17 September 2007 HB-Cesic composite for space optics and structures
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Abstract
One of the key technologies for next generation space telescopes requiring large-scale reflectors are light-weight materials having high specific strength, high specific stiffness, low coefficient of thermal expansion and high coefficient of thermal conductivity. Several candidates, such as fused silica, beryllium, silicon carbide and carbon fiber reinforced composites, have been evaluated. An example of the latter material is a Hybrid Carbon-Fiber Reinforced SiC composite or HB-Cesic - a trademark of ECM - which has been developed by ECM and MELCO to meet the stringent space telescope requirements. Mechanical performance, such as stiffness, bending strength and fracture toughness, were significantly improved using HB-Cesic compared to our classic Cesic material. Thermal expansion and thermal conductivity of HB-Cesic at cryogenic temperatures are now partly established and excellent performance for large future space mirrors and structures are expected. In this paper we will report on the current status of development of HB-Cesic and describe the first successful applications made with this new improved material.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Matthias R. Krödel, Matthias R. Krödel, Tsuyoshi Ozaki, Tsuyoshi Ozaki, } "HB-Cesic composite for space optics and structures", Proc. SPIE 6666, Optical Materials and Structures Technologies III, 66660E (17 September 2007); doi: 10.1117/12.731011; https://doi.org/10.1117/12.731011
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