Phase stability in ti/bcc multilayered thin films

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dc.contributor Mankey, Gary J.
dc.contributor Kotru, Sushma
dc.contributor Li, Lin
dc.contributor Foley, Robin D.
dc.contributor Thompson, Gregory B.
dc.contributor.advisor Thompson, Gregory B. Wan, Li
dc.contributor.other University of Alabama Tuscaloosa 2017-04-26T14:25:29Z 2017-04-26T14:25:29Z 2016
dc.identifier.other u0015_0000001_0002312
dc.identifier.other Wan_alatus_0004D_12648
dc.description Electronic Thesis or Dissertation en_US
dc.description.abstract Materials structures with large surface area-to-volume ratios can exhibit size dependent physical and chemical properties that are different than their bulk form. These changes are often related to the material adopting a different crystallographic phase. Often these phase transformations are serendipitously observed with the criteria for their stability difficult to ascertain. This work elucidates the underpinnings of phase stability behavior in the nanoscale regime by providing a systematic study using Ti/bcc multilayered thin film architectures. The influences of lattice misfit, layer thickness, composition and chemical intermixing on the phase stability are determined. In situ thin film growth stresses of these materials are measured and correlated to the interfacial stress evolution to help rationalize the stability behavior. X-ray and electron diffraction have been employed to determine the phase with atom probe tomography used to characterize the chemical compositions within the materials and across the interfaces. This work will delineate how intrinsic film stress drives compositional intermixing across such interfaces which can thermodynamically promote phase transformations. en_US
dc.format.extent 174 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated. en_US
dc.subject Materials science
dc.title Phase stability in ti/bcc multilayered thin films en_US
dc.type thesis
dc.type text University of Alabama. Department of Metallurgical and Materials Engineering Metallurgical/Materials Engineering The University of Alabama doctoral Ph.D.

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