Abstract
In order to enhance the thermal stability of nanomaterials, it is important to understand phase transformations at the nanoscale in high detail. In this study, the phase transformations occurring in the nanocrystalline W–Cr system were investigated using nanometallic multilayers to shift the kinetics of nucleation and to increase the diffusivities of W and Cr. The initial metastable state of the multilayers was tailored to favor the formation of solutions rich in W. In addition, the higher diffusivities in the system made it possible to observe the nucleation of the W3Cr intermetallic at 1000 °C, a temperature lower than that reported in previous studies. In this manuscript, the use of nanometallic multilayers is proposed as an approach to modify the thermal evolution of a nanocrystalline systems and study phase transformations at the nanoscale.
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