Investigation of coherency stress-induced phase separation in AlN/AlxGa1−xN superlattices grown on sapphire substrates

Suppression of compositional non-uniformity in AlxGa1−xN layers by using AlN/AlxGa1−xN superlattices through adjusting stresses in AlN/AlxGa1−xN layers is demonstrated.

Three-dimensional phase evolution and stress-induced non-uniform Li intercalation behavior in lithium iron phosphate

Lithium iron phosphate (LiFePO4) olivine cathode displays non-uniform delithiation front induced by coherency stress between LiFePO4 and FePO4 phases.

Lattice Misfit of High Refractory Ruthenium Containing Nickel-Base Superalloys

The influence of Ru, Co, Mo and W on the lattice misfit of eight highly alloyed Re containing single crystal nickel-base superalloys was investigated. High resolution X-ray diffraction (XRD) was used to relate the elemental partitioning behavior and the Vegard coefficients of the elements under investigation to the measured lattice parameter of the  and  phase. The residual chemical segregation and especially the coherency stress-induced tetragonal distortion of the  matrix lattice in the high Mo containing alloys results in the observation of two different lattice parameters for the  matrix phase. This leads to three overlapping, but clearly distinguishable {002} X-ray reflections.