Sensor information processing in the control of quality parameters of functional coatings of products deposited by vacuum-arc spraying

2021 ◽  
Author(s):  
Sergey N. Grigoriev ◽  
Mars S. Migranov ◽  
Semen R. Shekhtman ◽  
Artur M. Migranov ◽  
Artem A. Ershov ◽  
...  
Keyword(s):  
Information Processing ◽  
Quality Parameters ◽  
Vacuum Arc ◽  
Arc Spraying ◽  
Functional Coatings ◽  
Sensor Information

Deposition of a multi-layer coating in a gas-metal beam-plasma formation at low pressure

2021 ◽  
Vol 64 (1) ◽  
pp. 125-129
Author(s):  
V.V. Denisov ◽  
◽  
Yu.A. Denisova ◽  
E.L. Vardanyan ◽  
E.V. Ostroverkhov ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Hollow Cathode ◽  
Multilayer Coating ◽  
Low Pressure ◽  
Plasma Formation ◽  
Vacuum Arc ◽  
Arc Spraying ◽  
Arc Plasma ◽  
Functional Coatings ◽  
Beam Plasma

The vacuum-arc plasma-assisted method was used to deposit a multilayer coating based on Ti and Al in two discharge systems - in a traditional plasma-assisted vacuum-arc spraying system and in a system for generating of gas-metal beam-plasma formation formed in a hollow cathode of a non-self-sustained low pressure glow discharge. The coatings obtained in the investigated discharge schemes are close in elemental and phase composition. In the coating deposited in the plasma-beam formation, the aluminum content is 8% lower, which is probably due to the overall higher average value of the ion flux density on the surface of the growing film in a non-self-sustained glow discharge. In the coating obtained by sputtering in a beam-plasma formation, there are no elements that are part of the material of the sputtered hollow cathode. Gas-metal beam-plasma formations, formed at low pressure, are promising in the processes of functional coatings deposition by the vacuum-arc plasma-assisted method.

RECENT DEVELOPMENTS IN VACUUM ARC SPRAYING

1992 ◽  
Vol 7 (4) ◽  
pp. 573-591 ◽  
Author(s):  
H.-D. Steffens ◽  
M. Wewel
Keyword(s):  
Vacuum Arc ◽  
Arc Spraying ◽  
Recent Developments

Method and algorithms of complex information processing onboard the aircraft for the benefit of definition of accessory of the purposes

2021 ◽  
Author(s):  
А.V. Avramov
Keyword(s):  
Information Processing ◽  
Information Environment ◽  
Complex Information ◽  
Equipment Complex ◽  
Phase Coordinates ◽  
Complex Information Processing ◽  
Adaptive Assessment ◽  
Complex Adaptive ◽  
Sensor Information ◽  
Onboard Equipment

Formulation of the problem. On board an aircraft, the solution of situational awareness tasks can be achieved as a result of the creation of an integrated multi-sensor information environment for a complex of onboard equipment, including sources of information that are heterogeneous in terms of construction principles and nature. One of the difficulties in creating such a multi-sensor information environment is the lack of specialized functional software for the on-board equipment complex, which allows processing and combining signals and information from heterogeneous sources, providing an assessment of the coordinate characteristics of targets in the form of phase coordinates of their spatial position and movement, as well as recognition and identification observed targets by characteristic features. To solve this problem, a method and interconnected algorithms for complex information processing have been developed that would allow combining heterogeneous information about targets, taking into account the conditions and methods of obtaining it when solving problems of tracking, recognition and identification of targets. Goal. Describe the method and interrelated algorithms for integrated information processing in the aircraft onboard equipment complex, which provide tracking, recognition and identification of targets based on information received from heterogeneous OBE sources. Results. The method of complex information processing on board the aircraft is described. A set of interrelated algorithms has been developed, including: an algorithm for the complex adaptive assessment of the phase coordinates of the observed target, conditional relative to its trajectory and signal signs obtained from the results of observations of heterogeneous sources; an algorithm for determining the nationality of the observed target, taking into account the assessment of its class / type based on the results of assessing the values of its trajectory and signal characteristics, as well as the conditions for assessing the phase coordinates. Practical significance. The optimization of the processes of a complex adaptive assessment of the phase coordinates of the observed target, conditional with respect to its trajectory and signal signs, and optimization of the decision-making process about the nationality of the observed target, taking into account the assessment of its class / type based on the values of the trajectory and signal signs of this target, obtained from the results of observations of heterogeneous sources. A variant of the practical implementation of the developed method and algorithms in the OBE of the aircraft is proposed.

Repair of Water Turbine Blades by Wire Electric Arc Spraying

1996 ◽  
Author(s):  
J. Musil ◽  
V. Dolhof ◽  
E. Dvorácek
Keyword(s):  
Stainless Steel ◽  
Turbine Blades ◽  
Electric Arc ◽  
Francis Turbine ◽  
Arc Spraying ◽  
Original Material ◽  
Functional Coatings ◽  
Functional Coating ◽  
Water Turbine ◽  
Stainless Steel Coatings

Abstract Water turbine parts damaged by cavitation erosion (CE) and/or slurry erosion (SE) may cause excessive operational costs for plants worldwide. The damages can be reduced by choosing more resistant materials and right technology in the first-production or at repair and overhaul. Thermal spray technologies have a great potential in the field of repairing works. Thick multilayered coatings deposited by wire electric arc spraying (WAS) has been developed and applied as CE and SE protection at the repair of stationary Francis turbine blades. Repair technology by WAS was performed on large eroded areas (1-3 m3) of preguide blades of Francis turbine: 1) local damaged depths 30-35 mm maximum were repaired by sprayed materials, 2) subsequently wire arc spraying of functional coating was applied. Three types of functional coatings with total thickness 10 mm a) duplex high - Cr stainless steel with NiAl bond coat, b) graded NiAl - Cr stainless steel coatings, and c) multilayered graded NiAl - Cr stainless steel coatings were compared by means of stress measurements and structural analysis. The coating structure influences very strongly the residual stress level and adhesive-cohesive strength. Multilayered graded NiAl - Cr stainless steel coatings showed the best results and were sprayed on water turbine blades in 4 Czech water power station during regular cut-off repair periods. After 30 - 36 months' continuous operation, Francis turbine blades repaired by WAS technology show better behaviour in comparison with original material from the point of wear resistance, reliability, cost-effect and life-time.

scholarly journals The influence of magnetic field on the rate of cathode erosion at vacuum arc spraying

2017 ◽  
Vol 255 ◽  
pp. 012007
Author(s):  
I V Karpov ◽  
A V Ushakov ◽  
A A Lepeshev ◽  
L Yu Fedorov ◽  
E A Dorozhkina ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Vacuum Arc ◽  
Arc Spraying ◽  
Cathode Erosion
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