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Showing 1 to 15 of 15 for “"body-centered cubic (bcc)"”.
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Synthesis, X-ray characterization, structural and magnetic studies of a new class of iso-structural BiMO₃ compounds
… part. These compounds all crystallize in the body centered cubic (BCC) structure with a~10.2Å. Single crystal Precession and Weissenberg photographs confirmed the BCC structure. In part three, the results of the magnetic studies on BiCoO₃ and biAl.₉FE.₁ are presented. The magnetic data for …
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Interface-Tracking by the Face-Offsetting Method for Martensitic Transformation Simulations
… special type of martensitic transformation) in a body-centered cubic (BCC) crystal within the Abeyaratne-Knowles continuum thermomechanical framework. Geometric singularities and topological changes associated with microstructural evolution pose significant numerical challenges. We address such …
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First Principles-Based Interatomic Potentials for Modeling the Body-Centered Cubic Metals V, Nb, Ta, Mo, and W
… method (MEAM) interatomic potentials for the body-centered cubic (bcc) metals V, Nb, Ta, Mo, and W from data generated by first-principles density-functional theory (DFT) calculations. Comparisons of a wide range of computed materials properties to DFT calculations and experimental data test …
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Understanding the origins of metastability in thin film growth; tantalum and the early group VB-VIB metals
… mechanism is studied for Ta and the neighboring body centered cubic (bcc) transition metals in Groups 5 and 6 of the Periodic Table, resulting in the prediction of hypothetical body centered tetragonal (bct) and face centered cubic (fcc) phases for all the studied metals at c/a ratios greater …
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Mean-Field Parameter Study of Radiation-Induced Segregation in a Binary Metal Alloy
… designs. A mean-field study is conducted on a body-centered cubic (BCC) A-B binary metal alloy system. The performance of the simulated metal system is measured by assessing the degree of segregation that occurs at the grain boundary (GB) in the center of the one-dimensional simulation box. …
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Analysis of hydrodynamic drag forces acting on suspended fine particle in porous media
… compact granular porous media – ordered (simple cubic (SC), body-centered cubic (BCC), face-centered cubic (FCC)) and monodisperse disordered packs are reported and discussed. It is concluded that, overall, the trends of the drag force distribution in the face centered cubic (FCC) pack are the …
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Green synthesis of Europium (III) Oxide nanoparticles using Hibiscus sabdariffa flower extract
… nm. The XRD results confirmed the characteristic body centered cubic (BCC) structure of Eu2O3 nanoparticles and the UV-Vis proved that Eu2O3 absorbs in a wide range of electromagnetic wave from ultraviolet region. The luminescence properties of such cubic were characterized by an intense red …
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The Smallest Base and Precious Metal Deposits in the World: Vapor Transport and deposition of Co-Cu-Sn-Ag alloys in vesicles
… amounts of Co and Fe (≈5 wt% each) indexes as body-centered cubic (BCC). The presence of alloys suggests metal transport as complexes in a vapor phase before being reduced to native metals. Our current model for the origin of the alloys suggests that the metals are transported to vesicles as …
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First Principles Method for Complex Cement Structure and High Entropy Alloys
… properties of HEAs. Large supercells of body centered cubic (bcc), face centered cubic (fcc), and rock-salt fcc HEAs are used to examine their chemical defect such as local lattice distortion (LLD). One part of this work is to investigate TiNbTaZrMo HEAs as a key model compare its …
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Ion assisted magnetron sputtering of tantalum thin film deposition and characterization
… phases: a stable [alpha]-phase with a body centered cubic (bcc) lattice structure and a metastable [beta]-phase with a tetragonal lattice structure. The tough and ductile [alpha]-phase Ta is desired in most industrial applications, such as diffusion barrier layers in integrated …
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Atomistic Modeling of Defect Energetics and Kinetics at Interfaces and Surfaces in Metals and Alloys
… (h k l) crystallographic orientation in both body-centered-cubic (BCC) and face-centered-cubic (FCC) pure metals, using only two or three low-index (e.g., (100), (110), (111)) surface energies as input. This analytical formula is validated against 4357 independent single element surface …
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Modeling of twinning as a deformation mechanism in iron (bcc) crystals and iron-based alloys
… expression for twin nucleation stress in bcc metals considering GPFE (generalized planar fault energy) and the dislocations bounding the twin nucleus. We minimize the total energy to predict the twinning stress relying only on parameters that are obtained through atomistic calculations, …
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Thermodynamics of Micellar Lyotropic Liquid Crystals
… LLC sphere packings include high-symmetry body-centered cubic (BCC), face-centered cubic (FCC), and hexagonally closest-packed (HCP) structures. Recently, a giant tetragonal σ phase containing 30 micelles of five different sizes was discovered in the aqueous LLC self-assembly of dianionic …
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Development of cost effective materials for use as hydrogen purification membranes
… to establish the full potential of the group-V body centered cubic (BCC) metals for use as hydrogen permeable membranes. V, Nb, and Ta all have significantly higher hydrogen permeability than Pd, but negligible ability to dissociate H2 into atomic hydrogen, and therefore require the application …
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Underlying deformation behavior of medium/high entropy alloys using advanced electron imaging and diffraction
… The first system is the MEA CrCoNi with the face-centered cubic (FCC) crystal structure. Under tensile loading, CrCoNi develops extensive planar faults that includes stacking faults, deformation twins, and stress-induced local HCP transformation. For this system, We compare the samples of as-cast …