Properties of Cold Spray Nickel Based Coatings

Richer, P.; Jodoin, B.; Sansoucy, E.; Ajdelsztajn, L.; Kim, G.E.

doi:10.31399/asm.cp.itsc2006p0227

International Thermal Spray Conference

2006

DOI: 10.31399/asm.cp.itsc2006p0227

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Properties of Cold Spray Nickel Based Coatings

P. Richer

B. Jodoin

E. Sansoucy

et al.

Abstract: Nickel based alloys used in coating applications have been the focus of many studies, particularly in the aerospace industry. Their inherent corrosion and oxidation resistant properties have made them especially attractive for use as the metallic bond coat found in thermal barrier coating systems. Cold Spray is an emerging coating technology in which fine powder particles are accelerated in a supersonic flow and then deposited onto a substrate by means of plastic deformation. In this study, conventional CoNiCr… Show more

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“…In contrast for the majority of Fe-and Ni-base materials, dense coatings require higher temperature and velocities. Cold-sprayed nickel layers are used as base or intermediate layers and they are less expensive than electroplated coatings [67,68]. They are also used in induction heating coats on cooking appliances or cooking pots.…”

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Thermal and Cold Spray: Recent Developments

Fauchais

Montavon

2008

KEM

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Thermal spraying consists in a technology aiming at producing coatings whose thicknesses range from 10 μm to a few millimeters onto mechanical components to confer them specific and unique functional properties, such as wear and corrosion resistances, friction coefficient adaptation, thermal and electrical insulation, biocompatibility, repair, etc., among the principals. Thermal spraying consists in injecting in a viscous enthalpic jet (animated by a momentum) powder with particles which average size ranges from 0.01 to 100 μm. These particles are melted and simultaneously accelerated towards the surface of the part to be covered. They form, after impact, spreading and solidification, near-circular lamellae the stacking of which form the coating. Due to the versatility of the available processes exhibiting a wide range of enthalpic and momentum contents, virtually any kind of material exhibiting congruent melting behavior can be processed, from alloys and ceramics to polymers, ever since its melting temperature differs from its vaporization or decomposition temperature by at least 300 K and that it can be processed previously under the form of powder particles or wires. Thermal spray techniques offer the unique capability to manufacture a large variety of coatings on components of a large variety and geometry. However, thermal spraying constitutes a special process for which the coating service properties derive mostly from the structure and indirectly from the selection of the operating parameters. Very significant improvements over the past years permitted to diagnose the in-flight particle characteristics, mostly in terms of velocity and temperature. Recently, these new capabilities have made possible the development of on-line process controls. This should participate to a drastic increase in coating reliability. In convetntional thermal spraying processes, a pulverulent feedstock (i.e., powder particles) is injected within the plasma jet via a carrier gas. This approach does not permit to process small diameter particles; i.e., nano-sized particles, which could permit to form finely grained coatings. Replacing gas by liquid to carry particles offer the unique possibility to process nano-sized particles. Cold gas spraying may appear as an alternative process to reach the same goal. Indeed, thermal spray processes experienced very significant developments over the past years, opening new doors to manufacture coatings with a high reliability and superior properties. This papepr indend at presenting some of those developments.

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Thermal and Cold Spray: Recent Developments

Fauchais

Montavon

2008

KEM

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The Oxidation Behavior of TBC with Cold Spray CoNiCrAlY Bond Coat

Chen

Irissou²,

et al. 2010

J Therm Spray Tech

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Cold gas dynamic spray (CGDS) has been considered a potential technique to produce the metallic bond coat for TBC applications, because of its fast deposition rate and low deposition temperature. This article presents the influence of spray processes for bond coat, including air plasma spray, high velocity oxy-fuel, and in particular CGDS, on the oxidation performance of TBCs with a Co-32Ni-21Cr-8Al-0.5Y (wt.%) bond coat and an air plasma sprayed topcoat. Oxidation behavior of the TBCs was evaluated by examining the coating microstructural evolution, TGO growth behavior, and crack propagation during thermal exposure at 1050°C. The relationship between the TGO growth and crack propagation will be discussed.

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Numerical Simulation of Temperature Uniformity within Solid Particles in Cold Spray

Katanoda

2008

JMMP

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In the numerical simulation of temperature of particles traveling in the jet flow of cold spray, the particle temperature is usually assumed uniform. This assumption is valid for spray materials with larger thermal conductivity. For spray materials with smaller thermal conductivity, however, this assumption may not be valid. This paper numerically clarifies the spray conditions for which the assumption of the temperature uniformity of the particle is no longer valid in the cold spray.

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Properties of Cold Spray Nickel Based Coatings

Cited by 4 publications

References 0 publications

Thermal and Cold Spray: Recent Developments

Thermal and Cold Spray: Recent Developments

The Oxidation Behavior of TBC with Cold Spray CoNiCrAlY Bond Coat

Numerical Simulation of Temperature Uniformity within Solid Particles in Cold Spray

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