Droplets presence in tin hard coatings produced by arc plasma with varying process parameters

2001 ◽  
Author(s):  
M. Arroyave F.
Keyword(s):  
Process Parameters ◽  
Hard Coatings ◽  
Arc Plasma

Droplets Presence in Tin Hard Coatings Produced by Arc Plasma with Varying Process Parameters

2001 ◽  
Author(s):  
M. Arroyave F. ◽  
L. Alvarez M. ◽  
A. Devia C. ◽  
Hernán Chuaqui ◽  
Mario Favre
Keyword(s):  
Process Parameters ◽  
Hard Coatings ◽  
Arc Plasma

Fabrications of spherical alumina particles by controlling process parameters in a transferred arc plasma system

2020 ◽  
Vol 46 (13) ◽  
pp. 21225-21232
Author(s):  
Jungho Song ◽  
Byungkwon Kim ◽  
Dongho Park ◽  
Jung Hyeun Kim
Keyword(s):  
Process Parameters ◽  
Arc Plasma ◽  
Plasma System ◽  
Alumina Particles ◽  
Transferred Arc ◽  
Spherical Alumina

The Potential of Infrared Video Thermography for Control of Arc-Plasma Spray Fabrications

1987 ◽  
Vol 98 ◽  
Author(s):  
D. Harris ◽  
M. Kelly
Keyword(s):  
Process Control ◽  
Real Time ◽  
Process Parameters ◽  
Plasma Spray ◽  
Average Velocity ◽  
Plasma Plume ◽  
Plasma Jets ◽  
Time Process ◽  
Arc Plasma ◽  
Infrared Video

ABSTRACTInfrared video thermography was used to evaluate the plasma plume and particle streams created by dc plasma jets operating in air and spraying several types of materials. The temperatures of the plasma plume were measured with the aid of a graphite ‘witness.’ By using the thermography system in an 8khz line scan mode, we were able to obtain data relative to the average velocity of particle groups injected into the plasma. The effects of process parameters could be observed in real time using these methods, showing the potential for real time process control.

Caracteristics of TiN Coating Films for Large Sizes Prepared by Arc Ion Plating

2012 ◽  
Vol 706-709 ◽  
pp. 2589-2595
Author(s):  
Kyeong Cheol Baek ◽  
Chan Yeol Seo ◽  
Ki Bok Heo ◽  
Yang Soo Kim ◽  
Dong Joo Yoon ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Partial Pressure ◽  
Process Parameters ◽  
High Hardness ◽  
Hard Coatings ◽  
Tin Coating ◽  
Adhesion Properties ◽  
Arc Ion Plating ◽  
Ion Plating ◽  
Industrial Manufacture

Arc ion plating (AIP) is one of the most attractive physical vapour deposition (PVD) method for the industrial manufacture of TiN coatings, owing to a high degree of ionization in the target material and convenient control of the process parameters. The important characteristic of hard coating is the adhesion strength between the coating layer and the substrate. The coating will be subjected to various loads, such as mechanical, thermal load, etc., in practical applications. Therefore, for more than a decade, Ti-based hard coatings have been applied to tools, dies, and mechanical parts because of the enhance lifetime and performance. It is focus on the attractive properties such as high hardness, good wear, and chemical stability. In the present study, TiN monolayer film was prepared at various N2 partial pressures and current by the AIP technique in SACM645 material. The correlation between microstructure and properties of the TiN coating was comparatively investigated by XRD, FE-SEM and AFM. These study carried steadily out improve the adhesion properties and wear resistance of Ti-based coating using pre-treatment of the substrate, insertion of an interlayer, application of multi-layers and adjustment of the process parameters. The main phase FCC TiN displayed (200) orientation in the film with the highest N2partial pressure. The (111) orientation was observed with decreasing N2partial pressure. The (200) and (111) textures in the film which was treated 80A arc current were found to be competitive orientations, however stronger arc treated the (200) texture was increased. The multilayer TiN films has possessed high hardness (up to 42Nm) and the best wear resistance among the specimens. These features were attributed to the presence of dense microstructures that were mainly composed of TiN phase around 5.16㎛ thickness, HF1 adhesion and Ra 35㎚ surface roughness

Microstructural characterization of sol-gel coating on PET films

1994 ◽  
Vol 52 ◽  
pp. 886-887
Author(s):  
R. T. Chen ◽  
R.A. Norwood
Keyword(s):  
Ion Beam ◽  
Sol Gel ◽  
Industrial Applications ◽  
Hard Coatings ◽  
Nanometer Scale ◽  
Ion Beam Sputtering ◽  
Process Technology ◽  
Refractive Index Measurement ◽  
Organically Modified ◽  
Pet Films

Sol-gel processing has been used to control the structure of a material on a nanometer scale in preparing advanced ceramics and glasses. Film coating using the sol-gel process was also found to be a viable process technology in applications such as optical, porous, antireflection and hard coatings. In this study, organically modified silicate (Ormosil) coatings are applied to PET films for various industrial applications. Sol-gel materials are known to exhibit nanometer scale structures which havepreviously been characterized by small-angle X-ray scattering (SAXS), neutron scattering and light scattering. Imaging of the ultrafine sol-gel structures has also been performed using an ultrahigh resolution replica/TEM technique. The objective of this study was to evaluate the ultrafine structures inthe sol gel coatings using a direct imaging technique: atomic force microscopy (AFM). In addition, correlation of microstructures with processing parameters, coating density and other physical properties will be discussed.The materials evaluated are organically modified silicate coatings on PET film substrates. Refractive index measurement by the prism coupling method was used to assess density of the sol-gel coating.AFM imaging was performed on a Nanoscope III AFM (by Digital Instruments) using constant force mode. Solgel coating samples coated with a thin layer of Ft (by ion beam sputtering) were also examined by STM in order to confirm the structures observed in the contact type AFM. In addition, to compare the previous results, sol-gel powder samples were also prepared by ultrasonication followed by Pt/Au shadowing and examined using a JEOL 100CX TEM.

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