<i>In Situ</i> TEM Observation of Structural Changes in Rapidly Solidified bcc Solid-Solution Phase in Ti&ndash;Cr Alloy Focusing on Spontaneous Vitrification (SV)

Abstract

Changes in the structure of the rapidly solidified body-centered-cubic (bcc) solid-solution phase in TiCr alloy were investigated in order to determine whether or not the unique heat-induced amorphization (i.e., SV) actually occurs. Annealing-induced amorphization of the single solidsolution phase was not observed during either ex situ isothermal annealing at 873 K or in situ annealing experiments in HVEM. The previously reported SV may not correspond to the formation of an amorphous phase but could actually be due to the formation of a finely grained polycrystalline structure during the decomposition of the bcc solid-solution phase.

Atomic Structure of Heterophase Junction from Theoretical Prediction

“…New experimental techniques have been applied to characterize the interface structure, including in situ heat TEM [21][22][23][24], in situ X-ray diffraction [25][26][27] and in situ Raman spectrum [28,29]. In addition, recent years have also seen the efforts using computational simulations to optimize the solid-solid interface.…”