Oxidation kinetics of a Pb-64 at.% in single-phase alloy

1991 ◽  
Vol 36 (5-6) ◽  
pp. 465-474 ◽  
Author(s):  
M. -X. Zhang ◽  
Y. A. Chang ◽  
V. C. Marcotte
Keyword(s):  
Oxidation Kinetics ◽  
Single Phase ◽  
Single Phase Alloy ◽  
Kinetics Of

Oxidation of (Pb, Sn) and (Pb, In) Alloys

1990 ◽  
Vol 112 (2) ◽  
pp. 175-178 ◽  
Author(s):  
R. A. Konetzki ◽  
M. X. Zhang ◽  
D. A. Sluzewski ◽  
Y. A. Chang
Keyword(s):  
Oxidation Kinetics ◽  
Electron Spectroscopy ◽  
Single Phase ◽  
Inversion Layer ◽  
Bulk Alloy ◽  
Solute Content ◽  
Enhanced Diffusion ◽  
Parabolic Kinetics ◽  
Scanning Auger Microprobe ◽  
Kinetics Of

The oxidation of (Pb,Sn) and (Pb,In) single-phase alloys and the Pb-Sn eutectic was studied using Auger electron spectroscopy (AES) and a scanning Auger microprobe (SAM). The oxidation of the single-phase alloys results in a structure which has been called “an oxide inversion layer”, where the amount of solute in the oxide increases with depth into the oxide layer, reaches a maximum, then decreases to its value in the bulk alloy. The solute content of the oxide is noticeably higher in the region surrounding grain boundaries, due to the enhanced diffusion of the solute. Grain boundary oxidation is also observed in the single-phase alloys. The oxidation kinetics of both the single-phase (Pb,Sn) alloys and the eutectic alloy are logarithmic at 22° C and 90° C, but become parabolic at temperatures greater than 120° C. Pb-3.0 at. percent In alloys follow logarithmic oxidation kinetics up to 150°C and parabolic kinetics between 175°C and 250°C.

Oxidation Kinetics of (Pb-In) Single-Phase Alloys

1989 ◽  
Vol 167 ◽  
Author(s):  
M.-X. Zhang ◽  
Y. A. Chang ◽  
V. C. Marcotte
Keyword(s):  
Melting Temperature ◽  
Oxidation Kinetics ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Room Temperature ◽  
Single Phase ◽  
Depth Profiling ◽  
Parabolic Kinetics ◽  
Logarithmic Law ◽  
Kinetics Of

AbstractThe solid state oxidation kinetics of Pb-In single-phase alloys were studied using AES (Auger Electron Spectroscopy) combined with sputter depth profiling. Samples containing 3, 30, 64 at% In were oxidized in air from room temperature up to 275 °C. At room temperature, the oxidation behavior for all three alloys was found to obey a direct logarithmic law. As the temperature is increased, the kinetics change from logarithmic to parabolic behavior. The transition between logarithmic and parabolic kinetics occurs between 150 °C and 175 °C for Pb-3 at% In alloy, and below 100 °C for Pb-30 at% In and Pb-64 at% In alloys. Using the solidius temperature as melting temperature of an alloy, the transition temperature for Pb-In alloys was observed to be approximately 70 – 75 % of the melting temperature.

Oxidation kinetics of Pb–Sn alloys

1989 ◽  
Vol 4 (6) ◽  
pp. 1421-1426 ◽  
Author(s):  
R. A. Konetzki ◽  
Y. A. Chang ◽  
V. C. Marcotte
Keyword(s):  
Solid State ◽  
Auger Electron Spectroscopy ◽  
Oxidation Kinetics ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Single Phase ◽  
Depth Profiling ◽  
Eutectic Alloys ◽  
Parabolic Oxidation ◽  
Kinetics Of

The solid state oxidation kinetics of Pb–Sn single-phase (2.5 at. % Sn) and eutectic alloys were studied with Auger Electron Spectroscopy combined with sputter depth profiling. The single-phase samples were oxidized in air in the temperature range 22 °C to 250 °C, while the eutectic samples were oxidized from 22 °C to 175 °C. Both alloys oxidize logarithmically between 22 °C and 90 °C and parabolically at temperatures greater than 120 °C. The activation energies for the parabolic oxidation of the single-phase and eutectic alloys are 69.5 and 67.1 ± 8 kJ/mole, respectively.

Oxidation kinetics of methylhydrazine in a strictly single-phase medium studied in reconstituted air

2009 ◽  
Vol 50 (5) ◽  
pp. 715-724 ◽  
Author(s):  
J. Molinet ◽  
V. Pasquet ◽  
A. J. Bougrine ◽  
H. Delalu
Keyword(s):  
Oxidation Kinetics ◽  
Single Phase ◽  
Phase Medium ◽  
Kinetics Of

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

Analysis of process of emulsions transport in hydrophilic/oleophilic granular porous media driven by capillary force

2018 ◽  
Vol 2 (21) ◽  
pp. 85-101
Author(s):  
Olga Shtyka ◽  
Łukasz Przybysz ◽  
Mariola Błaszczyk ◽  
Jerzy P. Sęk
Keyword(s):  
Porous Media ◽  
Experimental Research ◽  
Granular Media ◽  
Single Phase ◽  
Influential Factor ◽  
Dispersed Phase ◽  
Porous Structures ◽  
Phase Concentration ◽  
Granular Porous Media ◽  
Kinetics Of

The research focuses on the issues concerning a process of multiphase liquids transport in granular porous media driven by the capillary pressure. The current publication is meant to introduce the results of experimental research conducted to evaluate the kinetics of the imbibition and emulsions behavior inside the porous structures. Moreover, the influence of the dispersed phase concentration and granular media structure on the mentioned process was considered. The medium imbibition with emulsifier-stabilized emulsions composed of oil as the dispersed phase in concentrations of 10 vol%, 30 vol%, and 50 vol%, was investigated. The porous media consisted of oleophilic/hydrophilic beads with a fraction of 200–300 and 600–800 μm. The experimental results provided that the emulsions imbibition in such media depended stronger on its structure compare to single-phase liquids. The increase of the dispersed phase concentration caused an insignificant mass decreasing of the imbibed emulsions and height of its penetration in a sorptive medium. The concentrations of the imbibed dispersions exceeded their initial values, but reduced with permeants front raise in the granular structures that can be defined as the influential factor for wicking process kinetics.

Oxidation Kinetics of Fe(II) in a Eutrophic Swiss Lake

1998 ◽  
Vol 32 (19) ◽  
pp. 2990-2996 ◽  
Author(s):  
Lukas Emmenegger ◽  
D. Whitney King ◽  
Laura Sigg ◽  
Barbara Sulzberger
Keyword(s):  
Oxidation Kinetics ◽  
Swiss Lake ◽  
Kinetics Of

Oxidation Kinetics of Oil Shale Semicokes: Reactivity as a Function of Pyrolysis Temperature and Shale Origin

2013 ◽  
Vol 27 (2) ◽  
pp. 666-672 ◽  
Author(s):  
Jillian L. Goldfarb ◽  
Anthony D’Amico ◽  
Christopher Culin ◽  
Eric M. Suuberg ◽  
Indrek Külaots
Keyword(s):  
Oxidation Kinetics ◽  
Oil Shale ◽  
Pyrolysis Temperature ◽  
Kinetics Of

High Temperature Oxidation Kinetics of Shot-Peened and Laser-Shock Peened Ti-Beta-21S

2021 ◽  
Author(s):  
V. Optasanu ◽  
M. C. Marco de Lucas ◽  
A. Kanjer ◽  
B. Vincent ◽  
T. Montesin ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Kinetics ◽  
High Temperature Oxidation ◽  
Laser Shock ◽  
Temperature Oxidation ◽  
Kinetics Of
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