Results 91 to 100 of about 1,034,226 (285)

Using a dual plasma process to produce cobalt--polypyrrole catalysts for the oxygen reduction reaction in fuel cells -- part II: analysing the chemical structure of the films

, 2012
The chemical structure of cobalt--polypyrrole -- produced by a dual plasma process -- is analysed by means of X-ray photoelectron spectroscopy (XPS), near edge X-ray absorption spectroscopy (NEXAFS), X-ray diffraction (XRD), energy-dispersive X-Ray ...
Antje Quade, Bogdanoff, Christian Walter, Denis Vyalikh, Klaus-Dieter Weltmann, Kurt Kummer, Volker Brüser   +6 more
core   +1 more source

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

4p states and X-Ray Spectroscopy

, 2005
The 4p states in transition metals and their compounds usually play minor roles on their physical quantities. Recent development of resonant x-ray scattering (RXS) at the K-edge of transition metals, however, casts light on the 4p states, because the ...
Herrero-Martin J, Jun-ichi Igarashi, Kugel K I, Lovesey S W, Manabu Takahashi   +4 more
core   +1 more source

Oxide‐Free Titanium Coatings by Wire Arc Spraying in a Silane‐Doped Inert Atmosphere

Advanced Engineering Materials, EarlyView.
A silane‐doped argon atmosphere enables the production of oxide‐free titanium coatings via twin‐wire arc spraying at ambient pressure. This innovative approach eliminates residual oxygen, creating process conditions that prevent oxidation and nitride formation.
Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald, Hans Jürgen Maier   +4 more
wiley   +1 more source

Si(Li) X-ray astronomical spectroscopy [PDF]

The general considerations involved in the choice of Si(Li) as a non-dispersive spectrometer for X-ray astronomy are discussed. In particular, its adaptation to HEAO-B is described as an example of the space-borne application of Si(Li ...
Holt, S. S.
core   +1 more source

X-ray Astronomy in the Laboratory with a Miniature Compact Object Produced by Laser-Driven Implosion

, 2009
Laboratory spectroscopy of non-thermal equilibrium plasmas photoionized by intense radiation is a key to understanding compact objects, such as black holes, based on astronomical observations.
A Bar-Shalom, A Ng, A H Gabriel, B A Remington, B A Remington, C Rousseaux, C Yamanaka, C B Tarter, David Salzmann, D A Liedahl, D A Liedahl, D E Osterbrock, D R Ballantyne, F Paerels, F Wang, Feilu Wang, G Goldstein, Gang Zhao, G J Ferland, Hideaki Takabe, Hiroaki Nishimura, H K Chung, J Nuckolls, Jae-Min Han, Jie Zhang, Kunioki Mima, M Allen, Minoru Tanabe, M E Foord, Norimasa Yamamoto, N I Shakura, N S Schulz, Quanli Dong, R Giacconi, S Fujioka, S Watanabe, Shinsuke Fujioka, Shoujun Wang, S J Rose, S J Rose, Takashi Fujiwara, T R Kallman, Yi Zhang, Yong-Joo Rhee, Yong-Woo Lee, Yuto Nakabayashi, Yutong Li   +46 more
core   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Design and implementation of PLA/GO/metal oxide composites for CO2 sensing application

Scientific Reports
This study investigates the modification of polylactic acid (PLA) by the incorporation of graphene oxide (GO) and metal oxides (ZnO and CuO), with the aim of developing efficient CO₂ sensors.
Khaled S. Amin, Mohamed M. Yassin, Yahia M. Abdallah, Yusuf M. Alsayyad, Ahmed F. Mabied, Hanan Elhaes, Medhat A. Ibrahim   +6 more
doaj   +1 more source

Ultrafast X-ray Absorption Studies of the Structural Dynamics of Molecular and Biological Systems in Solution

CHIMIA, 2011
We review our recent studies of excited state structures and dynamics of chemical and biological systems with pico- and femtosecond X-ray absorption spectroscopy in the liquid phase.
Christopher J. Milne, Thomas J. Penfold, Susanne Karlsson, Frank van Mourik, Marco Reinhard, Hannelore Rittmann-Frank, Frederico A. Lima, Van-Thai Pham, Renske M. Van der Veen, Majed Chergui   +9 more
doaj   +1 more source

Sol–Gel Derived Polymer Precursors for Stereolithography of ZrC

Advanced Engineering Materials, EarlyView.
ZrC is a critical material target for extreme temperature conditions. This report describes a protocol for preparing ZrC ceramics via stereolithography and examines the impact of the polymer matrix on carbothermal reduction and mechanical stability of 3D printed ZrC.
Charles J. Rafalko, Evelyn Wang, Michael A. Hickner   +2 more
wiley   +1 more source