The effects of annealing on phase transformation in platinum-molybdenum coatings

Simple item page
dc.contributor.advisorBlumenthal, Men_ZA
dc.contributor.advisorComrie, Craigen_ZA
dc.contributor.authorKhumalo, Zakhelumuzi Mesulien_ZA
dc.date.accessioned2015-01-01T13:13:51Z
dc.date.available2015-01-01T13:13:51Z
dc.date.issued2012en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThe thermodynamic study of platinum binary systems has both fundamental and applied aspects. It is due to the fact that the formation of ordered phases increases the strength and surface hardness and could also have an impact on surface activity and chemical properties. The changes in mechanical, physical and chemical properties could be of significant importance in enhancing the performance of platinum-based systems in their respective applications, such as gas sensors, catalyst, fuel cells and superconductors. In this investigation, the phase transformation in Pt-Mo coated systems induced by thermal annealing was studied by X-ray diffraction, scanning electron microscope, transmission electron microscope, energy dispersive X-ray emission and Rutherford backscattering spectrometry. The phase analysis showed the presence of several intermetalic phases, Pt2Mo, PtMo and Pt2Mo3 which were observed to nucleate in sequence when the annealing time and temperature were extended. RBS analysis showed an increase in coating thickness after annealing which has been attributed to the formation of the Pt-Mo phases.en_ZA
dc.identifier.apacitationKhumalo, Z. M. (2012). <i>The effects of annealing on phase transformation in platinum-molybdenum coatings</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Physics. Retrieved from http://hdl.handle.net/11427/10916en_ZA
dc.identifier.chicagocitationKhumalo, Zakhelumuzi Mesuli. <i>"The effects of annealing on phase transformation in platinum-molybdenum coatings."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Physics, 2012. http://hdl.handle.net/11427/10916en_ZA
dc.identifier.citationKhumalo, Z. 2012. The effects of annealing on phase transformation in platinum-molybdenum coatings. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Khumalo, Zakhelumuzi Mesuli AB - The thermodynamic study of platinum binary systems has both fundamental and applied aspects. It is due to the fact that the formation of ordered phases increases the strength and surface hardness and could also have an impact on surface activity and chemical properties. The changes in mechanical, physical and chemical properties could be of significant importance in enhancing the performance of platinum-based systems in their respective applications, such as gas sensors, catalyst, fuel cells and superconductors. In this investigation, the phase transformation in Pt-Mo coated systems induced by thermal annealing was studied by X-ray diffraction, scanning electron microscope, transmission electron microscope, energy dispersive X-ray emission and Rutherford backscattering spectrometry. The phase analysis showed the presence of several intermetalic phases, Pt2Mo, PtMo and Pt2Mo3 which were observed to nucleate in sequence when the annealing time and temperature were extended. RBS analysis showed an increase in coating thickness after annealing which has been attributed to the formation of the Pt-Mo phases. DA - 2012 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2012 T1 - The effects of annealing on phase transformation in platinum-molybdenum coatings TI - The effects of annealing on phase transformation in platinum-molybdenum coatings UR - http://hdl.handle.net/11427/10916 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/10916
dc.identifier.vancouvercitationKhumalo ZM. The effects of annealing on phase transformation in platinum-molybdenum coatings. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Physics, 2012 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/10916en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Physicsen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherPhysicsen_ZA
dc.titleThe effects of annealing on phase transformation in platinum-molybdenum coatingsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_2012_khumalo_z_m.pdf
Size:
4.38 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters