Degradation on a mechanical property of high-modulus aramid fiber due to hyperthermal atomic oxygen beam exposures
Degradation on a mechanical property of high-modulus aramid fiber due to hyperthermal atomic oxygen beam exposures
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DOI：
10.1016/j.compscitech.2006.07.005
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发表时间：
2007-06
影响因子：
9.1
通讯作者：
Lipika Ghosh;H. Kinoshita;N. Ohmae
中科院分区：
文献类型：
--
作者：
Lipika Ghosh;H. Kinoshita;N. Ohmae
高模量芳纶纤维暴露于高能（5eV）原子氧，这模拟了低地球轨道的空间环境。结果发现，杨氏模量和拉伸强度显着下降，由于原子氧暴露。X射线光电子能谱分析表明，酰胺基的分解发生在暴露的表面。扫描电子显微镜显示，纤维的直径没有受到原子氧的攻击，但暴露的纤维成为一个非常粗糙的表面。机械性能的变化已被解释为表面织构的形成，这是高能原子氧碰撞的特征。
High-modulus aramid fiber was exposed to energetic (5eV) 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.