Dislocation density and Burgers vector population in fiber-textured Ni thin films determined by high-resolution X-ray line profile analysis

Abstract

Nanocrystalline Ni thin films have been produced by direct current electrodeposition with different additives and current density in order to obtain h100i, h111i and h211i major fiber textures. The dislocation density, the Burgers vector population and the coherently scattering domain size distribution are determined by high-resolution X-ray diffraction line profile analysis. The substructure parameters are correlated with the strength of the films by using the combined Taylor and Hall-Petch relations. The convolutional multiple whole profile method is used to obtain the substructure parameters in the different coexisting texture components. A strong variation of the dislocation density is observed as a function of the deposition conditions.

Periodic order and defects in Ni-based inverse opal-like crystals on the mesoscopic and atomic scale

“…The IOLC samples contain dislocations with the density higher than 1 × 10 15 m −2 as well as stacking faults of the atomic structure. The dislocation density is high but in a reasonable agreement with the values reported for powders and nanocrystalline thin films [33,49]. The concentration of twin stacking faults (∼0.01) is higher than that for deformation-type stacking faults (0.003 ± 0.002), that is in agreement with the results of [33,50].…”

Elastic Behavior of Nb2O5/Al2O3 Core–Shell Nanowires in Terms of Short-Range-Order Structures

“…These unique properties may arise from the NWs’ large surface area to volume ratio where surface effects, as well as microstructure and spatial confinement of atoms, are crucial/dominant. For example, in terms of their mechanical behavior, they significantly differ from their two- or three-dimensional counterparts. − The addition of a shell material can further tune the performance and functionality of homogeneous NWs. Such heterostructured NWs, that is, core–shell NWs often possess different chemical and physical properties, which may arise from the difference in the strain at the core–shell interface …”

Nonlinear elastic aspects of multi-component iron oxide core–shell nanowires by means of atom probe tomography, analytical microscopy, and nonlinear mechanics

“…[43][44][45] As a consequence, probably due to their extremely small physical size and the high surface-to-volume ratio, the unique physical properties of the NWs have always indicated a signicant difference from that of their 2D (thin lm), or 3D (bulk) counterparts irrespective to the applied experimental methods or computational simulation. [46][47][48][49][50][51][52][53][54][55][56][57][58] In many modern applications that involve larger strains, the deformation becomes inherently nonlinear (geometrical and/or mechanical). [59][60][61] Therefore, to describe complex physical aspects of these materials, appropriate mechanical models are needed while they can open novel pathways to potential applications.…”