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  • 1
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    Space Shuttle - A new era in transportation (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: After a brief historical review of the economics of expendable-booster, commercial-payload operations to date, and a description of the Space Shuttle system's design, operational capabilities, and mission profile, the payload flight assignments, materials processing experiments, and Spacelab I material science experiment are detailed. Among the Materials Processing in Space (MPS) fields for investigation are crystal growth from vapor and solution, the production of magnetic composites and metal foams, laser host glasses and metallic glasses, non-buoyancy-driven convections, unidirectional solidification of eutectics, and the solidification of immiscible alloys. Emphasis is put on the long-term, commercial usefulness of such studies, with attention to historical precedents such as the Skylab, Apollo and Apollo-Soyuz programs.
    Keywords: SPACE TRANSPORTATION
    Type: American Ceramic Society Bulletin; 60; Nov. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Materials processing in space; Proceedings of the Special Conference, Cincinnati, OH, May 4, 5, 1982 (1983)
    In:  Other Sources
    Details
    Publication Date: 2016-03-09
    Description: An international review of materials processing in space is provided, taking into account the NASA materials processing in space program, European activities in the field of microgravity research, and Japanese material processing tests in space. The subjects considered are related to materials processing in a microgravity environment, industrial and university applications and involvement, and challenges and prospectives of microgravity research in space. Attention is given to a review of the containerless processing technologies and facilities, glass research in space, bubble behavior in molten glass in a temperature gradient, semiconductor crystal growth and segregation problems on earth and space, seeded crystal growth of pseudobinary systems with large liquidus-solidus separation, avenues and incentives for commercial use of a low-gravity environment, and the Universities Space Research Association and its role in the materials processing in space program.
    Keywords: ASTRONAUTICS (GENERAL)
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Effect of microstructure on Na/+/ diffusion in beta alumina (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The effect of microstructural features, such as grain size and orientation, on sodium ion diffusion in polycrystalline beta alumina is investigated; the ionic solid is suitable for use in high-energy and power density batteries. Two types of hot-pressed polycrystalline samples are studied, one with grains highly oriented in the direction normal to the pressing direction, the other with significantly less preferred orientation normal to the pressing direction. Results of the experimental assessments indicate that grain size and diffusion path tortuosity have little effect on diffusion kinetics, while grain boundary type and grain aspect ratio are important factors in determining the diffusion rate.
    Keywords: NONMETALLIC MATERIALS
    Type: International Materials Symposium; Aug 24, 1976 - Aug 27, 1976; Berkeley, CA
    Format: text
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    NASA TECHNICAL REPORTS
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