Surface Roughness and Part Dimensional Accuracy after Deposition of Coating by Vacuum Arc Plasma

2015 ◽  
Vol 799-800 ◽  
pp. 423-427
Author(s):  
Vladimir Vasilyevich Budilov ◽  
Viktor Sergeevich Mukhin ◽  
Ilgiz Irekovich Yagafarov ◽  
Kamil Nurullaevich Ramazanov
Keyword(s):  
Surface Roughness ◽  
Coating Thickness ◽  
Arc Discharge ◽  
Thickness Distribution ◽  
Vacuum Arc ◽  
Arc Plasma ◽  
Distribution Law ◽  
Form Accuracy ◽  
Coating Deposition ◽  
The Impact

Nitride coatings were deposited by vacuum arc plasma, in an atmosphere of argon and nitrogen using different deposition conditions of part location and configuration, angle between plasma flow and processing surface. The coating thickness, part dimensions and surface roughness were measured before and after coating deposition. The type of part poor shape precision after coating deposition by vacuum arc plasma was defined. An impact of coating deposition by vacuum arc discharge on the part dimensional and form accuracy was revealed. The effect of parts location on dimensional and radial surfaces form accuracy was induced. The effect of coating surface polythickness on part dimensional and form accuracy for parts with different stiffness was defined. The impact of part location area and parts quantity on coating thickness, surface roughness, dimensional and form accuracy of part was revealed. The coating thickness distribution law, parts quality class and accuracy degree after vacuum ion plasma coating deposition were assigned.

Influence of a Thermal Barrier Coating on the Performance of a Turboprop Engine

1992 ◽  
Author(s):  
J. D. MacLeod ◽  
J. C. G. Laflamme
Keyword(s):  
Surface Roughness ◽  
Thermal Barrier Coating ◽  
Coating Thickness ◽  
Ceramic Coating ◽  
National Research Council ◽  
Engine Performance ◽  
Thermal Barrier ◽  
Barrier Coating ◽  
Project Objectives ◽  
The Impact

Under the sponsorship of the Canadian Department of National Defence, the Engine Laboratory of the National Research Council of Canada has evaluated the influence of applying a thermal barrier coating on the performance of a gas turbine engine. The effort is aimed at quantifying the performance effects of a particular ceramic coating on the first stage turbine vanes. The long term objective of the program is to both assess the relative change in engine performance and compare against the claimed benefits of higher possible turbine inlet temperatures, longer time in service and increased time between overhauls. The engine used for this evaluation was the Allison T56 turboprop with the first stage turbine nozzles coated with the Chromalloy RT-33 ceramic coating. The issues addressed in testing this particular type of hot section coating were; 1) effect of coating thickness on nozzle effective flow area; 2) surface roughness influence on turbine efficiency; This paper describes the project objectives, the experimental installation, and the results of the performance evaluations. Discussed are performance variations due to coating thickness and surface roughness on engine performance characteristics. As the performance changes were small, a rigorous measurement uncertainty analysis is included. The coating application process, and the affected overhaul procedures are examined. The results of the pre- and post-coating turbine testing are presented, with a discussion of the impact on engine performance.

ELECTRICAL RESISTIVITY OF NANOSTRUCTURED PLATINUM AND GOLD THIN FILMS

2004 ◽  
Vol 11 (02) ◽  
pp. 223-227 ◽  
Author(s):  
M. C. SALVADORI ◽  
A. R. VAZ ◽  
R. J. C. FARIAS ◽  
M. CATTANI
Keyword(s):  
Experimental Data ◽  
Thin Films ◽  
Surface Roughness ◽  
Electrical Resistivity ◽  
Room Temperature ◽  
Theoretical Estimate ◽  
Vacuum Arc ◽  
Arc Plasma ◽  
Correlation Lengths ◽  
Gold Thin Films

We have measured, at room temperature, the resistivity, the surface roughness and the lateral surface correlation lengths of nanostructured platinum and gold thin films. The films' thickness d, deposited by vacuum arc plasma, is in the range 1.31≤d≤11.66 nm for platinum and 1.77≤d≤10.46 nm for gold. A theoretical estimate of our experimental data has been made.

Physico-Mechanical Properties of the Cr-C and Mo-C Coatings

2013 ◽  
Vol 750-752 ◽  
pp. 1959-1962
Author(s):  
Е.A. Stepanova ◽  
I.L. Pobol ◽  
J. Rajczyk
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Repetition Rate ◽  
Pulse Repetition Rate ◽  
Arc Discharge ◽  
Plasma Source ◽  
Pulse Repetition ◽  
Vacuum Arc ◽  
The Coefficient Of Friction ◽  
The Individual

The investigation of physico-mechanical properties of metal-carbon (Cr-C and Mo-C) coatings obtained using pulsed vacuum arc deposition has been carried out. Changing the arc discharge pulse repetition rate of the individual plasma sources equipped with metal and graphite cathodes allows significant varying of the composition, surface roughness and friction coefficient of the coatings. When reducing the pulse repetition rate in metal plasma source from 10 Hz to 5 Hz while retaining that constant in carbon source, the metal content in the coating can be decreased from 30 at.% to 2 at. % with increasing the surface roughness by a factor of 3.5. The tribological investigations of Cr-C and Mo-C coatings under the dry friction conditions showed the uniform adhesive wear of the coating upper layers. The coefficient of friction measured against steel counterbody was in the range of 0.08 to 0.1. However, in this case Mo-C coatings were more wear-resistant than Cr-C coatings.

The impact of precursor thickness and surface roughness on the power factor of Cu2ZnSnS4 (CZTS) at near room temperature: Spin-coating deposition

2021 ◽  
pp. 107091
Author(s):  
Hassan Ahmoum ◽  
Guojian Li ◽  
Mohd Sukor Su'ait ◽  
Mourad Boughrara ◽  
Puvaneswaran Chelvanathan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Power Factor ◽  
Spin Coating ◽  
Room Temperature ◽  
Coating Deposition ◽  
The Impact

Transformation of axial vacuum-arc plasma flows into radial streams and their use in coating deposition

1999 ◽  
Vol 27 (4) ◽  
pp. 1026-1029 ◽  
Author(s):  
I.I. Aksenov ◽  
V.M. Khoroshikh ◽  
N.S. Lomino ◽  
V.D. Ovcharenko ◽  
Y.A. Zadneprovskiy
Keyword(s):  
Vacuum Arc ◽  
Arc Plasma ◽  
Plasma Flows ◽  
Coating Deposition

Very Broad Metal Ion Beam Source for Ion Implantation and Coating Deposition Technologies

2014 ◽  
Vol 880 ◽  
pp. 288-291
Author(s):  
Igor Stepanov ◽  
Alexander Ryabchikov ◽  
Denis Sivin
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Metal Ion ◽  
Cathode Surface ◽  
Arc Discharge ◽  
Ion Beam ◽  
Vacuum Arc ◽  
Arc Plasma ◽  
Ion Emission

The paper describes high broad metal ion source based on dc macroparticle filtered vacuum arc plasma generation with the dc ion-beam extraction. The possibility of formation of pseudo ribbon beam of metal ions with the parameters: ion beam length 0.6 m, ion current up to 0.2 A, accelerating voltage 40 kV, and ion energy up to 160 kV has been demonstrated. The pseudo ribbon ion beam is formed from dc driven vacuum arc plasma. The results of investigation of the vacuum arc evaporator ion-emission properties are presented. The influence of magnetic field strength near the cathode surface on the arc spot movement and ion-emission properties of vacuum-arc discharge for different cathode materials are determined. It was shown that vacuum-arc discharge stability can be reached when the magnetic field strength ranges from 40 to 70 Gs on the cathode surface.

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