Results 21 to 30 of about 86,200 (263)

Structural-phase transformations during nitro oxidation of steels and surface properties [PDF]

E3S Web of Conferences, 2023
Structural and phase changes in the surface diffusion layer during gas nitriding of steel were studied, with the formation of a crystallographic structure of the nitride layer for subsequent oxidation in water vapor.
Eshkabilov Kholikul
doaj   +1 more source

Pore-Scale Lattice Boltzmann Simulation of Gas Diffusion–Adsorption Kinetics Considering Adsorption-Induced Diffusivity Change

Energies, 2020
The diffusion–adsorption behavior of methane in coal is an important factor that both affecting the decay rate of gas production and the total gas production capacity.
Zhigao Peng, Shenggui Liu, Yingjun Li, Zongwei Deng, Haoxiong Feng   +4 more
doaj   +1 more source

Measuring the through-plane and in-plane oxygen apparent diffusion coefficients in the gas diffusion layer

Frontiers in Energy Research, 2023
Accurately predicting oxygen mass transport resistance and current distribution in fuel cells requires significant knowledge of oxygen diffusion coefficients in both in-plane and through-plane directions.
Keguang Yao, Keguang Yao, Tiehan Long, Yajun Wang, Xiao-Zi Yuan, Yao Yao, Haijiang Wang, Haijiang Wang   +7 more
doaj   +1 more source

Transient Performance Behavior of Proton Exchange Membrane Fuel Cell by Configuration of Membrane and Gas Diffusion Layer

Journal of Thermal Science and Technology, 2010
A single-phase, fully three-dimensional transient numerical simulation was performed to analyze the dynamic response of a proton exchange membrane fuel cell (PEMFC) with single serpentine flow channels. .
Sang Soon HWANG, Sang Seok HAN, Pil Hyong LEE, Bong Il PARK   +3 more
doaj   +1 more source

Study on water and oxygen transfer characteristics of HT-PEM fuel cells

Heliyon, 2023
In this study, a steady-state model is developed by combining mechanical, Navier–Stokes, Maxwell–Stefan, and Butler–Volmer equations. This model is then used to investigate the influences of diffusion layer thickness deformation under a specific assembly
Hongbin He, Haisi Peng, Guangchao Li
doaj   +1 more source

Effect of the Nitrogen Diffusion Layer Formed by Gas Blow Induction Heating Nitriding on Wear Resistance and Fatigue Properties of Titanium Alloy

Proceedings, 2018
The effect of the nitrogen diffusion layer formed by gas blow induction heating nitriding on the wear resistance and the fatigue properties of a titanium alloy was investigated.
Shogo Takesue, Shoichi Kikuchi, Hiroyuki Akebono, Jun Komotori   +3 more
doaj   +1 more source

PHOTOIONIZED MIXING LAYER MODELS OF THE DIFFUSE IONIZED GAS [PDF]

The Astrophysical Journal, 2009
9 pages, 7 figures, accepted in ...
Binette, L., Flores-Fajardo, N., Raga, A. C., Drissen, L., Morisset, C.   +4 more
openaire   +2 more sources

Apparent Permeability Model for Shale Gas Reservoirs Considering Multiple Transport Mechanisms

Geofluids, 2018
Shale formation is featured in nanopores and much gas adsorptions. Gas flow in the shale matrix is not a singular viscous flow, but a combination of multiple mechanisms. Much work has been carried out to analyze apparent permeability of shale, but little
Shijun Huang, Yonghui Wu, Linsong Cheng, Hongjun Liu, Yongchao Xue, Guanyang Ding   +5 more
doaj   +1 more source

Measurement Technique of Oxygen Diffusion Resistance through Gas Diffusion Layer [PDF]

ECS Transactions, 2013
It is important to measure the oxygen diffusion resistance of both gas diffusion layers (GDLs) and catalyst layers (CLs) to improve the performance of polymer electrolyte fuel cells. In this study, we develop a technique to measure oxygen diffusion resistance with high precision. The technique uses an oxygen sensor and zinc-air batteries, which enhance
Hironori Ohira, Katsuhide Kikuchi, Atsushi Ida, Joji Tomiyasu, Atsushi Yamamoto   +4 more
openaire   +1 more source

Effect of seasoning-layer stress on fluorine diffusion

AIP Advances, 2020
In semiconductor thin-film deposition equipment in which a fluorine- or chlorine-based gas is used as a cleaning gas, reducing residual fluorine or chlorine inside the equipment is important for increasing production efficiency and reducing production ...
Min Su Kim, Jeong Woo Lee
doaj   +1 more source