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  • 1
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    Unknown
    Process Yields Strong, Void-Free Laminates (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Need for lightweight materials as structural components for future space transportation systems stimulated development of systematic method for manufacturing a polyimide/graphite composite. Laminates manufactured by process are void-free, exhibit excellent thermo-oxidative stability up to 315 degrees C (600 degrees F) and are 40 percent lighter than aluminum. Process is precise, repeatable, and ideally suited for researchers and small-lot producers of composite materials.
    Keywords: FABRICATION TECHNOLOGY
    Type: LAR-12982 , NASA Tech Briefs (ISSN 0145-319X); 7; 2; P. 203
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Simplified systematic production of graphite/polymide prepreg (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Systematic method of producing preimpregnated polymide/graphite material is ideally suited for researchers and small lot producers of composite structures.
    Keywords: MATERIALS
    Type: LAR-12266 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Apparatus for Sizing and Rewinding Graphite Fibers (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Equipment ideally suited for research and development of new sizing solutions. Designed expecially for applying thermoplastic sizing solutions to graphite tow consisting of 3,000 to 12,000 filaments per tow, but accommodates other solutions, filament counts, and materials other than graphite. Closed system containing highly volatile methylene chloride vapors. Also ventilation system directly over resin reservoir. Concept used to apply sizing compounds on fiber tows or yarn-type reinforcement materials used in composite technology. Sizing solutions consist of compounds compatible with thermosets as well as thermoplastics.
    Keywords: FABRICATION TECHNOLOGY
    Type: LAR-13323 , NASA Tech Briefs (ISSN 0145-319X); 9; 4; P. 164
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Nondestructive spot tests allow rapid identification of metals (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Ordered qualitative test sequence, presented in flow chart form, permits identification of all common metallurgical elements and many high-temperature, stainless, high and low carbon, and tool steels within about 30 minutes. Identification is made from colors or specific reactions produced by the addition of standard chemical reagents.
    Keywords: MATERIALS
    Type: LAR-10539
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Flexural Properties of Aramid-Reinforced Pultrusions (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Four resin systems show improved properties after postcuring. Comparison of flexural properties made of pultrusions reinforced by Kevlar (or equivalent) aromatic polyamide and having constant fiber volume and varied matrices, pretreatments, and postcures. Objective of study to improve flexural properties of pultrusion reinforced with Kevlar (or equivalent). Advantages of using pultrusion process, over conventional hand-layup methods included higher production rates, low facility and labor requirements, and reduced manufacturing costs of advanced composites.
    Keywords: MATERIALS
    Type: LAR-13442 , NASA Tech Briefs (ISSN 0145-319X); 11; 2; P. 46
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Pultrusion Fabrication of Long Boom Models (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Composite materials of quasi-isotropic strength obtained. Fiberreinforced polymer matrix material produced by pulling fibers through polymer resin system and then through preforming dies and heated curing die. Experiments with pultrusion conducted in advancedcomposites technology with applications to aeronautical and space structures.
    Keywords: FABRICATION TECHNOLOGY
    Type: LAR-13441 , NASA Tech Briefs (ISSN 0145-319X); 11; 3; P. 70
    Format: text
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    NASA TECHNICAL REPORTS
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