XPS Study of Property Changes of The Themal Control Coatings with 110keV Proton Irradiation

Abstract：

Irradiation of 110keV proton beam with exposure ranging from 1.0×10¹¹to 1.0×10¹⁷p/cm² onto the thermal control coatings of 6 different materials was performed, the changes of thermal properties were investigated and the surface chemical structure was analyzed by X-ray photoelectron spectroscopy XPS. It showed that the thermal properties of all the specimens was no obvious change and the surface chemical structure such as the chemical shift and elemental ratios changed little with the proton exposure less than 1.0×10¹⁴p/cm².Nevertheless, the thermal properties and surface chemical structure changed significantly with the proton exposure over 1.0×10¹⁴p/cm², for all the specimens the elemental ratio of C increased while the element ration of O decreased on the other hand. It is revealed that the proton irradiation with proper energy and fluence could improve the thermal properties of some thermal control coating of low solar absorptance.The changes both of the physics property and the surface chemical structure of the thermal control coatings resulting from the proton irradiation took place in phase.