Development of a Mechanical Heat Switch Utilizing Cu–Al–Mn Shape Memory Alloys

DOI
  • Tobe Hirobumi
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
  • Ishikawa Kazuki
    Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo
  • Sawada Kenichiro
    Research Unit II, Research and Development Directorate, Japan Aerospace Exploration Agency
  • Tokoku Chihiro
    Japan Aerospace Exploration Agency/Advanced Technology Center, National Astronomical Observatory of Japan
  • Nakagawa Takao
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
  • Sato Eiichi
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency

Bibliographic Information

Other Title
  • Cu–Al–Mn形状記憶合金を用いた機械式ヒートスイッチの開発

Abstract

<p>Lunar and deep–space exploration and astronomical observation missions equipped with cooling systems for high–sensitivity observations require thermal switches (also called heat switches) that can adjust the heat flow to control the temperature inside spacecraft appropriately. In this study, we proposed a mechanical heat switch utilizing a single–crystal Cu–Al–Mn shape memory alloy for its drive unit. The effect of aging treatment on the martensitic transformation temperature (heat switch drive temperature) of a Cu–17Al–11.6Mn (at.%) alloy was investigated, and it was found that the transformation temperature could be adjusted in the range of −80 to −50°C by varying the duration from 15 min to 2 h at an aging temperature of 150°C. A prototype heat switch was fabricated using a single crystal with an orientation exhibiting a large transformation strain. Cooling–heating tests for the drive unit demonstrated thermal drive with a large displacement of approximately 0.8 mm and a small temperature hysteresis, indicating that the single–crystal Cu–Al–Mn shape memory alloy is highly applicable to heat switches.</p>

Journal

Details 詳細情報について

  • CRID
    1390857368729003008
  • DOI
    10.34562/jic.61.1_334
  • ISSN
    2435872X
    13477234
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Allowed

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