Development Kinetics of the Plastic Wave Front at the Metal Interface

2020 ◽  
Vol 63 (5) ◽  
pp. 731-737
Author(s):  
S. A. Barannikova ◽  
Yu. V. Li
Keyword(s):  
Wave Front ◽  
Plastic Wave ◽  
Metal Interface ◽  
Kinetics Of

Plastic wave front propagation in cylindrical bars

1987 ◽  
Vol 37 (7) ◽  
pp. 830-845
Author(s):  
J. Buchar ◽  
Z. Bílek ◽  
P. Polcar ◽  
Z. Knésl
Keyword(s):  
Wave Front ◽  
Front Propagation ◽  
Plastic Wave ◽  
Wave Front Propagation

Dynamics Evolution of Shock Waves in Laser-Material Interaction

2008 ◽  
Author(s):  
Sobieslaw Gacek ◽  
Xinwei Wang
Keyword(s):  
Shock Wave ◽  
Wave Front ◽  
Shock Wave Front ◽  
Structural Evolution ◽  
Md Simulations ◽  
Background Gas ◽  
Supersonic Shock ◽  
Kinetics Of ◽  
Material Interaction ◽  
Insight Into

In this work, the dynamics of the shock wave in laser-ablated argon plume with its evolution through the background gas is explored at the atomic level. Molecular Dynamics (MD) simulations have been conducted which give the insight into atomistic scale interaction and correlation effects of the propagating shock wave in the background medium. The supersonic shock wave front carries inherent sharp increase in density, temperature, and pressure. These thermodynamic parameters of the expanding shock wave are evaluated with emphasis on the kinetics of the shock wave front. The position of the shock wave front has been defined and determined over nanoseconds. Extensive research is elaborated upon to study the inside structural evolution of the shock wave and the effect of optical absorption depth.

Elasto-Plastic Wave Front Propagation In Non-Linear Particle Systems

2008 ◽  
Author(s):  
Muhammad Shoaib ◽  
Leif Kari ◽  
Bengt Enflo ◽  
Claes M. Hedberg ◽  
Leif Kari
Keyword(s):  
Wave Front ◽  
Front Propagation ◽  
Particle Systems ◽  
Plastic Wave ◽  
Non Linear ◽  
Wave Front Propagation

Crotonaldehyde hydrogenation on platinum–titanium oxide and platinum–cerium oxide catalysts: selective CO bond hydrogen requires platinum sites beyond the oxide–metal interface

2016 ◽  
Vol 6 (18) ◽  
pp. 6824-6835 ◽  
Author(s):  
Xin Yang ◽  
Yutichai Mueanngern ◽  
Quinn A. Baker ◽  
L. Robert Baker
Keyword(s):  
Titanium Oxide ◽  
Cerium Oxide ◽  
Oxide Catalysts ◽  
Metal Interface ◽  
Crotonaldehyde Hydrogenation ◽  
Kinetics Of ◽  
Bond Hydrogenation

We have investigated a series of Pt–TiO2 and Pt–CeO2 catalysts for crotonaldehyde hydrogenation with the goal of better understanding the kinetics of CO bond hydrogenation.

Kinetics of ionization and excitation of mercury atoms in the relaxation flow zone behing the shock wave front

1971 ◽  
Vol 35 (6) ◽  
pp. 419-420 ◽  
Author(s):  
G.K. Tumakev ◽  
T.V. Zhikhareva ◽  
V.R. Lazovskaya
Keyword(s):  
Shock Wave ◽  
Wave Front ◽  
Shock Wave Front ◽  
Flow Zone ◽  
Kinetics Of

Influence of Si Content on the Oxide Scale Formation of Ni-Based Alloy

2009 ◽  
Vol 79-82 ◽  
pp. 2239-2242
Author(s):  
Chu Lei ◽  
Li Xiang Chen ◽  
Ning Zhang ◽  
Yan Sheng Yin
Keyword(s):  
Oxide Scale ◽  
Effective Diffusion ◽  
Eutectic Structure ◽  
Fast Diffusion ◽  
Austenite Matrix ◽  
Metal Interface ◽  
Outward Diffusion ◽  
Diffusion Paths ◽  
Si Content ◽  
Kinetics Of

Effects of silicon concentrations in Ni-Cr-based alloys on the formation of oxide scales were examined in reduced atmosphere. The morphology and oxide scale were compared based on the Si content. The formation and growth kinetics of the oxide scale are rather sensitive to the alloy microstructures and their corresponding Si contents. Oxide ridges formed on the eutectic structure preferentially, while a thinner and homogeneous oxide scale grew from the austenite matrix. The thicknesses of the oxide ridges and the oxide layer on the austenite matrix are dependent of their corresponding Si contents. The ridge-like feature indicates that the austenite/carbide phase boundaries offer fast diffusion paths for metal atom outward diffusion. The formation of SiO2 sub-layer at the oxide scale/metal interface can act as an effective diffusion barrier for atom outward diffusion.

Direct observations of radiation-enhanced transformations in glass

1983 ◽  
Vol 41 ◽  
pp. 354-355
Author(s):  
J. F. DeNatale ◽  
D. G. Howitt
Keyword(s):  
Glass Matrix ◽  
Diffusion Mechanism ◽  
Bubble Formation ◽  
Silicate Glasses ◽  
Phase Decomposition ◽  
Direct Observations ◽  
Thin Foils ◽  
Oxygen Bubble ◽  
Electron Energy Loss ◽  
Kinetics Of

The electron irradiation of silicate glasses containing metal cations produces various types of phase separation and decomposition which includes oxygen bubble formation at intermediate temperatures figure I. The kinetics of bubble formation are too rapid to be accounted for by oxygen diffusion but the behavior is consistent with a cation diffusion mechanism if the amount of oxygen in the bubble is not significantly different from that in the same volume of silicate glass. The formation of oxygen bubbles is often accompanied by precipitation of crystalline phases and/or amorphous phase decomposition in the regions between the bubbles and the detection of differences in oxygen concentration between the bubble and matrix by electron energy loss spectroscopy cannot be discerned (figure 2) even when the bubble occupies the majority of the foil depth.The oxygen bubbles are stable, even in the thin foils, months after irradiation and if van der Waals behavior of the interior gas is assumed an oxygen pressure of about 4000 atmospheres must be sustained for a 100 bubble if the surface tension with the glass matrix is to balance against it at intermediate temperatures.

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