Results 31 to 40 of about 7,223 (276)

Effects of Fluorides in the Flux Cored Wire on the Oxygen Content of Weld Metal [PDF]

한국해양공학회지, 2019
Various fluorides, i.e., CaF2, Na3AlF6, K2SiF6, MnF3, MgF2, were added to the flux cored wire, and their effects on the oxygen content of the weld metal were investigated.
Joo-hyeon Cha, Kook-soo Bang
doaj   +1 more source

Structure and peculiarities of the (8 x n)-type Si(001) surface prepared in a molecular-beam epitaxy chamber: a scanning tunneling microscopy study

, 2009
A clean Si(001) surface thermally purified in an ultrahigh vacuum molecular-beam epitaxy chamber has been investigated by means of scanning tunneling microscopy. The morphological peculiarities of the Si(001) surface have been explored in detail.
A. Goryachko, A. Ney, B. Z. Liu, D. J. Chadi, H. Iton, H. Kageshima, H. W. Liu, J.-Y. Koo, K. Hata, K. N. Eltsov, L. V. Arapkina, R. J. Hamers, T. Kubo, V. A. Yuryev, V. M. Shevlyuga, X. Hu   +15 more
core   +1 more source

Cleanliness improvement and microstructure refinement of ingot processed by vacuum electroslag remelting

Journal of Materials Research and Technology, 2020
The composition analysis, inclusion and microstructure characterizations for two ingots processed by Ar gas protective electroslag remelting (ESR) and vacuum ESR as well as thermodynamic calculation were carried out to explore mechanisms of cleanliness ...
Yu Liu, Xijie Wang, Guangqiang Li, Xuechi Huang, Qiang Wang, Baokuan Li   +5 more
doaj   +1 more source

Investigation of deoxidation of high-silicon austenitic sulfuric acid-resistant stainless steel

Frontiers in Materials, 2022
The oxygen content in high-silicon austenitic sulfuric acid-resistant stainless steels is one of the most detrimental parameters to their corrosion resistance.
Guanxiong Dou, Guanxiong Dou, Hanjie Guo, Hanjie Guo, Jing Guo, Jing Guo, Shaoying Li, Shaoying Li, Yan Yan, Yan Yan, Zihan Wang, Zihan Wang   +11 more
doaj   +1 more source

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Investigation of pre-structured GaAs surfaces for subsequent site-selective InAs quantum dot growth [PDF]

, 2011
In this study, we investigated pre-structured (100) GaAs sample surfaces with respect to subsequent site-selective quantum dot growth. Defects occurring in the GaAs buffer layer grown after pre-structuring are attributed to insufficient cleaning of the ...
Mathieu Helfrich, Roland Gröger, Alexander Förste, Dimitri Litvinov, Dagmar Gerthsen, Thomas Schimmel, Daniel M Schaadt   +6 more
core   +1 more source

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +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

Purification train produces ultrapure hydrogen gas [PDF]

, 1967
Three-stage purification train produces ultrapure hydrogen gas at 1000 psi from K-bottles of high-purity hydrogen.
Walter, R. J.
core   +1 more source

Modification of Non-Metallic Inclusions by Rare-Earth Elements in Microalloyed Steels [PDF]

, 2012
The modification of the chemical composition of non-metallic inclusions by rare-earth elements in the new-developed microalloyed steels was discussed in the paper.
A. Grajcar, M. Opiela
core   +2 more sources