Results 121 to 130 of about 16,901 (160)

Phase stabilities of fcc Ti nanocrystals

Solid State Communications, 2004
A model for the equilibrium transition size and temperature between hcp and fcc structure of nanocrystals Ti has been established in terms of the effect of surface stress on the internal pressure of nanocrystals. It was found that as size and temperature decreased, the relative stability of fcc structure in comparison with hcp structure increased.
Z.P. Chen, Z. Wen, Q. Jiang
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The origin and the effect of the fcc phase in sintered HfNbTaTiZr

Materials Letters, 2021
Abstract The growing interest in preparing refractory high entropy alloys via powder metallurgy reveals significant sensitivity to impurities, influencing the phase composition and microstructure and, consequently, the mechanical properties. Mechanical alloying of commercial purity powders is a cost-effective way of material preparation leading to a ...
František Lukáč, Monika Vilémová, Mariana Klementová, Peter Minárik, Tomáš Chráska   +4 more
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Phase diagrams of FCC alloy films

Physica B: Condensed Matter, 2006
Abstract We have studied the order–disorder phase transitions of FCC alloy thin films in the (0 0 1) direction using the mean-field method. Surface field is used to describe the surface effects such as surface segregation. All the different types of the phase diagrams of alloy thin films under the surface field are calculated.
Jiangling Pan, Yanlin Xu, Jun Ni
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FCC–HCP phase boundary in lead

Solid State Communications, 2002
Abstract The pressure–temperature phase diagram of Pb was mapped from synchrotron X-ray diffraction data measured to 40 GPa and 800 K, in the region including the hexagonal-close-packed to face-centered cubic transformation; the corresponding p–T–V equations of state were fitted for both phases.
A. Kuznetsov, V. Dmitriev, L. Dubrovinsky, V. Prakapenka, H.-P. Weber   +4 more
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Martensitic phase transformation and lattice dynamics of fcc cobalt

Physical Review B, 1996
The phonon dispersion of the high-temperature fcc phase of pure cobalt has been measured by inelastic neutron scattering at 833 K. Transverse phonon branches were measured above and below the Martensitic hcp-fcc transformation in order to learn about an influence of lattice dynamics, if any.
, Strauss, , Frey, , Petry, , Trampenau, , Nicolaus, , Shapiro, , Bossy   +6 more
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Stability of fcc phase FeH to 137 GPa

American Mineralogist, 2020
Abstract We examined the crystal structure of FeHX (X~1) (FeH hereafter) at high pressure and temperature by X-ray diffraction up to 137 GPa. Results show that FeH adopts a face-centered cubic (fcc) structure at pressures of 43 to 137 GPa and temperatures of ~1000 to 2000 K.
Chie Kato, Kenji Ohta, Koichiro Umemoto   +2 more
exaly   +2 more sources

Is blue phase II fcc?

Physical Review Letters, 1987
On pense generalement que la phase bleue II (BP II) est une structure cubique simple. On demontre que la BP II dans le (+)p-[p-methoxybenzylidene) amino] cinnamate de methyl-2 butyle est cfc et on montre que c'est probablement vrai pour toutes les autres BP ...
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Ferromagnetic phases of bcc and fcc Fe, Co, and Ni

Physical Review B, 1986
The different magnetic phases of the bcc and fcc forms of Fe, Co, and Ni are studied by analyzing total-energy surfaces in moment-volume parameter space obtained from energy-band calculations using a local-spin-density approximation. The surfaces, found by calculating total energies while holding both the magnetic moment and the volume fixed, offer a ...
, Moruzzi, , Marcus, , Schwarz, , Mohn
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First-order phase transition in the fcc Heisenberg antiferromagnet

Physical Review B, 1989
The nature of the phase transition of the nearest-neighbor Heisenberg antiferromagnet on a fcc lattice is studied by means of Monte Carlo simulations. Using a finite-size scaling, the transition is shown to be unambiguously of first order. Evidence for a first-order transition in the corresponding XY model is also presented.
, Diep, , Kawamura
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Phase transition in type-1 fcc Ising antiferromagnets

Physical Review B, 1989
We have used Monte Carlo simulations to investigate an Ising system on the fcc lattice, with antiferromagnetic first-neighbor interactions (${J}_{1}$) and ferromagnetic second-neighbor interactions (${J}_{2}$) (type-1 antiferromagnet). Our results indicate that the transition remains first order for the ratio ${J}_{2}$/\ensuremath{\Vert}${J}_{1 ...
, Oitmaa, , Fernandez
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