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  • Other Sources  (6)
  • 2000-2004
  • 1995-1999  (3)
  • 1990-1994  (3)
  • 1975-1979
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  • 1
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    Effects of heat treatment on carbon fibers (1990)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Commercially produced carbon fibers were heat treated to graphitization temperatures. The fibers were characterized for mechanical and physical properties, including density, D0002 spacing, strength, and modulus in both the 'as received' and heat treated conditions. Mechanical property changes were correlated with the physical property changes in the fibers.
    Keywords: NONMETALLIC MATERIALS
    Type: SAMPE Journal (ISSN 0091-1062); 26; 9-14
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Multi Band Gap High Efficiency Converter (Rainbow) (1997)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This papter reprots on the reexamination of the spectrally split, individually matched cell approach using modern-day optics and lightweight structures.
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    NASA TECHNICAL REPORTS
  • 3
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    Loss of Alkali Oxide From Beta Alumina and its Importance to AMTEC Life Issues (1997)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: Loss of sodium oxide into a gas phase comprises of low to high pressure sodium at typical AMTEC operating conditions does not seem indicated as a life limiting step under projected conditions.
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Graphite-Fiber Heat Radiators (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Heat radiators of proposed type feature thermally conductive fibers protruding from metallic surfaces to provide increased heat-dissipation surface areas. Free of leaks and more reliable than radiators incorporating heat pipes. Also lightweight and relatively inexpensive. Radial graphite fibers carry heat away from spherical shell and radiate heat into space. Radiators prove useful on Earth in special industrial and scientific applications involving dissipation of heat in vacuum or in relatively still air.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-19298 , NASA Tech Briefs (ISSN 0145-319X); 19; 12; P. 57
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Manganese Nitride Sorption Joule-Thomson Refrigerator (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Proposed sorption refrigeration system of increased power efficiency combines MnxNy sorption refrigeration stage with systems described in "Regenerative Sorption Refrigerator" (NPO-17630). Measured pressure-vs-composition isotherms for reversible chemisorption of N2 in MnxNy suggest feasibility to incorporate MnxNy chemisorption stage in Joule-Thomson cryogenic system. Discovery represents first known reversible nitrogen chemisorption compression system. Has potential in nitrogen-isotope separation, nitrogen purification, or contamination-free nitrogen compression.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-17811 , NASA Tech Briefs (ISSN 0145-319X); 16; 7; P. 58
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Filament Winding Of Carbon/Carbon Structures (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Improved method of winding carbon filaments for carbon/carbon composite structures less costly and labor-intensive, also produces more consistent results. Involves use of roller squeegee to ensure filaments continuously wet with resin during winding. Also involves control of spacing and resin contents of plies to obtain strong bonds between carbon filaments and carbon matrices. Lends itself to full automation and involves use of filaments and matrix-precursor resins in their simplest forms, thereby reducing costs.
    Keywords: FABRICATION TECHNOLOGY
    Type: NPO-18163 , NASA Tech Briefs (ISSN 0145-319X); 15; 10; P. 95
    Format: text
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    NASA TECHNICAL REPORTS
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