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dc.contributor.advisorGhosh, Tushar K.eng
dc.contributor.advisorLoyalka, Sudarshan Keng
dc.contributor.authorMokgalapa, Naphtali Maleselaeng
dc.date.issued2016eng
dc.date.submitted2016 Summereng
dc.descriptionDissertation supervisors: Tushar K. Ghosh and Sudarshan K. Loyalka.eng
dc.descriptionIncludes vita.eng
dc.description.abstractThe adhesion force and work of adhesion between aerosols (graphite and silver) generated in very high temperature reactors (VHTRs) and interacting with structural materials are presented. The method involves using Atomic Force Microscopy (AFM) in an air environment glove box.The adhesion force data were obtained for a silver particle and a graphite cluster separately interacting with structural materials including Haynes 230, Inconel 617, and Hastelloy X under four different surface conditions including as received and after oxidation for five, 10, and 15 minutes, respectively. It was found that the Johnson, Kendall, and Roberts model (JKR) enabled the prediction of values that were up to three orders of magnitude higher than the experimental data when silver interacted with structural materials. The difference in order of magnitude between experimental data and theory for graphite in particular varied between one and three. In contrast, the inclusion of surface roughness of the silver particle and surface features of structural materials in calculations produced results that were one order of magnitude higher than the experimental data. These comparisons serve to provide insight into the significant influence that surface roughness has on adhesion force. Data produced in this work may be important in understanding the adhesion of silver and reactor grade graphite aerosols to structural materials and can contribute to particle resuspension calculations.eng
dc.description.bibrefIncludes bibliographical references (pages 116-123).eng
dc.format.extent1 online resource (xxii, 130 pages) : illustrationseng
dc.identifier.merlinb118899521eng
dc.identifier.oclc990792435eng
dc.identifier.urihttps://hdl.handle.net/10355/57247
dc.identifier.urihttps://doi.org/10.32469/10355/57247eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.rightsOpenAccess.eng
dc.rights.licenseThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.eng
dc.subject.FASTGas cooled reactorseng
dc.subject.FASTAdhesioneng
dc.subject.FASTGraphiteeng
dc.subject.FASTSilvereng
dc.subject.FASTSteel, Structuraleng
dc.titleMeasurements of adhesion force between single particles and clusters interacting with some VHTR structural steelseng
dc.title.alternativeMeasurements of adhesion force between single particles and clusters interacting with some very high temperature reactors structural steelseng
dc.typeThesiseng
thesis.degree.disciplineNuclear engineering (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelDoctoraleng
thesis.degree.namePh. D.eng


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