Degradation on a mechanical property of high-modulus aramid fiber due to hyperthermal atomic oxygen beam exposures

Lipika Ghosh, Hiroshi Kinoshita, Nobuo Ohmae

Research output: Contribution to journalArticle

21 Citations (Scopus)


High-modulus aramid fiber was exposed to energetic (5 eV) atomic oxygen, which simulates the space environment in low Earth orbit. It was found that Young's modulus and tensile strength decreased significantly due to the atomic oxygen exposures. X-ray photoelectron spectroscopy showed that the decomposition of amid group occured at the exposed surfaces. Scanning electron microscopy revealed that the diameter of the fiber was not influenced so much by the attack of atomic oxygen, but the exposed fiber became an extremely rough surface. The change in mechanical properties has been explained by the formation of surface texture that is characteristic to the high-energy atomic oxygen collisions.

Original languageEnglish
Pages (from-to)1611-1616
Number of pages6
JournalComposites Science and Technology
Issue number7-8
Publication statusPublished - Jun 2007
Externally publishedYes



  • Aramid fibers
  • Atomic oxygen
  • Low Earth orbit
  • Mechanical properties
  • Tether satellite

ASJC Scopus subject areas

  • Engineering(all)
  • Ceramics and Composites

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