Kinetics of phase transformations in the surface layer of a binary alloy upon selective dissolution. IV. Ag-Pd|Ag+ system

2012 ◽  
Vol 48 (4) ◽  
pp. 411-418 ◽  
Author(s):  
O. A. Kozaderov ◽  
A. V. Dorokhov ◽  
A. V. Vvedenskii
Keyword(s):  
Surface Layer ◽  
Phase Transformations ◽  
Binary Alloy ◽  
Selective Dissolution ◽  
Kinetics Of

An Explanation of the Removal of Metastability in Some Hydroacid Salts by Water Adsorption

2001 ◽  
Vol 56 (12) ◽  
pp. 869-872
Author(s):  
B. Baranowski ◽  
A. Lundén
Keyword(s):  
Phase Transition ◽  
Surface Layer ◽  
Water Activity ◽  
Induction Time ◽  
Lattice Spacing ◽  
Water Adsorption ◽  
Zeroth Order ◽  
Exponential Functions ◽  
Kinetics Of ◽  
Volume Decrease

Abstract The metastability of some phases of CsHSO4 and RbH2PO4 is due to the volume decrease at an endothermic phase transition which "locks in" the metastability in question. Water adsorption, which removes these metastabilities, probably exerts a "wedge-like" force which expands the lattice spacing in the surface layer, thus facilitating the start of the phase transition. The induction time and the zeroth order kinetics of the transition in RbH2PO4 are exponential functions of the water activity applied.

Kinetics of phase transformations in real finite systems: Application to switching in ferroelectrics

1998 ◽  
Vol 84 (1) ◽  
pp. 445-451 ◽  
Author(s):  
Vladimir Shur ◽  
Evgenii Rumyantsev ◽  
Sergei Makarov
Keyword(s):  
Phase Transformations ◽  
Finite Systems ◽  
Kinetics Of

scholarly journals Transformations of the Microstructure and Phase Compositions of Titanium Alloys during Ultrasonic Impact Treatment. Part I. Commercially Pure Titanium

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 562
Author(s):  
Alexey Panin ◽  
Andrey Dmitriev ◽  
Anton Nikonov ◽  
Marina Kazachenok ◽  
Olga Perevalova ◽  
...  
Keyword(s):  
Surface Layer ◽  
Phase Transformations ◽  
Pure Titanium ◽  
Surface Plastic ◽  
Commercially Pure Titanium ◽  
Ultrasonic Impact Treatment ◽  
Coordination Numbers ◽  
Microscopy Technique ◽  
Transmission Electron ◽  
Treated Sample

Experimental and theoretical studies helped to reveal patterns of surface roughening and the microstructure refinement in the surface layer of commercial pure titanium during ultrasonic impact treatment. Applying transmission electron microscopy technique, a gradient microstructure in the surface layer of the ultrasonically treated sample, where the grain size is varied from nano- to micrometers was revealed. It was shown that the surface plastic strains of the titanium sample proceeded according to the plastic ploughing mechanism, which was accompanied by dislocation sliding, twinning, and the transformations of the microstructure and phase composition. The molecular dynamics method was applied to demonstrate the mechanism of the phase transformations associated with the formation of stacking faults, as well as the reversible displacement of atoms from their sites in the hcp lattice, causing a change in coordination numbers. The role of the electronic subsystem in the development of the strain-induced phase transformations during ultrasonic impact treatment was discussed.

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