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Accession Number ADA566371
Title Mechanical Testing of Silicon Carbide on MISSE-7.
Publication Date Jul 2012
Media Count 28p
Personal Author D. B. Witkin
Abstract Silicon carbide (SiC) mechanical test specimens were included on the second Optical and Reflector Materials Experiment (ORMatE II), which was part of the seventh Materials on the International Space Station (MISSE-7) flight experiment. The SiC mechanical test specimens on the MISSE experiments were intended to determine whether LEO would degrade SiC's mechanical strength. Two suppliers provided materials that were used to prepare two kinds of flexural strength tests: modulus of rupture (a uniaxial strength test) and equibiaxial flexural strength. Samples were on orbit for approximately seventeen months, generally in an Earth-facing position. The results of strength testing of the flight samples were compared to two other sets of data for each vendor's material. Traveler samples were integrated into a flight-like tray and retained in the laboratory and were tested after the flight samples, while source material represented extra specimens that were not used to populate the flight or traveler trays and were tested before the MISSE-7 flight samples were deployed on orbit. Different statistical methods were used to compare the various datasets to determine whether the mechanical strength of the materials had been changed by LEO exposure. The conclusion was that the strength did not change as a result, which is consistent with results for SiC that had been previously flown on MISSE-6.
Keywords Degradation
Experimental design
Flexural properties
Silicon carbides
Space environments

Source Agency Non Paid ADAS
NTIS Subject Category 99D - Basic & Synthetic Chemistry
46E - Structural Mechanics
84G - Unmanned Spacecraft
Corporate Author Aerospace Corp., El Segundo, CA. Space Materials Lab.
Document Type Technical report
Title Note Technical rept.
NTIS Issue Number 1307
Contract Number N/A

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