منابع مشابه
Prediction and hydrogen acceleration of ordering in iron-vanadium alloys.
Ab initio calculations of binary metallic systems often predict ordered compounds in contrast to empirical reports of solid solutions or disordered phases. These discrepancies are usually attributed to slow kinetics that retains metastable structures at low temperatures. The Fe-V system is an example of this phenomenon, in which we predict two ordered stable ground states, Fe3V and FeV3, wherea...
متن کاملOrbital ordering and structural distortions in vanadium spinels
Materials with the spinel crystal structure exhibit a diverse range of ground states and properties. These result from the interplay of spin, charge and orbital degrees of freedom over the geometrically frustrated pyrochlore sublattice. In certain spinels the interaction of ordered orbitals induces a structural distortion, due to the formation of clusters of directly bonded atoms called orbital...
متن کاملStrongly non-Arrhenius self-interstitial diffusion in vanadium
Luis A. Zepeda-Ruiz,1,2,* Jörg Rottler,1 Seungwu Han,1,† Graeme J. Ackland,3 Roberto Car,1 and David J. Srolovitz1 1Princeton Institute for the Science and Technology of Materials (PRISM), Princeton University, Princeton, New Jersey 08544, USA 2Chemistry and Materials Science Directorate, Lawrence Livermore National Laboratory, P.O. Box 808, L-371, Livermore, California 94550, USA 3School of Ph...
متن کاملThe Fe-V Cofactor of Vanadium Nitrogenase Contains an Interstitial Carbon Atom.
The first direct evidence is provided for the presence of an interstitial carbide in the Fe-V cofactor of Azotobacter vinelandii vanadium nitrogenase. As for our identification of the central carbide in the Fe-Mo cofactor, we employed Fe Kβ valence-to-core X-ray emission spectroscopy and density functional theory calculations, and herein report the highly similar spectra of both variants of the...
متن کاملStress Induced Ordering Due to Interstitial Elements in Nb and Ta by Frequency Analysis
It is well known that the interstitial elements present in solid solution in metals interact with the matrix by a relaxation process known as stress induced ordering. Traditionally this relaxation process is observed in the internal friction measurements. It is a common practice that researchers present the results of the frequency together with internal friction without giving any analysis. In...
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ژورنال
عنوان ژورنال: Acta Metallurgica
سال: 1966
ISSN: 0001-6160
DOI: 10.1016/0001-6160(66)90187-8