Fast processes on cathode surface resulting in pseudospark discharge

1993 ◽  
Vol 21 (6) ◽  
pp. 725-730 ◽  
Author(s):  
V.F. Puchkarev
Keyword(s):  
Cathode Surface ◽  
Pseudospark Discharge

RESTORATION OF MACHINE PARTS WITH GALVANIZED ZINC COATINGS

2020 ◽  
Vol 4 (141) ◽  
pp. 140-147
Author(s):  
MIKHAIL VIKHAREV ◽  
◽  
VLADIMIR YUDIN ◽  
VESELOVSKIY NIKOLAY ◽  
◽  
...  
Keyword(s):  
Current Density ◽  
Cathode Surface ◽  
Zinc Coating ◽  
Cathode Current Density ◽  
Research Purpose ◽  
Cathode Layer ◽  
Properties Of Coatings ◽  
Chemical Polarization ◽  
Cathode Current ◽  
Zinc Coatings

The article shows the role of electroplating in the restoration of parts, indicates the advantages of restoring parts with electroplating over other methods, and gives the characteristics and properties of coatings obtained by electroplating. (Research purpose) The research purpose is in increasing the speed of application of zinc electroplating when restoring parts. (Materials and methods) The cathode current density has a decisive influence on the coating speed. The main reason for limiting the cathode current density during galvanizing from sulfuric acid electrolytes is the chemical polarization of the cathode. The article presents a study on the designed installation for the application of galvanic coatings. When applying coatings to the internal surfaces of parts, there was used a device with activating elements having an electromechanical rotation drive. This device prevents depletion of the near-cathode layer of the electrolyte and reduces the chemical polarization of the cathode. Elements made of moisture-resistant skin were used as activators. (Results and discussion) The article presents the results of experiments as a dependence of the coating speed on the speed of the activator relative to the restoring surface. It also presents the relationship between the size of the abrasive grains of the activating elements, the force of their pressing against the cathode surface, the speed of movement of the activator and the speed of applying the zinc coating, as well as its quality. By activating the cathode surface, it was possible to raise the operating current density to 100-150 amperes per square decimeter. The speed of application of zinc coatings is 16-25 micrometers per minute. (Conclusions) In the course of research, authors determined the conditions of electrolysis during galvanizing, which provide a significant increase in the cathode current density and the rate of application of these coatings during the restoration of parts.

Evaluation of Cathode Heater Assembly for 42 GHz, 200 kW Gyrotron

Frequenz ◽  
2014 ◽  
Vol 68 (9-10) ◽  
Author(s):  
S. K. Sharma ◽  
Narendra Kumar Singh ◽  
Udaybir Singh ◽  
Hasina Khatun ◽  
Nitin Kumar ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Cathode Surface ◽  
Magnetron Injection Gun ◽  
Heater Power ◽  
Vacuum Processing

AbstractIn this paper, the evaluation of cathode-heater assembly of magnetron injection gun (MIG) for 42 GHz, 200 kW gyrotron is presented. The cathode-heater assembly is purchased from M/S SEMICON.The cathode-heater assembly is experimentally studied in three different conditions; in a belljar system, during vacuum processing of MIG and during MIG testing to ensure the required rise of cathode surface temperature for pre-set heater power.

Research on Particle Flow Erosion Precision Electroforming Technology

2013 ◽  
Vol 771 ◽  
pp. 75-81
Author(s):  
Nai Chang Dai ◽  
Sheng Dong Yu
Keyword(s):  
Mechanical Property ◽  
Glass Bead ◽  
Cathode Surface ◽  
Special Functions ◽  
Particle Flow ◽  
Metallic Nickel ◽  
Microscopic Structure ◽  
Huge Amount ◽  
Deposit Surface ◽  
Particle Flows

t is possible to get electroforming deposit with numerous special functions by adoption of traditional electroforming technique, but in which there are defects such as uneven electroforming deposit and unstable performance, etc. In order to enhance the quality and speed of electroforming deposit, this article has proposed the particle flow erosion precision electroforming technology, particle flows such as huge amount of micro glass bead is used in the process of electro-deposit for erosion of electroforming deposit surface, so that micro glass beads continuously abrade and impact cathode surface. As indicated in electroforming test of metallic nickel, in comparison with traditional electroforming technology, particle flow erosion precision electroforming technology can effectively change the microscopic structure of electroforming deposit, refine grain and realize evener distribution of grains, so as to reduce the diffracted intensity of all crystal faces and enhance mechanical property of electroforming deposit.

Temporal structure of the fast electron beam generated in the pseudospark discharge with external triggering

2005 ◽  
Vol 33 (5) ◽  
pp. 1648-1653 ◽  
Author(s):  
Y.D. Korolev ◽  
O.B. Frants ◽  
V.G. Geyman ◽  
N.V. Landl ◽  
R.V. Ivashov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fast Electron ◽  
Temporal Structure ◽  
Pseudospark Discharge ◽  
Fast Electron Beam
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