A Multiscale Model of First and Second Order Phase Transformations with Application to SMA Single Crystals

2008 ◽  
Vol 7 (1) ◽  
pp. 197-213 ◽  
Author(s):  
Vesselin Stoilov
Keyword(s):  
Phase Transformations ◽  
Single Crystals ◽  
Multiscale Model ◽  
Second Order

scholarly journals Internal melt figures in ice by rapid adiabatic compression

1994 ◽  
Vol 40 (134) ◽  
pp. 132-134
Author(s):  
R.E. Gagnon ◽  
C. Tulk ◽  
H. Kiefte
Keyword(s):  
Phase Transformations ◽  
Grain Boundaries ◽  
Single Crystals ◽  
Adiabatic Compression ◽  
Air Bubbles ◽  
Water Ice ◽  
Deep Focus ◽  
And Behavior ◽  
First Time

AbstractSingle crystals and bicrystals of water ice have been adiabatically pressurized to produce, and clearly illustrate, two types of internal melt figures: (1) dendritic figures that grow from nucleation imperfections on the specimen’s surface, or from air bubbles at grain boundaries, into the ice as pressure is elevated; and (2) compression melt fractures, flat liquid-filled disks, that nucleate at imperfections in the crystal and grow with the application of pressure eventually to sprout dendritic fingers at the periphery. The transparency of the ice permitted visualization of the growth and behavior of the figures, and this could be an important tool in understanding the role of phase transformations in deep-focus earthquakes. Correlation between figure size and pressure is noted for the first time.

Pulsed laser-induced phase transformations in CdTe single crystals

2005 ◽  
Vol 248 (1-4) ◽  
pp. 259-263 ◽  
Author(s):  
E. Gatskevich ◽  
G. Ivlev ◽  
P. Přikryl ◽  
R. Černý ◽  
V. Cháb ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Single Crystals ◽  
Pulsed Laser

Phase transformations, anisotropic pyroelectric energy harvesting and electrocaloric properties of (Pb,La)(Zr,Sn,Ti)O3 single crystals

2017 ◽  
Vol 19 (21) ◽  
pp. 13534-13546 ◽  
Author(s):  
Fangping Zhuo ◽  
Qiang Li ◽  
Jinghan Gao ◽  
Qingfeng Yan ◽  
Yiling Zhang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Energy Harvesting ◽  
Phase Transformations ◽  
Single Crystals ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Electrical Energy ◽  
Flux Method

(Pb,La)(Zr,Sn,Ti)O3 single crystals are grown via the flux method. The structural phase transition, thermal–electrical energy harvesting and electrocaloric properties of the PLZST crystals with [100], [110], and [111] crystallographic directions are studied systematically.

Phase transformations and magnetic properties of MnAlC single crystals

1985 ◽  
Vol 88 (2) ◽  
pp. 587-594 ◽  
Author(s):  
M. A. Uimin ◽  
A. E. Ermakov ◽  
O. B. Andreeva ◽  
E. I. Teitel ◽  
V. M. Gundyrev
Keyword(s):  
Magnetic Properties ◽  
Phase Transformations ◽  
Single Crystals

Phase-Dield Simulation of Rhombohedral and Tetragonal Phases in Ferroelectric Single Crystals

Aerospace ◽  
2006 ◽  
Author(s):  
T. Liu ◽  
C. S. Lynch
Keyword(s):  
Free Energy ◽  
Phase Transformations ◽  
Single Crystals ◽  
Electric Fields ◽  
Tetragonal Phase ◽  
Ferroelectric Materials ◽  
Integration Scheme ◽  
Ferroelectric Crystal ◽  
Domain Structures ◽  
Tdgl Equation

Ferroelectric materials exhibit spontaneous polarization and domain structures below the Curie temperature. In this work the phase field approach has been used to simulate phase transformations and the formation of ferroelectric domain structures. The evolution of phases and domain structures was simulated in ferroelectric single crystals by solving the time dependent Ginzburg-Landau (TDGL) equation with polarization as the order parameter. In the TDGL equation the free energy of a ferroelectric crystal is written as a function of polarization and applied fields. Change of temperature as well as application of stress and electric fields leads to change of the free energy and evolution of phase states and domain structures. In this work the finite difference method was implemented for the spatial description of the polarization and the temporal evolution of polarization field was computed by solving the TDGL equation with an explicit time integration scheme. Cubic to tetragonal, cubic to rhombohedral and rhombohedral to tetragonal phase transformations were modeled, and the formation of domain structures was simulated. Field induced polarization switching and rhombohedral to tetragonal phase transition were simulated.

SECOND ORDER NUCLEAR QUADRUPOLE EFFECTS IN SINGLE CRYSTALS: PART I. THEORETICAL

1953 ◽  
Vol 31 (5) ◽  
pp. 820-836 ◽  
Author(s):  
G. M. Volkoff
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Single Crystals ◽  
Electric Quadrupole ◽  
Second Order ◽  
Order Effects ◽  
Axially Symmetric ◽  
Crystalline Electric Field ◽  
Resonance Frequencies ◽  
Principal Axes

The dependence of electric quadrupole splitting of nuclear magnetic resonance absorption lines in single crystals on crystal orientation in an external magnetic field is investigated theoretically following earlier work of Pound, of Volkoff, Petch, and Smellie, and of Bersohn. Explicit formulae are given, applicable to non axially symmetric crystalline electric field gradients (η ≠ 0), and valid up to terms of the second order in the quadrupole coupling constant [Formula: see text], for the dependence of the absorption frequencies on the angle of rotation of the crystal about any arbitrary axis perpendicular to the magnetic field. Some formulae including third order effects in Cz are also given. It is shown that an experimental study of the dependence of this splitting on the angles of rotation about any two arbitrary mutually perpendicular axes is sufficient, when second order effects are measurable, to yield the values of | Cz |, η, and the orientation of the principal axes of the electric field gradient tensor at the nuclear sites. In the case that the direction of one of the principal axes is known from crystal symmetry, a single rotation about this axis gives the complete information.A new method of determining nuclear spin I is proposed which depends on comparing first and second order shifts of the resonance frequencies of the strong inner line components. The method will be of interest in those cases where the total number 2I of line components can not be unambiguously ascertained owing to the outer line components being excessively broadened and weakened by crystal imperfections.

scholarly journals Second-order pyramidal slip in zinc single crystals

1967 ◽  
Vol 2 (4) ◽  
pp. 201-207 ◽  
Author(s):  
K.H. Adams ◽  
R.C. Blish ◽  
T. Vreeland
Keyword(s):  
Single Crystals ◽  
Second Order ◽  
Pyramidal Slip
Sign in / Sign up

Export Citation Format

Share Document