Results 111 to 120 of about 2,758 (292)

Support‐Controlled Reaction Pathways via Dynamic Sulfur‐Mediated Interfaces for Selective Urea Electrolysis

Advanced Functional Materials, EarlyView.
Sulfur‐doped graphitized carbon nanofibers act as adaptive catalyst–support platforms, enabling dynamic sulfur‐mediated reconstruction and strong metal–support interactions. This unique behavior enhances catalyst stability and controls reaction pathways, achieving highly selective urea oxidation (∼92% N2) coupled with efficient hydrogen evolution ...
Melanie Guillén‐Soler, Lucía Vizcaíno‐Anaya, Ahmad Tayyebi, José Manuel Vila‐Fungueiriño, María del Carmen Giménez‐López   +4 more
wiley   +1 more source

Influence of use of ultrasound on the mechanical properties of plated pieces by welding in ultrasonic field

Metalurgija, 2015
Plating by welding in an ultrasonic field represents a technological solution to increase resistance to corrosion and / or wear of pieces of the machinery industry.
Gh. Amza, V. Petrescu, D. Dobrotă, Z. Apostolescu, R. G. Albulescu   +4 more
doaj  

Study of Gasdynamic Effect Upon the Weld Geometry When Concumable Electrode Welding

, 2016
The paper considers the ways of weld geometry controlling when consumable electrode welding under single-jet and double-jet gas shielding. The authors provide comparative results of experimental studies on the effects of shielding gas supply upon the ...
Chinakhov, Dmitriy Anatol'evich, Grigoryeva, Ekaterina Grigorievna, Mayorova, E. I.   +2 more
core   +1 more source

Wood Cellulosic Membrane With Abundant Nanochannels for Stabilizing Aqueous Zn‐Ion Batteries

Advanced Functional Materials, EarlyView.
A wood‐derived cellulosic membrane separator is developed to suppress dendrite growth in aqueous zinc‐ion batteries. Its aligned nanochannels and hydroxyl‐rich surfaces enable uniform Zn2+ flux, water immobilization, and interfacial stabilization. Zn||Zn cells achieve 1920 h of cycling, Zn||Cu cells maintain 99.5% Coulombic efficiency over 1000 cycles,
Song Wei, Yunpeng Zhong, Ruwei Chen, Shanshan Jia, Hongping Dong, Zhen Zhang, Lei Li, Yiqiang Wu, Guanjie He   +8 more
wiley   +1 more source

Preparation and nucleation of spherical metallic droplet [PDF]

China Foundry, 2015
The preparation and solidification of metallic droplets attract more and more attention for their significance in both engineering and scientific fields.
Bing-ge Zhao, Lin-fang Li, Wei Dong
doaj  

General Synthesis of Amorphous Pd‐Based Nanoparticles Towards Highly Efficient Nitrate‐to‐Ammonia Electrocatalysis

Advanced Functional Materials, EarlyView.
A family of amorphous palladium‐based multi‐component phosphides nanoparticles, synthesized via a robust one‐step wet‐chemical method, overcoming the immiscibility of different elements and the difficulty in forming a stable, disordered structure. When applied in the electrochemical nitrate reduction reaction, these nanocatalysts effectively suppress ...
Lei Xu, Chuhao Luan, Mingzi Sun, Weiwei Chen, Xiaozhi Liu, Chen Ma, Long Zheng, Gang Wang, Peng Han, Ping Gu, Xiao Wang, Chenhao Shu, Cheng Lyu, Zhenyu Zhang, Nailiang Yang, Hongyan He, Xiaohong Li, Dong Su, Bolong Huang, Wenjun Zhang, Ye Chen   +20 more
wiley   +1 more source

Influence of use of ultrasound on metallographic structure of plated pieces by welding in ultrasonic field

Metalurgija, 2015
To optimize the plating process is necessary to know the behavior of surfaces plated during the exploitation and in particular susceptibility to cracking, the formation of cracks from the inside to outside or reverse, embrittlement in the heat affected ...
Gh. Amza, D. Dobrotă, V. Petrescu, Z. Apostolescu, R. G. Albulescu   +4 more
doaj  

Redirecting Nano‐Silicon Agglomeration: Dual‐Carbon Design Triggers Self‐Adaptive Nanoporous Si Sponge for Enhanced Lithium Storage

Advanced Functional Materials, EarlyView.
This study addresses silicon anode degradation using an engineered nSi/Gr/C dual‐carbon matrix. By restricting SEI infiltration, the architecture redirects silicon agglomeration into a beneficial structural self‐adaptive activation. During cycling, silicon nanoparticles self‐organize into a resilient nanoporous sponge. This dynamic network accommodates
Wei Zhang, Yuxia Zhong, Wen Ren, Lei Zhang, Yexin Pan, Mitch Guijun Li, Gary J. Cheng, Ruohan Yu   +7 more
wiley   +1 more source

MELTING RATE CALCULATION ON PREHEATED WIRES OF VARIOUS CHEMISTRY UNDER ARC WELDING

Вестник Донского государственного технического университета, 2018
The empirical factors dependences on the process parameters for the welding wires of various chemist ry are o btained for t he empirical formula permitting to calculate the wire melting rate (feed) in a wide range of current s, preheat temperatures ...
Evgeny N. Varukha, Alexander S. Korobtsov, Igor S. Morozkin   +2 more
doaj  

Mathematical model of welding circuit in robotic consumable electrode arc welding

, 2016
В статье исследуется математическая модель динамических процессов, протекающих в сварочном контуре при роботизированной дуговой сварке плавящимся электродом в среде защитного газа.
Цыбулькин, Г.А.
core   +1 more source