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  • 1
    facet.materialart.
    Unknown
    Mixing of two liquid metals on spar payload due to spin-up and spin-down (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Unexpected results from SPAR experiments, directed at obtaining fine dispersions of metal systems that in a 1-g environment tend to segregate very rapidly, were considered. The physical processes occurring in fluid samples, such as the SPAR samples before solidification, were shown to be insufficient to produce a well mixed liquid by the time solidification was initiated. This would result in solidified samples with the type of segregation noted in the SPAR samples. Experimental evidence and analytical arguments are presented.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA-TM-78144
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Analysis of SPAR 8 single-axis levitation experiment (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The melting and resolidification of SPAR 8 payload melting and resolidification of a glass specimen from the in a containerless condition and the retrieval and examination of the specimen from the. The absence of container contact was assured by use of a single-axis acoustic levitation system. However, the sample contacted a wire cage after being held without container contact by the acoustic field for only approximately 87 seconds. At this time, the sample was still molten and, therefore, flowed aroung the wire and continued to adhere to it. An analysis of why the sample did not remain levitated free of container contact is presented. The experiment is described, and experimental observations are discussed and analyzed.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA-TM-82447
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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