High Temperature Oxidation of HFPD Thermal-Sprayed MCrAlY Coatings in Simulated Gas Turbine Environments

Belzunce, F. J.; Higuera, V.; Poveda, S.; Carriles, A.

doi:10.1361/105996302770348592

Cited by 19 publications

(6 citation statements)

References 7 publications

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“…The oxidation kinetics of both coatings was characterized by parabolic rate constants, which are very close to those for the formation of aluminium oxide on nickel or cobalt based alloys [5]. The plasma carburized layers prevented surface plastic deformation and improved the wear resistance of the steel during the early stages of the wear process.…”

Section: Introductionmentioning

confidence: 69%

Improvement of High Temperature Wear Resistance of AISI 316 ASS through NiCrBSiCFe Plasma Spray Coating

Parthasarathi¹,

Duraiselvam²

2010

JMMCE

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Section: Introductionmentioning

confidence: 69%

Improvement of High Temperature Wear Resistance of AISI 316 ASS through NiCrBSiCFe Plasma Spray Coating

Parthasarathi¹,

Duraiselvam²

2010

JMMCE

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“…Among the main directions for solving the problem of improving the quality of coatings, identified in the resources of the world scientific periodicals, a number of publications can be distinguished that consider the promising use of compressed air + carbon containing gas mixtures [5,6]. This introduces additional heat during the combustion of the mixture, reduces the supply of oxygen to the metal droplets during the reducing nature of the gas jet.…”

Section: Research Of Existing Solutions To the Problemmentioning

confidence: 99%

Use of pulsed spray airflow for electric arc spraying of different types of wires

Royanov¹,

Zakharova²

2021

TAPR

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The object of research is the control of the process of formation of a spraying air flow and the transfer of particles of liquid metal from electrodes during arc spraying. One of the problem areas of the arc spraying process is the oxidation of the sprayed metal particles by the oxygen of the air flow during their transportation to the sprayed surface. This leads to the formation of a sufficiently large amount of oxides of chemical elements, which significantly deteriorate the adhesion strength and burn out alloying elements that are necessary to obtain a wear-resistant and corrosion-resistant coating. The suitability and durability of coatings during use depends on the strength of adhesion to the substrate. In the course of the study, methods were used to determine the adhesion strength of the coating to the base – the Steffens method and methods for studying the microstructure of coatings were taken as the basis. The data was processed and dependencies were plotted. The proposed method makes it possible to improve the quality of the resulting coating in terms of such an indicator as improvements in chemical composition. And also to influence the chemical composition by controlling the process of transfer of molten metal using a pulsating air flow. The obtained results of approbation of the method allow us to consider it effective, as evidenced by the quality of the obtained coatings. This is due to the fact that the correctness of the formulation and solution of the problem provided adequate results. In contrast to the existing methods, the proposed one makes it possible to significantly influence the amount of harmful oxygen involved in the formation of a sprayed coating, which makes it possible to obtain a sprayed layer with the required performance characteristics. And also allows to improve its quality without significant capital costs. In addition, the issues of resource and energy saving are being addressed, since the burnout of chemical elements decreases and the air consumption during arc metallization decreases. To solve this problem, a simple design of the pulsator is proposed, which provides the ability to control the spray flow by adjusting the level of overlapping of the holes.

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“…The powder material injected in the middle of the barrel is then accelerated and heated and, in most cases, melted (Davis, 2004;Tucker, 2013;Fauchais et al, 2014). A new process called high-frequency pulse detonation using aerodynamic valves producing discrete batches of explosive gases and powders for each cycle allows spray frequencies over 60 Hz (Belzunce et al, 2002). They depend strongly on the combustible gas mixture composition and also on pressure.…”

Section: Detonation Gunmentioning

confidence: 99%

Current status and future directions of thermal spray coatings and techniques

Fauchais¹

2015

Future Development of Thermal Spray Coatings

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High Temperature Oxidation of HFPD Thermal-Sprayed MCrAlY Coatings in Simulated Gas Turbine Environments

Cited by 19 publications

References 7 publications

Improvement of High Temperature Wear Resistance of AISI 316 ASS through NiCrBSiCFe Plasma Spray Coating

Improvement of High Temperature Wear Resistance of AISI 316 ASS through NiCrBSiCFe Plasma Spray Coating

Use of pulsed spray airflow for electric arc spraying of different types of wires

Current status and future directions of thermal spray coatings and techniques

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