Improvement of surface flashover in vacuum

Author: jzxw

August undefined, 2024

WitrynaThe temperature-variable stage comprises: introducing a cooling gas into the carburizing chamber after the pulse carburizing stage, so that a surface layer of a workpiece is rapidly cooled to a temperature below 700°C and stabilized for a period of time, so that carbides are uniformly precipitated and spheroidized; then pumping to vacuum ... Witryna5 paź 2024 · Corresponding experiments are also conducted to corroborate previous conclusions, presenting both a deflected electron trajectory and an improved …

Improvement of surface flashover in vacuum

Witryna9 kwi 2024 · Experimental results show that the surface flashover voltage of treated samples improves remarkably and increases with the injection energy. After ion implantation, the content of fluorine in the treated samples decreases, and the content of oxygen increases. Witryna27 wrz 2004 · The relation of trap distribution of alumina with surface flashover performance in vacuum Published in: XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Article #: Date of Conference: 27 September 2004 - 01 October 2004 Date Added to IEEE Xplore: 25 … can a 14 year old get a credit card

Materials Free Full-Text Surface Modification-Dominated Space ...

Witryna31 mar 2024 · The NPS were cleaned in low-salinity water with PH 7 and vacuum dried for 12 h to remove water. The EP was mixed with NPS with different mass fractions. ... It can be concluded that the effective reduction of the expansion coefficient of the electrical tree and the improvement of the breakdown lifetime in EP/SiO 2-0.5 and EP/SiO 2-1 … WitrynaOzone modification has recently been developed for improving the surface flashover performance. However, the effect of ozone on surface properties is still not fully elucidated. In this work, various concentrations of ozone are used to modify epoxy composites and their DC flashover voltages in SF 6 at 0.1 MPa are evaluated. The … WitrynaSurface flashover performance measurement results show that surface flashover voltage of LDPE specimens is improved by surface ozone treatment, and the optimum value … can a 14 year old get a bank account

The relation of trap distribution of alumina with surface flashover ...

Surface flashover performance in vacuum of different insulation ...

WitrynaSurface flashover in vacuum imposes a substantial physical limit on modern, large-scale pulsed power. One of the ramifications is a minimum size requirement for new machines, which in itself... WitrynaShop for the JOYAMI Wet Dry Vacuum Cleaners, Floor Cleaner Mop 2-in-1 Cordless Vacuum for Multi-Surface with Dual-Tank System, Lightweight, Self-Cleaning and Drying Brush Roll, White at the Amazon Home & Kitchen Store. Find products from JOYAMI with the lowest prices. fish are fatWitrynaSurface flashover of insulation systems is a basic issue in the field of high voltage and electrical insulation. To improve the surface flashover performance is of great … fish are invertebrates true or false

"Witryna19 sty 2024 · Combining with the results above, a model with combined effects of both kinetic and deposited electrons on surface flashover in vacuum is thus proposed, base on which the guidance for the... " - Improvement of surface flashover in vacuum

Improvement of surface flashover in vacuum

Flashover - an overview ScienceDirect Topics

WitrynaThe author reviews surface flashover (i.e. voltage breakdown along the surface of insulators), primarily in vacuum. He discusses theories and models relating to surface flashover and pertinent experimental results. Surface flashover of insulators in vacuum generally is initiated by the emission of electrons from the cathode triple junction (the … Witryna6 wrz 2024 · Surface Treatments A New Surface Treatment Method for Improving Surface Flashover Performance of Polymers in Vacuum Authors: Yongjie Nie Xi'an …

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Witryna6 gru 2010 · The influences of Mo addition of Mo/Al 2 O 3 cermet on the surface flashover voltage in vacuum of samples were experimentally investigated, indicating that the surface flashover voltage of three and five-layer structures were improved by 77% and 117%, respectively. Through electrostatic field simulation, it was found that … WitrynaSeveral models describing cathode-initiated flashover have been built on the pioneering work of Boersch and coworkers, published in 1963, and credit the breakdown mechanism to the action of an intense secondary-electron …

WitrynaWith the tendency towards higher power, higher capacity and less scale of the pulsed-power devices, the vacuum surface flashover strength turns to be a primary limitation of the development of the pulsed-power equipments, as it is much lower than the vacuum breakdown strength. To improve the different capabilities of the epoxy composite … WitrynaThe G-11CR film specimens were tested in vacuum at the temperatures of 293 K, 77 K and 9 K and Weibull distribution was obtained. ... The surface flashover voltages did not decrease after 80 times ...

WitrynaAbstract: High voltage vacuum surface flashover is a source of fast particles with velocities of up to $5.10^{5}$ m/s which makes it attractive for use in highly efficient pulsed plasma thrusters (PPT). Directional patterns of mass, charge and velocity of particles in plasma bunches are important parameters by which the efficiency of PPT … Witryna26 lut 2024 · To improve the surface flashover performance is of great significance for the development of advanced power transmission equipment and insulation materials. …

Witryna2 gru 2024 · The improved flashover voltages in a vacuum of modified CLPE are observed, especially when the treatment time is moderate. In our previous work, a He/CF 4 atmospheric pressure plasma jet (APPJ) are used to modify epoxy resin (EP) [ 17 ]. The higher flashover voltages in vacuum of EP are measured.

Witryna24 mar 2024 · To improve the surface flashover performance is of great significance for the development of advanced power transmission equipment and insulation … fish are friends not food weekWitryna1 kwi 2011 · The effects of both conductivity and permittivity of Mo/Al 2 O 3 cermets on the DC and impulse surface flashover voltage in vacuum were experimentally investigated. The result showed that the DC and impulse surface flashover voltage were improved by 52% and 95%, respectively. can a 14 year old drop out of schoolWitrynaAbstract: In the present paper, a new three-layered 45° insulation structure is proposed and investigated to further improve the surface flashover performance of the 45° … fish are friends not food t shirtWitryna6 gru 2010 · 3cermet was designed to improve the surface flashover performance in vacuum through co-firing, where the volume addition of metal Mo was managed from … fish are jumping and the cotton is highWitrynaThe surface flashover is one of the most important factors that limit the performance of electric devices. In this article, the processes of surface flashover under different pressures are observed by a high-speed camera, and the differences between the plasma evolution processes are presented. Moreover, the simulation model of … fish a remarkable way to boost moraleWitryna8 kwi 2024 · The objective of the study was to modify the surface of the silicone rubber, using dielectric barrier discharge (DBD) to improve its hydrophilic properties. The influence of the exposure time, discharge power, and gas composition—in which the dielectric barrier discharge was generated—on the properties of the silicone … can a 14 year old get a gym membershipWitrynaThe author reviews surface flashover (i.e. voltage breakdown along the surface of insulators), primarily in vacuum. He discusses theories and models relating to … fish are not tangible objects