Results 81 to 90 of about 83,687 (300)

Influence of an Oxygen‐Free Atmosphere on Diamond‐Single‐Grain Scratching of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
Single‐grain scratching of Ti–6Al–4V is investigated under controlled, oxygen‐free, and ambient atmospheres using a novel experimental setup with in situ high‐speed imaging. The approach enables direct observation of chip formation and adhesion under suppressed oxidation.
Berend Denkena, Benjamin Bergmann, Michael Zenger   +2 more
wiley   +1 more source

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Evolutions of geometry and electronic state introduced by oxygen vacancy for CaMnO3 compound

Results in Physics, 2019
The cell structures, locally micro-structures, combinations, electronic states as well as carrier transports induced by Oxygen vacancy for the CaMnO3 compound have been systematically investigated by pseudo-potential plane wave functions within the ...
C.S. Huang, H. Fang, Z.H. Xu, X. Zheng, X.X. Ruan   +4 more
doaj   +1 more source

Ab initio free energy of vacancy formation and mass-action kinetics in vis-active TiO2 [PDF]

, 2008
Recent reports have identified bulk defects such as oxygen vacancies as key players in visible-light photoactive TiO2. This would imply greater visible light absorption rates may be possible provided effective defect engineering can be achieved.
Fultz, Brent, Keith, J. Brandon, Lewis, James P., Wang, Hao   +3 more
core  

Hubbard band or oxygen vacancy states in the correlated electron metal SrVO$_3$?

, 2016
We study the effect of oxygen vacancies on the electronic structure of the model strongly correlated metal SrVO$_3$. By means of angle-resolved photoemission (ARPES) synchrotron experiments, we investigate the systematic effect of the UV dose on the ...
Backes, S., Berini, B., Bertran, F., Dumont, Y., Fortuna, F., Fouchet, A., Frantzeskakis, E., Fèvre, P. Le, Horiba, K., Jeschke, H. O., Kim, A. J., Kitamura, M., Kobayashi, M., Kumigashira, H., Lechermann, F., Mitsuhashi, T., Rozenberg, M. J., Rödel, T. C., Saint-Martin, R., Santander-Syro, A. F., Valentí, R., Yukawa, R.   +21 more
core   +2 more sources

Assessing Altered Coating Adhesion on Plasma‐Deoxidized Surfaces Under Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
This study demonstrates the effectiveness of atmospheric pressure plasma pretreatment in modifying silicon and stainless steel surfaces to improve adhesion. Argon‐hydrogen plasma increases surface roughness and improves adhesion strength, whereas pure argon results in smoother surfaces and structural changes.
Selina Raumel, Lara Kuhr, Khemais Barienti, Sebastian Herbst, Florian Nürnberger, Hans Jürgen Maier, Marc C. Wurz   +6 more
wiley   +1 more source

Oxygen Vacancy Linear Clustering in a Perovskite Oxide

The Journal of Physical Chemistry Letters, 2017
Oxygen vacancies have been implicitly assumed isolated ones, and understanding oxide materials possibly containing oxygen vacancies remains elusive within the scheme of the isolated vacancies, although the oxygen vacancies have been playing a decisive role in oxide materials.
Kitae Eom, Euiyoung Choi, Minsu Choi, Seungwu Han, Hua Zhou, Jaichan Lee   +5 more
openaire   +3 more sources

Dynamic Testing of Cold Gas Sprayed Bipolar Plates–Porous Transport Layer Coating System in Proton Exchange Membrane Water Electrolysis

Advanced Engineering Materials, EarlyView.
Through direct application of porous transport layer (PTL) on the bipolar plate (BPP) with thermal spraying, the interfacial contact resistance is improved. With the cold gas sprayed BPP–PTL coating system, a proton exchange membrane water electrolysis cell with a cell voltage of Ucell = 1.9 V can be operated up to i = 2.5 A/cm2 in a dynamic mode ...
Kirsten Bobzin, Marvin Erck, Kevin Jasutyn, Katja Radermacher, Andreas Bund, Mario Kurniawan   +5 more
wiley   +1 more source

Atomic‐Scale Mechanisms of Multi‐Resistance States in HfOx‐Based RRAM: Evolution of Atomic Electric Fields and Oxygen Vacancies

Advanced Science
The stability of multilevel resistive switching in HfOx‐based RRAM is crucial for enhancing matrix‐vector multiplication efficiency in computing‐in‐memory architectures, yet precise control over conductive filament formation is limited by an incomplete ...
Wen Sun, Yuyan Wang, Ruofei Hu, Yuyao Lu, Jun Xu, Xinyi Li, Bin Gao, He Qian, Jianshi Tang, Huaqiang Wu   +9 more
doaj   +1 more source

Oxygen Vacancy in ZnO-$w$ Phase: Pseudohybrid Hubbard Density Functional Study

, 2020
The study of zinc oxide, within the homogeneous electron gas approximation, results in overhybridization of zinc $3d$ shell with oxygen $2p$ shell, a problem shown for most transition metal chalcogenides.
Eriksson, Olle, Pervishko, Anastasiia A., Rodnyi, Piotr A., Sanyal, Biplab, Vrubel, Ivan I., Yudin, Dmitry   +5 more
core   +1 more source