Characterization of novel spacecraft materials under high energy electron and atomic oxygen exposure

Plis, E.; Bengtson, Miles; Engelhart, Daniel P.; Badura, Gregory; Scott, T; Cowardin, Heather; Reyes, Jacqueline A.; Hoffmann, Ryan; Sokolovskiy, Alexey; Ferguson, Dale C.; Shah, Jainisha; Horne, Sydney

doi:10.2514/6.2022-0797

Cited by 7 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the surface topography of the specimens was measured by AFM. From previous research, the surface roughness of PI may either increase significantly [ 11 ] or decrease after electron irradiation [ 32 ]. According to our research, the variations of the surface roughness are nonmonotonic.…”

Section: Resultsmentioning

confidence: 99%

Effects of Electron Irradiation and Temperature on Mechanical Properties of Polyimide Film

Qiu,

Ma,

Han

et al. 2023

Polymers

View full text Add to dashboard Cite

Polyimide (PI) is widely deployed in space missions due to its good radiation resistance and durability. The influences from radiation and harsh temperatures should be carefully evaluated during the long-term service life. In the current work, the coupled thermal and radiation effects on the mechanical properties of PI samples were quantitatively investigated via experiments. At first, various PI specimens were prepared, and electron irradiation tests were conducted with different fluences. Then, both uniaxial tensile tests at room temperature and the dynamic mechanical analysis at varied temperatures of PI specimens with and without electron irradiation were performed. After that, uniaxial tensile tests at low and high temperatures were performed. The fracture surface of the PI film was observed using a scanning electron microscope, and its surface topography was measured using atomic force microscopy. In the meantime, the Fourier-transform infrared spectrum tests were conducted to check for chemical changes. In conclusion, the tensile tests showed that electron irradiation has a negligible effect during the linear stretching period but significantly impacts the hardening stage and elongation at break. Moreover, electron irradiation slightly influences the thermal properties of PI according to the differential scanning calorimetry results. However, both high and low temperatures dramatically affect the elastic modulus and elongation at break of PI.

show abstract

Section: Resultsmentioning

confidence: 99%