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dc.contributor.advisor Barrera, Enrique V.
dc.creatorOlivas, John Daniel
dc.date.accessioned 2009-06-04T00:46:58Z
dc.date.available 2009-06-04T00:46:58Z
dc.date.issued 1996
dc.identifier.urihttps://hdl.handle.net/1911/16985
dc.description.abstract The purpose of the present study was to analyze the contamination which resulted from processing steps applied to substrate surfaces for the metal coating process known as plasma spray metal deposition. Additionally, the surface effects resulting from different solvent cleaning steps applied to a Ni based alloy were investigated in detail using incident, angle resolved and thermal desorption x-ray photoelectron spectroscopic methods. In particular, the study focused on contaminant O and C species interactions with the polycrystalline substrate prior to coating deposition. Differences in XPS features were noted between the various solvents used. Each solvent resulted in evaporation and ambient adsorption behavior which produced characteristic contaminants. Combining conventional desorption theory and surface spectroscopic techniques, a method of determining desorption behavior which was independent of weight measurements was developed. By comparing ambient O species to substrate oxides, changes in adsorbate coverage were estimated for the denuding surfaces. Experimental values for desorption behavior and relative desorption energetics were determined for ambient air on a polycrystalline substrate resulting from solvent/substrate interactions. Differences were discriminated between preparation methods and shown to vary as a function of solvent used. The nature of a surface with contamination was explained on this basis.
dc.format.extent 195 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectEngineering
Materials science
Metallurgy
dc.title Surface study of process contamination of plasma spray metal deposition process
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Materials Science
thesis.degree.discipline Engineering
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.identifier.citation Olivas, John Daniel. "Surface study of process contamination of plasma spray metal deposition process." (1996) Diss., Rice University. https://hdl.handle.net/1911/16985.


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