Development and characterization of nanostructured cermet coatings produced by co-electrodeposition

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dc.contributor.advisorKhan, Tahir
dc.contributor.authorFarrokhzad, Mohammad Ali
dc.date.accessioned2017-12-18T22:34:08Z
dc.date.available2017-12-18T22:34:08Z
dc.date.issued2012
dc.descriptionBibliography: p. 318-330en
dc.descriptionSome pages are in colour.en
dc.description.abstractNanostructured cermet (ceramic-metallic) coatings are a group of materials that combine properties possessed by ceramics, such as oxidation resistance and high hardness, and the properties of metals such as strength and ductility. These coatings consist of nano-sized metal-oxide particles (i.e. Ah03) dispersed into a corrosion resistant metal matrix such as nickel. Cermet coatings have been used in many industrial applications such as cutting tools and jet engines where high temperature and erosion resistance performance are required. However, despite the promising properties, the lack of experimental data and theories on high temperature oxidation and mechanical properties of cermet coatings have restricted their full potential to be used in technologies for oil sand production such as In-Situ Combustion (ISC). In this study, the structure of cermet coatings was investigated to identify the characteristics that give rise to oxidation performance and wear resistance properties of cermet coatings. The experimental oxidation results on the single-component oxide cermet coatings showed that when Ah03 and Ti02 were combined in the electrolyte, the new combination can improve oxidation performance (less mass gain) as compared to a pure Ni coating. Based on the oxidation and micro-hardness results, a new group of nanostructured cermet coatings ( double-component oxides) was developed and investigated using long term oxidation tests, thermo-gravimetric analysis in mixed gas, thermal cycling, micro-hardness and abrasive wear tests. The mechanical analysis of the newly developed coatings showed improved resistance against wear and thermal cycling compared to single-component oxide cermet and pure Ni coatings. Furthermore, some new theoretical analysis were also put forward that aims at a new explanation of high temperature oxidation for cermet coatings.
dc.format.extentxx, 368 leaves : ill. ; 30 cm.en
dc.identifier.citationFarrokhzad, M. A. (2012). Development and characterization of nanostructured cermet coatings produced by co-electrodeposition (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/4886en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/4886
dc.identifier.urihttp://hdl.handle.net/1880/105887
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.titleDevelopment and characterization of nanostructured cermet coatings produced by co-electrodeposition
dc.typedoctoral thesis
thesis.degree.disciplineMechanical and Manufacturing Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 2107 627942977
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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