Nano-tendril bundles (NTBs) are clusters of fuzzy nanostructures that form on tungsten surfaces when they are exposed to helium plasmas under specific conditions, reaching lengths of over 100 µm. Tungsten samples with NTBs and fuzz were exposed to high-density hydrogen plasmas in the Upgraded Pilot-PSI linear plasma device to investigate their response, with a particular focus on unipolar arc ignition and hot spot formation. Although NTBs are prone to arcing due to their high field electron emission characteristics, unipolar arcs have never occurred on NTBs. Post-mortem analysis showed that the heights of the NTBs changed significantly during irradiation mainly due to rapid heating, and that these changes strongly influenced their interaction with high-density plasmas.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11885472 | PMC |
| http://dx.doi.org/10.1038/s41598-025-92412-y | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Formation of hot spots and arc ignition on tungsten with nano-tendril bundles under high-density hydrogen plasma exposure.
Sci Rep
March 2025
DIFFER - Dutch Institute for Fundamental Energy Research, Eindhoven, 5612 AJ, The Netherlands.
Nano-tendril bundles (NTBs) are clusters of fuzzy nanostructures that form on tungsten surfaces when they are exposed to helium plasmas under specific conditions, reaching lengths of over 100 µm. Tungsten samples with NTBs and fuzz were exposed to high-density hydrogen plasmas in the Upgraded Pilot-PSI linear plasma device to investigate their response, with a particular focus on unipolar arc ignition and hot spot formation. Although NTBs are prone to arcing due to their high field electron emission characteristics, unipolar arcs have never occurred on NTBs.
View Article and Find Full Text PDFThe combustion of lemon peel oil/gasoline blends in spark ignition engine with high-insulation piston crown coating.
Sci Rep
November 2024
Department of Mechanical Engineering, Wollo University, Kombolcha Institute of Technology, 208, Kombolcha, Ethiopia.
Article Synopsis
- - The study focused on recovering oil from discarded lemon peel biomass and testing it as a gasoline substitute in engine blends at different volume ratios (10%, 20%, and 30%) using steam distillation for oil extraction.
- - Using an endoscopic visualization approach, the research found that a 10% lemon peel oil blend offered higher thermal efficiency and lower emissions, while premixed combustion produced better combustion characteristics, leading to increased cylinder pressure.
- - To enhance performance, a ceramic coating was applied to the piston using the micro-arc oxidation technique, which improved thermal efficiency by 3% and 4.69% for the 20% lemon peel oil blend compared to uncoated and pure gasoline engines, while also reducing hydrocarbon
Effects of Pulse Interval on Forming Process in Wire Arc Metal Additive Manufacturing Using Pulsed Arc Plasma.
3D Print Addit Manuf
June 2024
Department of Mechanical Engineering and Automation, Harbin Institute of Technology, Harbin, China.
To overcome the material processing challenges induced by high levels of heat input in wire arc additive manufacturing (WAAM), an innovative WAAM method using pulsed arc plasma (PAP-WAAM), was developed by the authors in the previous study. In this method, the PAP generated by the pulsed voltage was used as the heat source. The pulse interval can be defined as the time interval between adjacent pulse voltages, which determines the ignition time and frequency of the arc plasma, thus influencing the forming process.
View Article and Find Full Text PDFResearch on the Welding Process and Weld Formation in Multiple Solid-Flux Cored Wires Arc Hybrid Welding Process for Q960E Ultrahigh-Strength Steel.
Materials (Basel)
June 2024
Tianjin Key Laboratory of High Speed Cutting and Precision Machining, Tianjin University of Technology and Education, Tianjin 300222, China.
This paper proposes a novel welding process for ultrahigh-strength steel. The effects of welding parameters on the welding process and weld formation were studied to obtain the optimal parameter window. It was found that the metal transfer modes of solid wires were primarily determined by electrical parameters, while flux-cored wires consistently exhibited multiple droplets per pulse.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!