Studies of the moisture absorption of thin carbon fiber reinforced plastic substrates for x-ray mirrors
| Autor: | Kenya Yoshioka, Mizuki Nomura, Toshihiro Iwase, Tomohiro Kamiya, Takayoshi Hamada, Kazuaki Kishimoto, Tomoki Mita, Takuya Miyazawa, Naoki Shima, Shin Utsunomiya, Keiji Ogi, Yuuki Tomita, Hiromichi Akiyama, Daichi Kurihara, Naoki Ishida, Satoshi Sugita, Hironori Matsumoto, Hideyo Kunieda, Ikuyuki Mitsuishi, Takashi Ishikawa, Hisamitsu Awaki, Masato Maejima |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Fabrication
Materials science Waviness Mechanical Engineering Astronomy and Astrophysics Fibre-reinforced plastic Thermal diffusivity Accelerated aging Electronic Optical and Magnetic Materials Root mean square Substrate (building) Space and Planetary Science Control and Systems Engineering Composite material Absorption (electromagnetic radiation) Instrumentation |
| Zdroj: | Journal of Astronomical Teleccopes, Instruments, and Systems. 1(3):034003-034003-7 |
| ISSN: | 2329-4124 |
| Popis: | We study a lightweight x-ray mirror with a carbon fiber reinforced plastic (CFRP) substrate for next-generation x-ray satellites. For tightly nested x-ray mirrors, such as those on the Suzaku and ASTRO-H telescopes, CFRP is the suitable substrate material because it has a higher strength-to-weight ratio and forming flexibility than those of metals. In flat CFRP substrate fabrication, the surface waviness has a root mean square (RMS) of ～ 1 μm in the best products. The RMS approximately reaches a value consistent with the RMS of the mold used for the forming. We study the effect of moisture absorption using accelerated aging tests in three environments. The diffusivity of the CFRP substrate at 60 C and at relative humidity of 100% is ～ 9.7 × 10(exp -4) mm2･h(exp -1), and the acceleration rate to the laboratory environment was 180 times higher. We also develop co-curing functional sheets with low water-vapor transmissivity on the CFRP substrate. Co-curing the sheets successfully reduced the moisture absorption rate by 440 times compared to the un-co-cured substrate. Details of the CFRP substrate fabrication and moisture absorption tests are also reported. 形態: カラー図版あり Physical characteristics: Original contains color illustrations 資料番号: PA1610074000 |
| Databáze: | OpenAIRE |
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