Reactive plasma spraying of wear-resistant coatings

“…The expression above allows for the estimation of required particle acceleration velocity for more moderate heating of particles to prevent undesirable physicochemical transformations. The development of plasma spraying and supersonic flame spraying of coatings has been reported ( Ref 11,[31][32][33][34][35][36]39,[41][42][43][44][45][46][47][48][49][50][51][52][53], and the properties of the coatings produced by these methods are comparable with those of detonation coatings. The HVOF processes similar to the D-gun spraying are based on high-pressure combustion.…”

Section: Introductionmentioning

confidence: 78%

“…In general, for the D-gun spraying process one employs powders which are bigger in size than the ones used in the plasma spraying or HVOF processes ( Ref 4,29,34,[38][39][40][41][48][49][50][51][52]. This results from the character of the D-gun process (relatively low temperature and high kinetic energy of powder particles).…”

Section: Introductionmentioning

confidence: 99%

“…As far as plasma spraying is concerned, there are much data available that deal with the velocity and droplet temperature study as well as dynamics of structure splats evolution during plasma spraying ( Ref 25,[31][32][33][34][35][48][49][50][51][52]. Plasma spraying is a high temperature and velocity version of thermal spraying technique, in which material is melted in a hot plasma jet and the melt is accelerated toward a substrate, where it rapidly solidifies.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Detonation Gun Spraying Conditions on the Quality of Fe-Al Intermetallic Protective Coatings in the Presence of NiAl and NiCr Interlayers

Senderowski

Bojar

2009

J Therm Spray Tech

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The paper presents results of detailed research of the application of detonation gun (D-gun) spraying process for deposition of Fe-Al intermetallic coatings in the presence of NiAl and NiCr interlayers. A number of D-gun experiments have been carried out with significant changes in spraying parameters which define the process energy levels (changes in volumes of the working and fuel gases, and the distance and frequency of spraying). These changes directly influenced the quality of the coatings. The initial results underlay the choice of the process parameters with the view to obtain the most advantageous of geometric and physical-mechanical properties of the coating material, interlayer and substrate. The metallurgical quality of the coatings was considered by taking into account grain morphology, the inhomogeneity of chemical content and phase structure, the cohesive porosity in the coating volume, and adhesive porosity in the substrate/interlayer/coating boundaries. The surface roughness level was also considered. It was found that the D-gun sprayed coatings are in all cases built with flat lamellar splats. The splats develop from powder particles which are D-gun transformed in their plasticity and geometry. A significant result of the optimization of D-gun spraying parameters is the lack of signs of melting of the material (even in microareas) while the geometry of the subsequently deposited grains is considerably changed and the adhesivity and cohesion of the layers proves to be high. This is considered as an undeniable proof of high plasticity of the D-gun formed Fe-Al intermetallic coating.

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“…Building on the successful programs of its two predecessors, the Third International Conference on Spray Forming has already accepted more than 40 quality papers for presentation in Cardiff, Wales, on September [9][10][11]1996. Participation by virtually every major organization in the spray forming field is expected, and coverage will include the most current information on this rapidly growing technology that offers a low-cost, largescale manufacturing route for advanced alloys.…”

Section: The Third International Conference On Spray Forming -Icsf3mentioning

confidence: 99%

Thermal spraying II: Recent advances in thermal spray forming

Knight

1996

JOM

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Editor's Note: This article is the second in a two-part series on thermal spray processing. The first part, which covered processing, appeared in the August 1995 issue of JOMbeginning on page 32.Over the last 50 years, thermal spraying has evolved and is now capable of depositing free-standing materials onto mandrels at thicknesses exceeding 100 mm. Advances in processing (including high-velocity oxy-fuel, inert/chamber plasma spray, and improved powder compositions and morphologies) have combined to enable the successful implementation of thermal-spray forming for both monolithic and composite materials. This article, the second in a series on thermalspray processes, describes some of the recent advances in the application of thermal-spray forming.

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Reactive plasma spraying of wear-resistant coatings

Cited by 40 publications

References 3 publications

Coatings by Thermal Spray

Coatings by Thermal Spray

Influence of Detonation Gun Spraying Conditions on the Quality of Fe-Al Intermetallic Protective Coatings in the Presence of NiAl and NiCr Interlayers

Thermal spraying II: Recent advances in thermal spray forming

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