Sota Takagi

Kinetic hindrance of phase transformations in dense MgSiO 3 polymorphs under shock compression

Equilibrium phase diagrams define the pressure-temperature stability fields of MgSiO 3 polymorphs, yet whether these phase transformations can proceed under shock compression remains poorly constrained. Here, we present in situ synchrotron x-ray diffraction (XRD) measurements of...

Ultrahigh flow strength in shocked nanopolycrystalline diamond

Extreme pressures and temperatures create conditions that allow even hard and brittle materials to flow plastically. Despite extensive research, the limits of flow strength under such conditions remain uncertain, and the mechanisms driving deformation at the relevant stresses are...