Development of a Mechanical Heat Switch Utilizing Cu–Al–Mn Shape Memory Alloys
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- Tobe Hirobumi
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
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- Ishikawa Kazuki
- Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo
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- Sawada Kenichiro
- Research Unit II, Research and Development Directorate, Japan Aerospace Exploration Agency
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- Tokoku Chihiro
- Japan Aerospace Exploration Agency/Advanced Technology Center, National Astronomical Observatory of Japan
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- Nakagawa Takao
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
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- Sato Eiichi
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
Bibliographic Information
- Other Title
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- 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
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- Journal of Japan Institute of Copper
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Journal of Japan Institute of Copper 61 (1), 334-338, 2022
Japan Institute of Copper
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Details 詳細情報について
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- CRID
- 1390857368729003008
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- ISSN
- 2435872X
- 13477234
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- Text Lang
- ja
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- Data Source
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- JaLC
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- Abstract License Flag
- Allowed