The Composite Materials for High Erosion Resistance Coatings Applied in Power Industry

2016 ◽  
Vol 246 ◽  
pp. 127-130
Author(s):  
Bożena Szczucka-Lasota ◽  
Krzysztof Szymański ◽  
Jan Piwnik
Keyword(s):  
Composite Materials ◽  
Erosion Resistance ◽  
Protective Coatings ◽  
Thermal Spraying ◽  
Innovative Technology ◽  
Power Plant Boiler ◽  
Corrosion Resistant Coatings ◽  
Spraying Process ◽  
Spraying Method ◽  
Plant Boiler

The article presents the issues related to composite materials and the fabrication process of protective coatings by thermal spraying methods used for the protection of power plant boiler elements . The basic composite materials for thermal spraying process were characterized. The presented materials allow produced the erosion-corrosion resistant coatings. The chemical composition, phase structure and properties of the selected materials are presented. The basic group of coatings with the high corrosion and erosion resistance are produced by thermal spraying method, like HVOF (High velocity oxy fuel). In this article the selected properties of composite materials sprayed by innovative technology are characterized.

New Powdered Silicide Materials for Thermal Spraying Process and Coatings on the Niobium Base Alloys

1998 ◽  
Author(s):  
V. Terentieva ◽  
O. Bogatchkova ◽  
D. Cornu
Keyword(s):  
Protective Coating ◽  
Protective Coatings ◽  
Thermal Spraying ◽  
Base Material ◽  
Theory And Practice ◽  
Powder Materials ◽  
Self Healing ◽  
High Enthalpy ◽  
Boride Phases ◽  
Spraying Process

Abstract The given article presents some results of the scientific research devoted to the development of a new class of scale-resistant powder materials of the Si-Ti-Mo-B system for thermal spraying and using these materials for the creation of heat-resistant coatings on the niobium base alloys by means of various methods of thermal spraying. Also under consideration are problems relating to the theory and practice of obtaining reliable protective coatings on high-melting metals and their alloys, niobium ones included, intended for operation in high-enthalpy oxygen-containing gas flows. Hazard in commencing an oxidation reaction of the base material under coating is connected with density of open pores and cracks, and partial pressure of the oxidizer. Powdered multicomponent heterophase materials for gas-thermal spraying of protective coating with a self-healing ability and controlled properties are proposed. Finally the results of some properties of new silicide-type heterophase powders containing silicide and boride phases for a thermal spraying process and some properties of protective coating deposited on the niobium base alloys by means of a thermal spraying technique are presented.

scholarly journals Structure and Selected Properties of Arc Sprayed Coatings Containing In-Situ Fabricated Fe-Al Intermetallic Phases

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1059 ◽  
Author(s):  
Tomasz Chmielewski ◽  
Piotr Siwek ◽  
Marcin Chmielewski ◽  
Anna Piątkowska ◽  
Agnieszka Grabias ◽  
...  
Keyword(s):  
Protective Coatings ◽  
Composite Coatings ◽  
Thermal Spraying ◽  
Intermetallic Phases ◽  
Arc Spraying ◽  
Coating Materials ◽  
Two Phases ◽  
Sprayed Coatings ◽  
Spraying Process

The paper presents the results of research on the production by means of arc spraying of composite coatings from the Fe-Al system with participation of in-situ intermetallic phases. The arc spraying process was carried out by simultaneously melting two different electrode wires, aluminum and steel. The aim of the research is to create protective coatings with a composite structure with a significant participation of FexAly as an intermetallic phases reinforcement. The synthesis of intermetallic phases takes place during the (in-situ) spraying process. Currently most coatings involving intermetallic phases are manufactured by different thermal spraying methods using coating materials in the form of prefabricated powders containing intermetallic phases. The obtained results showed the local occurrence of intermetallic phases from the Fe-Al system, and the dominant components of the structure have two phases, aluminum solid solutions in iron and iron in aluminum. The participation of intermetallic phases in the coating is relatively low, but its effect on the properties of the coating material is significant.

scholarly journals Selected Parameters of Micro-Jet Cooling Gases in Hybrid Spraying Process

2016 ◽  
Vol 61 (2) ◽  
pp. 621-624 ◽  
Author(s):  
B. Szczucka-Lasota ◽  
T. Węgrzyn ◽  
Z. Stanik ◽  
J. Piwnik ◽  
P. Sidun
Keyword(s):  
Thermal Stress ◽  
Thermal Spraying ◽  
Innovative Technology ◽  
High Velocity Oxygen Fuel ◽  
Jet Cooling ◽  
Structure Of Coatings ◽  
The Relationship ◽  
Oxygen Fuel ◽  
Spraying Process

Abstract The innovative technology, like thermal spraying with a micro-jet cooling is one of the important modification of classical ultrasonic spraying methods. Using of micro-stream with gases like argon or nitrogen allows to cool the coating immediately after spraying, and thereby reduce the time of transition during the injection of each layer. As a result of the process, the fine dispersive structure of coatings is obtained during the shorter time in comparable to the classical high velocity oxygen fuel process (HVOF). The parameter of process and the type of stream equipment determine the quality of the obtained structure and thermal stress in the coating. The article presents the relationship between selected parameters of hybrid process and properties of the coatings. The presented technology should be adapted to the actual production of protective coating for machines and construction working in wear conditions.

scholarly journals Innovation in the Process of Thermal Spraying Coatings

2016 ◽  
Vol 61 (3) ◽  
pp. 1431-1436
Author(s):  
B. Szczucka-Lasota
Keyword(s):  
New Technology ◽  
Thermal Spraying ◽  
Experimental Investigations ◽  
Technology Process ◽  
Lower Porosity ◽  
Selective Cooling ◽  
The Subject ◽  
Spraying Process ◽  
Spraying Method

AbstractIn this paper, the hybrid method connects the ultrasonic spraying method with a injector of complex cooling micro-jet system is presented. The use of properly constructed injector allows for local and selective cooling of the coating structure immediately after spraying process. The construction of injector is the subject of patent in Polen. The presented new technology gives practical possibility of control of coatings structure. This is the kind of positive feedback between the technology process and obtained product (the quality of the process increases the quality of the final product). The initial experimental investigations, presented in this paper, show, that the obtained coatings structure is: fine-dispersion of the grain, with a lower porosity, good compactness and adhesion to the substrate.

scholarly journals INVESTIGATION OF METHODS OF PROTECTIVE COATINGS APPLICATION ON THE ROTOR OF DOWNHOLE DRILLING MOTOR

2016 ◽  
pp. 47-51
Author(s):  
D. D. Vodorezov ◽  
S. A. Frolov ◽  
V. N. Svetashov ◽  
D. S. Leontiev ◽  
O. M. Stolbova
Keyword(s):  
Protective Coatings ◽  
Thermal Spraying ◽  
Laser Melting ◽  
Spraying Method

The article describes the methods of applying of protective coatings to the rotor of downhole drilling motors. The analysis of the effectiveness of methods of applying of protective coatingswas carried out. The article shows that the transition to gas-thermal spraying method with laser melting allows to achieve high technical and technological results in comparison with other methods.

Numerical Investigation on Particle Velocity in Cold Spraying of Hydroxyapatite Coating

2011 ◽  
Vol 188 ◽  
pp. 717-722 ◽  
Author(s):  
Lei Zhang ◽  
Wen Tao Zhang
Keyword(s):  
Particle Acceleration ◽  
Particle Velocity ◽  
Thermal Spraying ◽  
Cold Spraying ◽  
Nozzle Geometry ◽  
Metallic Implants ◽  
Ha Coating ◽  
Computational Fluid Dynamics Cfd ◽  
Spraying Process ◽  
Spraying Method

Hydroxyapatite (HA) is a calcium phosphate ceramics and HA coating is essential for the medical metallic implants. This paper presents a novel cold spraying method for the formation of HA coatings instead of the commonly used thermal spraying method. The HA particle velocity in the cold spraying process is investigated numerically using a computational fluid dynamics (CFD) program, FLUENT. Stress is laid on how the geometric parameters of the nozzle and the process parameters influence the particle velocity. A Taguchi’s orthogonal array is employed to arrange the simulation conditions and the simulation results are analyzed by analysis of variance (ANOVA) method to reveal the main factors influencing HA particle acceleration significantly. The changes of the HA particle velocity under different cold spraying conditions are simulated to clarify the effects of the nozzle geometry, accelerating gas condition and property of particle itself on HA particle acceleration.

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