(a) Neutron diffraction patterns from Zr-2.5Nb as a function of time while temperature is ramped; (b) and (c) Rietveld refinements at snapshots in the β and α + β phase fields, respectively.
Behavior of the normalized intensities of β-Zr reflections (a) and selected reflections (b) for 2 different heating ramps. The features at A,B,C,D are described in the text.
In situ laser scanning confocal microscopy on Zr-2.5Nb at given time and temperatures of the heating cycle.
Ratio between the Bragg reflectivities calculated by the dynamic and the kinematic theory of diffraction, respectively, as a function of crystal thickness normalized to extinction length (continuous line). The dots mark the experimental values of the first 7 reflections at the time of minimal reflectivity. Low-order reflections lie to the right and high order to the left of the distribution.
Time behavior of the β-200 Bragg reflectivity upon two different heating-cooling cycles (blue, pink). Overall linear plot (a) denoting the zero times for annihilation a and nucleation n studies in (b) and (c), respectively. The red lines are linear fits to the non-linear plot indicating the slopes nearby.
Quantitative numbers for reciprocal lattice vector Ghkl, Miller indices h,k,l, multiplicity m, extinction length Δ0, longitudinal and transverse Darwin widths, |ε| and Δθ, lattice spacing dhkl = 2π/Ghkl for the first 10 reflections in β Zr-2.5Nb in solid solution at 1273 K.
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