Starting from basic observations concerning commensurate structures, a simple explanation is given for the existence of energetically stable states of an fcc(111) adsorbate on a bcc(110) substrate, as a function of the mismatch and relative orientation of the two lattices. Numerical simulations are ...
Chromium has a BCC crystal structure, an atomic radius of 0.125 nm, and an atomic weight of 52.00 g/mol. Compute its theoretical density. Determine the interplanar spacing in Angstroms for the (-2 2 -1) planes in a BCC crystalline if the atomic radius is 0.1...
An atomic transition model of a face-centered cubic (fcc) crystal to a primitive hexagonal ω and body-centered cubic (bcc) structures has been crystallographically built. The fcc structure can transform into the ω structure through a local shuffling or displacement of atoms about 0.4014 Å in...
1) What is the planar density for the (1 1 0) plane in chromium. Chromium is BCC and has an atomic radius of 0.125 nm. 2) Calculate the linear atomic density along the [1 1 1] direction for FCC Atomic The density of thorium, which has the FCC structure, i...
Grain-boundary sliding and separation in poly crystalline metals: application to nanocrystalline fee metals In order to model the effects of grain boundaries in polycrystalline materials we have coupled a crystal-plasticity model for the grain interiors with a ne... J Y.,Wei,L.,... - 《Journal...
The relevance of the mobility of edge components in determining the plastic response of both FCC Al and BCC Fe at different temperatures is discussed, which leads to developing a mechanistic explanation of the underlying mechanisms leading to the experimental behaviour using Dynamic Discrete Dislocation...
It has recently been suggested that carbon nanocrystals obtained by chemical vapor deposition with a gaseous precursor containing CH 4 and H 2, may include hydrogen atoms in the carbon lattice, forming solid fcc- and bcc-CH x phases. In this work, we evaluate the structural stability of five...
Thebccphaseagainhasasignificantlower Curietemperature553K thanitsfcccounterpart872K . Herethemagneticmomentsarealmostthesame1.03 B for bccand1.07 B forfcc .Asyetnotheoreticalexplanationfor thedifferentCurietemperatureshasbeenoffered. First-principlescalculationsofthemagneticmoments haveyieldedthesamevaluesasfound...
Cu-Nb layered nanocomposite system can be considered as a prototype system to investigate stability of the fcc-bcc semicoherent metallic interfaces. Theoretical simulations based on density functional theory have been performed in order to investigate th
and shape the heat profile emanating from the heat (light) source on the recording head. Each layer may be formed by different materials with different properties. For example, a layer may be amorphous (non-crystalline) or crystalline, may have a face-centered cubic, body-centered cubic (bcc...