Results 121 to 130 of about 58,048 (311)

Effect of Pilot Arc on Arc Properties of Variable Polarity Plasma Arc

open access: yesChinese Journal of Mechanical Engineering, 2008
Variable polarity plasma arc(VPPA)welding has shown its unique advantages in the welding of thick aluminum alloy plate.Pilot arc and its power source have great influences on arc shape,mechanical properties and static characteristic of arc in variable polarity plasma arc.By means of high-speed photograph,pressure sensor and signal detection system ...
openaire   +1 more source

Arc Root Attachment on the Anode Surface of Arc Plasma Torch Observed with a Novel Method

open access: yes, 2005
The arc-root attachment on the anode surface of a dc non-transferred arc plasma torch has been successfully observed using a novel approach. A specially designed copper mirror with a boron nitride film coated on its surface central-region is employed to ...
潘文霞   +5 more
core  

Dynamic Reconstruction‐Engineered Heterointerfaces for Acidic Hydrogen Evolution at Ampere‐Level Current Density

open access: yesAdvanced Science, EarlyView.
A dynamic reconstruction strategy was utilized to construct PtCu/Cu3P heterostructures on the surface of self‐supporting Cu3P nanowires. The loose porosity in the restructured layer, together with a dynamic “dissolution‐redeposition” equilibrium during electrocatalysis, enables the electrode to maintain a low, stable overpotential for 240 h at ampere ...
Kaixi Wang   +3 more
wiley   +1 more source

Biodegradable Zn‐Based Implants: Progress, Challenges, and Pathways toward Clinical Translation

open access: yesAdvanced Science, EarlyView.
Exploring biodegradable Zn‐based implants offers a promising pathway to next‐generation biomedical devices with balanced degradation and biocompatibility. A comprehensive overview of biodegradable Zn‐based implants, covering their biological significance, material design principles, and advanced engineering strategies is provided.
Panfeng Zhao   +10 more
wiley   +1 more source

Empirical model for quasi direct current interruption with a convoluted arc [PDF]

open access: yes, 2014
This contribution considers various aspects of a quasi direct current, convoluted arc produced by a magnetic field (B-field) connected in parallel with an RLC circuit that have not been considered in combination.
Tennakoon, Sarath B.   +6 more
core  

A Computational Model for High Current Density Arc Plasmas

open access: yes, 2019
A computational model for high current density arc plasmas is developed. Under the assumption of thermodynamic equilibrium the arc plasma is described as a compressible laminar fluid based on the magnetohydrodynamic (MHD) equations and the transport and ...
Alija, M., Kurrat, M.
core   +1 more source

Enhanced Mechanical Properties Via Boron‐Induced Multi‐Mechanism Strengthening in (NbTaTi1.5V)100‐xBx Refractory High Entropy Alloys

open access: yesAdvanced Science, EarlyView.
A trace amount of boron is introduced into NbTaTi1.5V RHEA, forming a finegrained BCC+TiO+TiB microstructure. The TiB phase generates numerous dislocations, strengthening the alloy. The alloy exhibits 3610 MPa compressive fracture strength and 1060 HV microhardness, while retaining 14.8% fracture strain.
Da Wu   +9 more
wiley   +1 more source

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