Phase transition and twinning in polycrystals probed by <i>in situ</i> high temperature 3D reciprocal space mapping

Polycrystalline materials exhibit physical properties that are driven by both the interatomic crystallographic structure as well nature and density of structural defects. Crystallographic evolutions phase transitions associated twinning process can be observed in situ three-dimensional (3D) using monochromatic synchrotron radiation at very high temperatures (over 1000 °C). This paper focuses on continuous measurements 3D-reciprocal space maps high-resolution x-ray diffraction a function temperature along transition occurring between 1200 °C room temperature. These precision allow observing reciprocal node splitting evolution diffuse scattering signal around The capability this experimental method is illustrated direct 3D due to recorded dense pure zirconia polycrystals.