Experimental investigation of catalytic and non-catalytic surface reactions on SiO2 thin films with shock heated oxygen gas
The present study is to investigate the interaction of strong shock heated oxygen on the surface of SiO2 thin film. The thermally excited oxygen undergoes a three-body recombination reaction on the surface of silicon dioxide film. The different oxidation states of silicon species on the surface of the shock-exposed SiO2 film are discussed based on X-ray Photoelectron Spectroscopy (XPS) results. The surface morphology of the shock wave induced damage at the cross section of SiO2 film and structure modification of these materials are analyzed using scanning electron microscopy and ion microscopy. Whether the surface reaction of oxygen on SiO2 film is catalytic or non-catalytic is discussed in this paper.
KeywordsShock Tube SiO2 Film Shock Speed Thermal Protection System Shock Tube Experiment
Unable to display preview. Download preview PDF.
- 1.Scott C D: Catalytic recombination of nitrogen and oxygen on high temperature reusable surface insulation, AIAA 15th Thermophysics Conference, Snowmass, Colo.,July 14-16, pp192-212, 1980.Google Scholar
- 2.Jumper E J and Seward W A: Model for oxygen recombination on silicon dioxide surfaces Part 2, implications toward reentry heating, 30th Aerospace Science Meeting & Exhibit, Reno, NV, AIAA-92-0811,January 6-9,1992.Google Scholar
- 3.Kurotaki T: Construction of catalytic model on SiO 2 - based surface and application to real trajectory, 34th AIAA Thermo physics Conference, Denver, CO, AIAA A00-33689 June,pp19-22,2000.Google Scholar