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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Influence of Containment on the Growth of Silicon-Germanium (ICESAGE): A Materials Science Investigation
A series of Ge Si crystal growth experiments are planned to be conducted in the Low 1-x x Gradient Furnace (LGF) onboard the International Space Station. The primary objective of the research is to determine the influence of containment on the processing-induced defects and impurity incorporation in germanium-silicon alloy crystals. A comparison will be made between crystals grown by the normal and "detached" Bridgman methods and the ground-based float zone technique. Crystals grown without being in contact with a container have superior quality to otherwise similar crystals grown in direct contact with a container, especially with respect to impurity incorporation, formation of dislocations, and residual stress in crystals. "Detached" or "dewetted" Bridgman growth is similar to regular Bridgman growth in that most of the melt is in contact with the crucible wall, but the crystal is separated from the wall by a small gap, typically of the order of 10-100 microns. Long duration reduced gravity is essential to test the proposed theory of detached growth. Detached growth requires the establishment of a meniscus between the crystal and the ampoule wall. The existence of this meniscus depends on the ratio of the strength of gravity to capillary forces. On Earth, this ratio is large and stable detached growth can only be obtained over limited conditions. Crystals grown detached on the ground exhibited superior structural quality as evidenced by measurements of etch pit density, synchrotron white beam X-ray topography and double axis X-ray diffraction.
Materials Science Research Rack Onboard the International Space Station
No abstract available
NASA's Microgravity Materials Science Program: A Review of Experimental Investigations
No abstract available
Meera Dhawan's Internship Overview at the Materials Science Branch at NASA Kennedy Space Center
Overview of internship duties and failure analysis conducted on simulated lunar regolith pavers and cryogenic flex hose wires.
Overview of Materials Science & Biophysics Research from the SLPSRA Program at MSFC
No abstract available
Programmatics–SLPSRA Physical Sciences: Materials and Biophysics Status
No abstract available
RTGs: Science, Materials and Relevance of Thermoelectricity in Space Exploration
UNKNOWN
Overview of NASA’s Reduced Gravity Materials Science Research
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Advancements in Materials Science Through Space-Based Research
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Solid-State Batteries for Air and Space: Pushing Boundaries with Materials Science
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Nb3Sn: State-of-the-art performance, challenges and opportunities for materials science
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Total research activity related to the science of materials Fourth annual technical report, Jul. 1, 1964 - Jun. 30, 1965
Survey of research in materials science and solid state physics
Microgravity noncontact temperature requirements at NASA Lewis Research Center
NASA Lewis Research Center is currently supporting 66 microgravity science and applications projects. The 66 projects are separated into 23 flight projects and 43 ground-based projects. The part of the NASA Lewis program dealing with flight experiments is divided into six areas: Combustion Science, Materials Science, Fluid Physics, Instrumentation/Equipment, Advanced Technology Development, and Space Station Multi-User Facility studies. The part of the NASA Lewis program dealing with ground-based experiments is coincidentally also divided into six areas: Electronic Materials, Combustion Science, Fluid Dynamics and Transport Phenomena, Metals and Alloys, Glasses and Ceramics, and Physics and Chemistry Experiments. Several purposes exist for ground-based experimenting. Preliminary information is necessary before a decision can be made for flight status, the short low gravity durations available in ground facilities are adequate for a particular study, or extensive ground-based research must be conducted to define and support the microgravity science endeavors contemplated for space. Not all of the 66 microgravity science and application projects at NASA Lewis have temperature requirements, but most do. Since space allocation does not permit a review of all the pertinent projects, a decision was made to restrict the coverage to the science flight projects, flight projects minus the advanced technology development, and multiuser facility efforts. Very little is lost by this decision as the types of temperature requirements for science flight projects can be considered representative of those for the ground-based projects. The noncontact temperature needs at NASA Lewis, as represented by the science flight projects are discussed by describing briefly the experiments themselves, by displaying an illustration of each experimental setup, and by specifying their temperature requisites.