Atomic Scale Structure and Chemical Composition across Order-Disorder Interfaces
Hwang, J. Y.
Viswanathan, G. B.
Dimiduk, D. M.
Fraser, H. L.
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Publisher:American Physical Society
Citation:R. Srinivasan et al, "Atomic Scale Structure and Chemical Composition across Order-Disorder Interfaces," Physical Review Letters 102, no. 8 (2009), doi:10.1103/PhysRevLett.102.086101
Through a combination of aberration-corrected high-resolution scanning transmission electron microscopy and three-dimensional atom probe tomography, the true atomic-scale structure and change in chemical composition across the complex order-disorder interface in a metallic alloy has been determined. The study reveals the presence of two interfacial widths, one corresponding to an order-disorder transition, and the other to the compositional transition across the interface, raising fundamental questions regarding the definition of the interfacial width in such systems.