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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Recent Developments in Biological, Structural and Functional Thin Films and Coatings
Presentation Title Influence of Interfacial Structure on the Phase Stability and Growth Stress in Cu/Nb Multilayered Films
Author(s) Qianying Guo, Li Wan, Richard L. Martens, Gregory B. Thompson
On-Site Speaker (Planned) Qianying Guo
Abstract Scope As layer thickness were reduced, a series of phase transformation have been noted to occur in Cu/Nb multilayers. Using HRTEM the evolution of the interface from incoherent-to-semicoherent-to-coherent has been characterized and related to the interfacial energy reduction that drives these transformations. These transformations have also been related to their real-time measured intrinsic growth stresses which revealed a notable reduction in the compressive stress with each transformation. When equal thicknesses of < 1 nm where deposited, each layer vitrified due to the positive enthalpy of mixing. These findings will presented in a thermodynamic framework where TEM, atom probe, and stress evolution characterization have been correlated together to provide new insights into the mechanisms of structural stability of crystalline phases at the nanoscale.
Proceedings Inclusion? Planned: A print-only volume


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