University of Illinois Urbana-Champaign

Designing experiments to develop measurements for species catalytic recombination using actinometry and optical emission spectroscopy on silicon carbide

Soliman, Ali Mohamed

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https://hdl.handle.net/2142/121375

Description

Title
Designing experiments to develop measurements for species catalytic recombination using actinometry and optical emission spectroscopy on silicon carbide
Author(s)
Soliman, Ali Mohamed
Issue Date
2023-07-21
Director of Research (if dissertation) or Advisor (if thesis)
Panerai, Francesco
Department of Study
Aerospace Engineering
Discipline
Aerospace Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
  • Aerospace
  • Atmospheric Re-entry
  • Thermal Protection System
  • TPS
  • Material Testing
  • Actinometry
  • Optical Emission Spectroscopy
  • SOL-GEL
  • Silicon Carbide
  • SiC
  • Oxidation
  • Silica
Abstract
This thesis aims to present a study of surface catalytic recombination using optical emission actinometry. The focus of the aforementioned experimental approach is to determine the intensity ratios from specific Argon and atomic Oxygen spectral lines at various distances above the sample. Figuring the previously mentioned ratios will enable the accurate estimation of the recombination layer thickness as well as the recombination coefficient or efficiency of the sample material. The material of interest in this study is a ceramic, specifically Silicon Carbide. This ceramic is commonly applied as a coating on top of Reinforced Carbon-Carbon TPS, which is placed on locations that experience the highest temperatures during re-entry. Focus of the study shifted temporarily towards material science, specifically to create Silicon Carbide samples that could be resistively heated. SOL-GEL, a wet chemical procedure that was investigated and attempted as a method to produce a ceramic coating, was established as the most viable method via X-Ray diffraction.
Graduation Semester
2023-08
Type of Resource
Thesis
Copyright and License Information
Copyright 2023 Ali Soliman

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