RESEARCH OF PROPERTIES OF SPRAYED COATINGS ON THE ALUMINIUM ALLOYS / ALIUMINIO LYDINIŲ PLAZMINIO PURŠKIMO TYRIMAS

In article the cathodic cleaning processes of aluminum alloyAW 5754 and cleaned substrate surface coating by plasmawith Ni-Cr-Fe-Si powder were researched. Aluminium substrateroughness after cathodic treatment at different cathodic treatmentparameters was established during the experiments. During theinvestigation a comparison of the calculated medium power1.6 to 9 kW plasma torch voltage-current characteristics withthe experimental results was made. The optimized parametersof aluminium cathode substrate cleaning process were selected;porosity and morphology of plasma sprayed nickel-based coatingwere determined. Santrauka Straipsnyje nagrinėjami aliuminio lydinio AW 5754 katodinio valymo procesai ir nuvalyto substrato paviršiaus dengimas plazminiu būdu Ni-Cr-Si-Fe danga. Eksperimentinių bandymų metu nustatytas aliuminio substrato šiurkštumas po katodinio valymo, esant skirtingiems katodinio valymo parametrams. Tyrimo metu buvo palygintos apskaičiuotos vidutinės galios 1,6–9 kW plazmotrono voltamperinės charakteristikos su eksperimentiniais rezultatais. Parinkti aliuminio substrato optimalūs katodinio valymo proceso parametrai ir nustatytas plazminiu būdu užpurkštos nikelio pagrindo dangos porėtumas ir morfologija.

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Wear Properties of WC/Co Coatings with Plasma and High Velocity Oxyfuel Spraying

Thermal Spray 1998: Proceedings from the International Thermal Spray Conference ◽

10.31399/asm.cp.itsc1998p0281 ◽

1998 ◽

Author(s):

T. Akasawa ◽

K. Ai

Keyword(s):

High Velocity ◽

Material Removal ◽

Sliding Wear ◽

Substrate Surface ◽

Wear Properties ◽

Hvof Spraying ◽

Plasma Sprayed Coatings ◽

Plasma Sprayed ◽

Steel Substrates ◽

Sprayed Coatings

Abstract A tungsten carbide/cobalt hard coating was deposited on steel substrates using plasma-arc and high velocity oxyfuel flame (HVOF) spraying. The characteristics of the coatings made by the two spraying methods were evaluated under identical conditions. The microstructure and the chemical composition ofthe coatings were different depending on the powderheating temperature and the velocity of particles. The sliding wear properties of the coatings against hardened steel at high sliding speeds showed different tendencies from those at low speeds. The plasma sprayed coatings resulted in better abrasive wear properties than HVOF coatings did. Material removal by solid particle erosion depended on the striking angle ofparticles on the substrate surface but there are no clear differences in wear properties between the two coatings.

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Influence of Preheating Temperature on the Quality of the Interface between Plasma Sprayed Coatings and Substrate

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.606.183 ◽

2014 ◽

Vol 606 ◽

pp. 183-186

Author(s):

Monika Vilémová ◽

Barbara Nevrlá ◽

Jiří Matějíček ◽

Radek Mušálek

Keyword(s):

Stainless Steel ◽

Plasma Torch ◽

Water Stabilized Plasma ◽

Preheating Temperature ◽

Substrate Preheating ◽

Plasma Sprayed Coatings ◽

Plasma Sprayed ◽

Steel Substrates ◽

Sprayed Coatings

This study was aimed to investigate the effect of the substrate preheating temperature on the overall quality of the coating/substrate interface. The coatings (stainless steel) were deposited using a water stabilized plasma torch (Institute of Plasma Physics, Prague, i.e. IPP, Czech Republic) on steel substrates. Three sets of samples were prepared under identical spraying and grit blasting condition; substrate preheating temperature was the only parameter which was varied, i.e. preheating to 150°C, 250°C and 350°C. Higher preheating temperature led to a significant increase in the coating adhesion.

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Thermal And Chemical Resistance Of Plasma Sprayed Al2o3, Al2o3-Tio2 Coatings

10.21203/rs.3.rs-18422/v2 ◽

2020 ◽

Author(s):

Airingas Šuopys ◽

Liutauras Marcinauskas ◽

Romualdas Kėželis ◽

Mindaugas Aikas ◽

Rolandas Uscila ◽

...

Keyword(s):

Heat Treatment ◽

Stainless Steel ◽

Atmospheric Pressure ◽

Plasma Torch ◽

Chemical Resistance ◽

Hydrogen Plasma ◽

Manufacturing Cost ◽

Direct Current Plasma ◽

Plasma Sprayed ◽

Sprayed Coatings

Abstract In this article, the results of thermal and chemical resistance, of plasma sprayed Al2O3 and Al2O3-13wt.TiO2 coatings on a steel (P265GH) sample are presented. Coatings were formed using air-hydrogen plasma direct current plasma torch at atmospheric pressure. The resistance of coatings was measured by analyzing surface structure, elemental and phase composition of as sprayed coatings and after several heating cycles, imitating application conditions. To make this technology more appealing, by decreasing exploitation cost of standard cast iron grate used in straw pellet broilers, we used cheaper stainless steel with a protective Al2O3 and Al2O3-13wt.% TiO2 coatings. Most of the research done in this field is by using Ar as primary gas, but to decrease the manufacturing cost even further we used Air as primary gas. It was determined that after heat treatment the minor changes in the elemental composition were observed. Meanwhile an additional crystalline phases of metal oxides were detected.

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Thermal And Chemical Resistance Of Plasma Sprayed Al2o3, Al2o3-Tio2 Coatings

10.21203/rs.3.rs-18422/v1 ◽

2020 ◽

Author(s):

Airingas Šuopys ◽

Liutauras Marcinauskas ◽

Romualdas Kėželis ◽

Mindaugas Aikas ◽

Rolandas Uscila

Keyword(s):

Heat Treatment ◽

Stainless Steel ◽

Atmospheric Pressure ◽

Plasma Torch ◽

Chemical Resistance ◽

Hydrogen Plasma ◽

Manufacturing Cost ◽

Direct Current Plasma ◽

Plasma Sprayed ◽

Sprayed Coatings

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On growth of suspension plasma-sprayed coatings deposited by high-enthalpy plasma torch

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2019.01.084 ◽

2019 ◽

Vol 371 ◽

pp. 333-343 ◽

Cited By ~ 5

Author(s):

Tomas Tesar ◽

Radek Musalek ◽

Jan Medricky ◽

Jan Cizek

Keyword(s):

Plasma Torch ◽

High Enthalpy ◽

Plasma Sprayed Coatings ◽

Plasma Sprayed ◽

Sprayed Coatings

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Electron microscopy studies of plasma-sprayed materials

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100074276 ◽

1983 ◽

Vol 41 ◽

pp. 70-71

Author(s):

K.R. Subramanian ◽

A.H. King ◽

H. Herman

Keyword(s):

Plasma Spraying ◽

Substrate Surface ◽

Flame Temperature ◽

Ceramic Coatings ◽

Metallic Substrates ◽

Hot Plasma ◽

Almost All ◽

Plasma Sprayed ◽

Hostile Environments ◽

Plasma Spraying Process

Plasma spraying is a technique which is used to apply coatings to metallic substrates for a variety of purposes, including hardfacing, corrosion resistance and thermal barrier applications. Almost all of the applications of this somewhat esoteric fabrication technique involve materials in hostile environments and the integrity of the coatings is of paramount importance: the effects of process variables on such properties as adhesive strength, cohesive strength and hardness of the substrate/coating system, however, are poorly understood.Briefly, the plasma spraying process involves forming a hot plasma jet with a maximum flame temperature of approximately 20,000K and a gas velocity of about 40m/s. Into this jet the coating material is injected, in powder form, so it is heated and projected at the substrate surface. Relatively thick metallic or ceramic coatings may be speedily built up using this technique.

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