Speaker
Holý V.
(Department of Condensed Matter Physics, Charles University, Prague)
Description
Nanoparticles of hexagonal phase in bcc-Ti(Mo) single crystals ( phase) occur due to a
diffusionless athermal to transformation and they grow during follow-up ageing at
elevated temperatures, while the alloying atoms (Mo in our case) are expelled from the
nanoparticle volumes. We used anomalous x-ray diffraction for the study of local chemical
composition of growing particles and we found that a Mo-rich shell at the particle/matrix
interface is created during the particle growth. Moreover, the expelled Mo atoms create a
cloud with higher Mo density around each particle and its Mo concentration profile was
studied by anomalous x-ray diffraction and small-angle scattering.
