of table III when tested in accordance with 4.5.2.1.1. 3.5 Dimensions. 3,5.1 Width. The wove
22、n fabric width shall be as specified in the purchase order or contract. greater than - + 0.50 inch (+ 12.7 mm). The width variation of a single roll shall be not 3.5.2 Alignment. The orientation of the fill yarns in woven fabric shall not deviate from a straight line perpendicular to the edge of the
23、 material, by more than 1 inch (2.54 mm) in any 12 inches (305 mm), or 2 inches (51 mm) in the total width of the material. 3.6 Workmanship. The coated carbon (graphite) yarn and woven fabric shall be uniform in quality and workmanship, and free of foreign materials and imperfections detrimental to
24、appearance or performance of fabricated parts. 3 Licensed by Information Handling ServicesMIL-F-64156 3.6.1 Yarn defects. Individual yarns shall be free of crimps, creases, tears, and uncoated areas. Yarn splices shall be limited to four per linear yard (meter). 3.6.2 Fabric defects. Defects in the
25、woven fabric shall be limited as follows : (a) No more than four spliced yarns, hung filling yarns, or fuzzballs shall be allowed in any linear yard o the woven fabric. (b) No more than one kinked or floating yarn, irregular or missing yarn, or unspliced broken yarn shall be allowed in any linear ya
26、rd.of the woven fabric. Broken warp ends shall not: be separated by more than 0.25 inch (6.35 mm). (cl All fabric tears, cuts, weave separations, or splices shall be handled as nonconforming areas. 3.6.3 Nonconforming areas. The following critria shall apply to nonconforming areas of the material. (
27、a) Areas of the nickel-coated carbon (graphite) tow not meeting the criteria established in 3.6.1 shall not be considered as part of the acceptable material. (b) Areas of the woven fabric not meeting the criteria established in 3.6.2 and 3.5 shall be identified by inserts or flags which extend beyon
28、d the edge of the material selvage. Such areas shall not be considered as part of the acceptable material. (c) Net footage of nonconforming material in each roll shall be reported in the supplier acceptance inspection test report, or itemized in a discrepancy report. 3.6.4 Defect limitations. 3.6.4.
29、1 Individual fiber lots, Individual lots of nickel-coated carbon (graphite) yarn supplied to this specification shall contain no more than 1 percent (of the total linear footage.) nonconforming material. 3.6.4.2 Individual fiber rolls. Individual rolls of woven fabric supplied to this specification
30、shall contain no more than 5 percent (of this total linear Eootage) nonconforming material. 3.6.5 Nonconforming material. 3.6.5.1 Nonconforming nickel-coated carbon (graphite) yarn. Nickel-coated carbon (graphite) yarn not meeting the requirements of 3.6.1, 3.6.4.1 and tables 1 and III is not accept
31、able and shall be rejected. I a. E 3.6.5.2 Nonconforming woven nickel-coated carbon (graphite) material. Woven nickel- coated carbon (graphite) material not meeting the requirements of 3.5, 3.6.4.2, and table II is not acceptable-and shall be rejected. 4 Licensed by Information Handling ServicesP MI
32、L-F-64156 .3.7 Lightning protection. Woven nickel-coated graphite cloth made in accordance with this specification shall be impregnated with appropriate resin and tested in accordance with MIL-STD-1757A. The configuration of the test specimen shall conform to its end use. 3.8 Nickel adhesion test. Y
33、arn (tow) for use in the fabric shall pass an adhesi on test when tested in accordance with 4.5.3. 3.9 Safety. Provisions for storage, handling, use, and disposal of hazardous material listed herein shall be as specified in OSHA 2206 Federal and State regulations. Personnel working to this specifica
34、tion shall follow those provisions. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except a
35、s otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set
36、forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for cornpliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a p
37、art of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirement
38、s of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective
39、material. 4.1.2 Certificate of compliance (COC). Unless otherwise specified in the contract or purchase order, the supplier shall furnish with each shipment, a certificate of compliance (in triplicate) signed by a duly authorized representative of the supplier, stating compliance with the requiremen
40、ts specified herein and listing the specific results of all the acceptance tests. The certificate of compliance shall also include this specification number, the purchase order number, and the batch number. 4.2 Classification of inspections. The inspection requirements specified herein are classifie
41、d as follows: 4.2.1 First article (i.e., preproduction) inspection (see 4.3) 4.2.2 Quality conformance (i.e., lot acceptance) inspection (see4.4) 4.3 First article inspection. 5 Licensed by Information Handling ServicesMIL-F-64156 4.3.1 First article tests. First article tests include all tests and
42、requirements listed in this specification. All materials which have been properly stored and handled shall be capable of meeting all tests and requirements. 4.3.2 First article sampling. First article inspection shall be based upon the manufacture and successful test of at least one batch of materia
43、l, 4.3.3 Changes in materials. No change in product formulation, raw , materials, production equipment, manufacturing procedures, or methods of inspection and testing, shall be made without notification and approval by the procuring activity. No production material made.by the revised procedure shal
44、l be shipped prior to the receipt of written approval; 4.3b4 Process control document. Material shall be manufactured to a contractor-approved process control document that shall contain at least the following: (a) Procurement specification for raw materiais, (b) Quality standards for the final prod
45、uct, (cl In-process inspection/control procedures. (d) Test methods, sampling plans, and acceptance/rejection criteria for (a) through (cl. 4.4 Quality conformance inspection. 4.4.1 Acceptance testing. Acceptance tests are those tests to be performed on each batch of material in a shipment. activity
46、 shall perform acceptance tests as indicated in table IV. The supplier and procuring 4.4.2 Supplier quality control. The yarn and fabric suppliers shall perform acceptance tests as specified in table IV. Results of these tests shall be included in the supplier acceptance test report as required in 4
47、.4.2.2. Supplier test methods and procedures may be substituted for methods specified herein, with approval from the procuring activity. 4.4.2.1 Supplier sampling. 4.4.2.1.1 Yarn sampling. Each lot of nickel-coated carbon (graphite) yarn shall be tested as required in table IV. Test sampling shall b
48、e in accordance with the following schedule: I Pounds of Nickel-Coated Fibers Per Lot Numbers of Samples Up to 400 6 401 and over 8 6 Licensed by Information Handling ServicesMIL-F-64156 4.4.2.1.2 Fabric sampling. Each roll of nickel-coated carbon (graphite) fabric shall be tested for comformance to
49、 the physical property tests specified in table IV. The woven fabric shall be visually inspected in its entirety for conformance to the applicable protions of 3.4. 4.4.2.2 Acceptance reports. 4.4.2.2.1 Coated carbon (graphite) yarn supplier. The supplier of the coated carbon (graphite) yarn shall furnish with each shipment a copy of a report that shall include: (a) Order number and appicable specification number. (b) Suppliers material designation. (cl Quantity of product in the shipment. (d) Lot or batch number. (e) A copy of the carbon (graphite) fiber certification data. (f) A
