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dc.contributor.advisorBreiby, Dag Wernernb_NO
dc.contributor.authorKongsmo, Rakelnb_NO
dc.date.accessioned2014-12-19T13:18:43Z
dc.date.available2014-12-19T13:18:43Z
dc.date.created2013-09-09nb_NO
dc.date.issued2013nb_NO
dc.identifier646882nb_NO
dc.identifierntnudaim:9087nb_NO
dc.identifier.urihttp://hdl.handle.net/11250/246987
dc.description.abstractWe have performed compression experiments on both metal-coated and uncoated resorcinol-formaldehyde polymer microspheres by a experimental setup developed in-house. Through images obtained from optical microscopy, the experiments yield radius of the contact area between sphere and compressing plates, as well as on-axis compression and lateral expansion of the microspheres.Based on Tatara's solution to the sphere-contact problem, we have estimated the Poisson's ratio of uncoated particles to 0.314$\pm$0.0195, which corresponds well to existing literature. As the metal-coated particles are composite, it is not straightforward to find their Poisson's ratio. Uncertainties in the experiments for these particles are suggested to be mainly caused by delamination of the coating during compression and plastic deformation of the coating.The experimental setup proves to be excellent for determining amount of compression needed to fracture the spheres, where the yield point of the coated microspheres was found to be at 16$\%\pm$1.1$\%$ compression. The setup also appears to be good for direct observation of crack initiation and propagation, as one gains visualisation of the sphere surface through the optical microscope.nb_NO
dc.languageengnb_NO
dc.publisherInstitutt for fysikknb_NO
dc.titleMicroscopical Characterization of Metal-Coated Polymer Microspheres under Mechanical Compressionnb_NO
dc.typeMaster thesisnb_NO
dc.source.pagenumber86nb_NO
dc.contributor.departmentNorges teknisk-naturvitenskapelige universitet, Fakultet for naturvitenskap og teknologi, Institutt for fysikknb_NO


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