Analysis of the Transient Contact Resistance of Composite Copper-Graphite Material Obtained Using Plasma Spraying Technology

2021 ◽  
Vol 1022 ◽  
pp. 27-34
Author(s):  
Pavel Derevyankin ◽  
Vladimir Frolov
Keyword(s):  
Contact Resistance ◽  
Internal Structure ◽  
Plasma Spraying ◽  
Erosion Resistance ◽  
Graphite Powder ◽  
Copper Electrode ◽  
Structure And Properties ◽  
Transient Contact ◽  
Graphite Coating ◽  
Effect Of The Composition

The article is devoted to the analysis of the internal structure and properties of a copper-graphite coating applied to a copper electrode. The article provides a calculation of the transient contact resistance of electrodes with a coating obtained using plasma spraying technology. Copper-graphite powder with high arc resistance was used as a spraying substance. Coated electrodes were tested for erosion resistance by an arc at currents of several kiloamperes. The aim of the work is to determine the effect of the composition and internal structure of the coating on the transient processes in the contact gap.

Processes of the Foaming Mixture’ Components Interaction during the Foam Glass Synthesis

2020 ◽  
Vol 992 ◽  
pp. 271-276
Author(s):  
B.M. Goltsman ◽  
L.A. Yatsenko ◽  
Elena A. Yatsenko
Keyword(s):  
Porous Structure ◽  
Internal Structure ◽  
Foam Glass ◽  
Combustion Process ◽  
Structure And Properties ◽  
Stabilizing Agent

The prospects for the use of foam glass in construction were described. The modern compositions of foaming mixtures for foam glass synthesis were considered. Compositions for studying the influence of the foaming mixture components on the formation of foam glass porous structure were developed, their internal structure and properties were studied. The role of each component of the mixture on its foaming was revealed. Glycerol is a pore-forming agent, which decomposes and produces foaming gases. Waterglass is a stabilizing agent reducing glycerol combustion process. Recommendations on the application of the described patterns in the foam glass synthesis were given.

Internal structure and properties of Mars

Icarus ◽  
1977 ◽  
Vol 32 (1) ◽  
pp. 73-84 ◽  
Author(s):  
David H. Johnston ◽  
M.Nafi Toksöz
Keyword(s):  
Internal Structure ◽  
Structure And Properties

Effect of the composition of the liquid base on the structure and properties of plastic lubricants

1971 ◽  
Vol 7 (5) ◽  
pp. 355-358
Author(s):  
I. G. Fuks ◽  
I. P. Lukashevich ◽  
�. M. Uvarova ◽  
T. F. Lemesh ◽  
S. P. Rogov
Keyword(s):  
Structure And Properties ◽  
Plastic Lubricants ◽  
Effect Of The Composition

Effect of Plasma Gases on the Structure and Properties of WC-CrC-Ni Coatings

2015 ◽  
Vol 641 ◽  
pp. 105-110
Author(s):  
Maria Richert ◽  
Ilona Nejman ◽  
Marek Poręba ◽  
Jan Sieniawski ◽  
Łukasz Kuczek
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Plasma Spraying ◽  
Thermal Spray ◽  
Graphite Substrate ◽  
Structure And Properties ◽  
Porosity Of Coatings ◽  
Spraying Method ◽  
Scanning Electron

The effect of plasma gases (argon, helium) on the structure and properties of the WC-CrC-Ni coatings deposited at the graphite substrate has been investigated. The coatings were deposited by plasma spraying method in equipment Cham Pro –Thermal Spray Systems produced by Sulzer company. The microstructure of coatings were investigated by light microscopy (MO) and scanning electron microscopy (SEM). The performed investigations have been shown that with the increasing of amounts of argon and reducing volumes of helium and nitrogen, the microhardnees increased. The plasma gases also influenced on the porosity of coatings. Keywords: WC-CrC-Ni coatings, plasma spraying, microstructure, porosity Acknowledgement: The work was supported by project No INNOTECH – K2/IN2/9/181851/NCBR/13

scholarly journals METHODS OF STUDYING THE STRUCTURE AND PROPERTIES OF MOUNTAIN BREEDS ON SAMPLES (QUICK REVIEW)

2018 ◽  
pp. 10-20
Author(s):  
A. A. Karabutov ◽  
E. B. Cherepetskaya ◽  
A. N. Kravcov ◽  
M. Arrigoni
Keyword(s):  
Internal Structure ◽  
Acoustic Microscopy ◽  
Laser Ultrasound ◽  
Structure And Properties ◽  
X Ray ◽  
Local Porosity ◽  
Non Destructive ◽  
Tomography Scanning ◽  
Destructive Methods ◽  
Scanning Electron

Some non-destructive methods for controlling the internal structure of rocks are described and examples of their use are given. Examples of the use of X-ray and neural tomography, scanning electron and acoustic microscopy are also given. It is shown that the method of laser-ultrasound struktroskopii is promising. Two examples of the use of the latter are given: measuring the local porosity of samples of geomaterials and monitoring changes in the internal structure as a result of electromagnetic exposure.

Effect of Cryogenically Treated Electrode during AEDM of Nickel Based Super Alloy 718 for Surface Quality Improvement

2011 ◽  
Vol 410 ◽  
pp. 236-239 ◽  
Author(s):  
Anil Kumar ◽  
S. Maheshwari ◽  
C. Sharma
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Cryogenic Treatment ◽  
Graphite Powder ◽  
Sem Analysis ◽  
Copper Electrode ◽  
Dielectric Fluid ◽  
Machined Surface ◽  
Pulse On Time ◽  
Super Alloy

In this experimental study attempt has been made to realize potential of cryogenic treatment in enhancing surface quality with fine aluminum and graphite additives powders in AEDM of nickel based super alloy Inconel 718. L36(23x36) Orthogonal Array has been selected to conduct and analyze experiments based on Taguchi methodology. Polarity, peak current, pulse on time, duty cycle, gap voltage, retract distance, concentration of fine aluminum and graphite powder added into the dielectric fluid are chosen as input process variables to study performance in terms of surface roughness (SR) using copper and deep cryogenically treated copper electrode. It is found experimentally that deep cryogenically treated copper electrode with addition of 6g/l graphite powder improves surface roughness appreciably. The same has been supported by SEM analysis of the machined surface.

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