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Material Characterization of Electrodeposited Copper-Nickel Nanolaminated Alloy by SEM, EDS, and XRD

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dc.contributor.advisor Flinn, Brian en_US Wang, Irene en_US 2012-09-13T17:36:05Z 2012-09-13 2012 en_US
dc.identifier.other Wang_washington_0250O_10663.pdf en_US
dc.description Thesis (Master's)--University of Washington, 2012 en_US
dc.description.abstract Electrodeposited nanolaminated copper-nickel alloys (Cu-Ni) exhibit excellent mechanical properties due to their modulated structure and nanocrystalline microstructure. X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy were used to characterize the composition, grain size, phases, and laminate structure of a nanolaminated deposit to explore structure-process-property relationships. The processing method of interest was pulse current electrodeposition of Cu-Ni a rotating disk electrode (RDE) with increased rotation speed during deposition of Cu-rich layers. Although copper content was enhanced in this way, it also caused macroscopic swirls in the deposit's surface, which were reflected microstructurally as Cu-rich streaks, non-planar layers, and other inhomogeneous morphology in the nanolaminate coating. Bulk composition of the nanolaminate was calculated from XRD spectra as being over 67wt%Ni overall, with over 91wt% Ni in Ni-rich layers and over 43wt% Ni in Cu-rich layers. EDS data of the same deposit differed significantly from these values, suggesting an overall composition closer to 55 wt% Ni, with a Ni-rich layer composition of 81 wt% Ni and 8.4 wt% Ni in the Cu-rich layers. Grain sizes of 15.8-22.3 nm were calculated for the nanolaminated deposit compared to 13-19 nm grains in a monolithic Ni-rich deposit of Cu-Ni. en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.rights Copyright is held by the individual authors. en_US
dc.subject characterization; Cu-Ni; EDS; nanolaminate; SEM; XRD en_US
dc.subject.other Materials Science en_US
dc.subject.other Engineering en_US
dc.subject.other Materials science and engineering en_US
dc.title Material Characterization of Electrodeposited Copper-Nickel Nanolaminated Alloy by SEM, EDS, and XRD en_US
dc.type Thesis en_US
dc.embargo.terms Restrict to UW for 2 years -- then make Open Access en_US
dc.embargo.lift 2014-09-03T17:36:05Z

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