Study of oxidation behavior of nanostructured NiCrAlY bond coatings deposited by cold spraying

Zhang, Qiang; Li, Chang-Jiu; Lui, Siu-Ching

doi:10.1016/j.surfcoat.2007.12.028

Cited by 113 publications

(52 citation statements)

References 19 publications

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“…A certain level of surface roughness is desired in the production of coating. A number of studies are available in the literature regarding the effect of surface roughness on TBC formation [10,[28][29][30][31][32][33][34]. According to literature, surface treatments like shot peening, grit blasting and polishing are used to decrease surface roughness for TBC systems.…”

Section: As-deposited Coating Characterizationmentioning

confidence: 99%

“…Recently, Vacuum Plasma Spray (VPS), High Velocity Oxygen Fuel (HVOF) and Cold Gas Dynamic Spray (CGDS) have been the preferred methods to obtain a bond coat content with high density and low porosity and to get a better resistance against oxidation and corrosion for TBC [10]. Although these are considered to be better alternatives for APS coatings, APS method is still a simpler method with a higher cost-efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Effect of shot peening on the oxidation behavior of thermal barrier coatings

Karaoğlanlı

Döleker

Demirel

et al. 2015

Applied Surface Science

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Section: As-deposited Coating Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of shot peening on the oxidation behavior of thermal barrier coatings

Karaoğlanlı

Döleker

Demirel

et al. 2015

Applied Surface Science

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“…Cold spraying is also being investigated to deposit MCrAlY coating (Ref [24][25][26][27]. A cold-sprayed coating is formed through the plastic deformation upon the impact of sprayed particles at a temperature well below the melting point of the spray material, which makes the cold spraying become an alternative method to deposit a dense MCrAlY bond coat in thermal barrier coatings without oxidation (Ref [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…A cold-sprayed coating is formed through the plastic deformation upon the impact of sprayed particles at a temperature well below the melting point of the spray material, which makes the cold spraying become an alternative method to deposit a dense MCrAlY bond coat in thermal barrier coatings without oxidation (Ref [24][25][26][27][28]. The simulation results reported by Li et al (Ref 29) and Grujicic et al (Ref 30) indicate that the intensive deformation occurs mainly at the bottom of a particle, while the upper surface of an impacting particle may experience less deformation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Chemical Compositions and Surface Morphologies of MCrAlY Coating on Its Isothermal Oxidation Behavior

Zhang

et al. 2010

J Therm Spray Tech

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Chemical composition and surface morphology of MCrAlY coatings are factors which influence the oxidation behavior and the thermal durability of thermal barrier coatings. In this study, Cold-sprayed Ni20Cr10AlY and Ni23Co20Cr8.5Al4.0Ta0.6Y coatings with polished surfaces were employed to study the effect of composition on the oxidation behavior. The cold-sprayed MCrAlY coatings at the as-sprayed and shot-peened surface conditions, along with the low pressure plasma-sprayed MCrAlY coating with sputters adhered weakly on the surface, were employed to investigate the effects of surface morphologies of MCrAlY coatings on their oxidation behavior. Cold-sprayed Ni20Cr10AlY coating exhibited a two-stage oxidation behavior and a higher TGO growth rate than that of the cold-sprayed Ni23Co20Cr8.5Al4.0Ta0.6Y coating at the rapid growth stage. After 10-h oxidation, the TGO on the as-cold-sprayed coating surface was mainly constituted by Al 2 O 3 , while the TGO on the coating surface attached with sputters was composed of Al 2 O 3 and Cr/Ni-oxides. After 500-h oxidation, Cr 2 O 3 and porous spinel appeared in the TGO on the surface of the as-cold-sprayed coatings with different compositions. The growth of Cr/Ni-oxides was attributed to the Al depletion. The content of spinel decreased on the cold-sprayed NiCrAlY with a shot-peened surface compared with the as-sprayed coating.

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“…This induces intimate bonding assisted by adiabatic shear instability at the particle-particle and particle-substrate interface . Such characteristic of kinetic spray process, using kinetic energy rather than thermal energy for the particle deposition, provides specific properties to the resultant coating layer (Ref 3,(14)(15)(16)(17)(18)(19)(20)(21)(22)(23). Accordingly, kinetic spray process has been applied to various industrial fields such as automotive, aviation, defense, energy, etc.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of Kinetic Spray Coatings: A Review

2015

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Kinetic spray process has been applied to various industrial fields such as automotive, aviation, and defense industries due to its availability to produce high-performing coating layer. However, since the properties of kinetic-sprayed coating layer are significantly affected by the microstructures of deposit, the microstructures of the deposit should be controlled to acquire advanced coating layer and, accordingly, deep understanding of microstructural evolution must be achieved before controlling the microstructure of the coating layer. This paper gives an overview of contents related to the microstructure of kineticsprayed deposition. The most powerful influencing factors in microstructural evolution of kinetic-sprayed coating layer are instant generation of thermal energy and high-strain, high-strain-rate plastic deformation at the moment of particle impact. A high-density coating layer with low porosity can be produced, although some micro-cracks are occasionally induced at the interparticle boundary or at the inner region of the particles. Also, a microstructure which is distinct from the inner particle region is created in the vicinity of the particle-particle or particle-substrate interface region. However, almost no crystal phase transformation or chemical reaction is induced since the deposited particles are not heated directly by a thermal energy source.

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Study of oxidation behavior of nanostructured NiCrAlY bond coatings deposited by cold spraying

Cited by 113 publications

References 19 publications

Effect of shot peening on the oxidation behavior of thermal barrier coatings

Effect of shot peening on the oxidation behavior of thermal barrier coatings

Effect of Chemical Compositions and Surface Morphologies of MCrAlY Coating on Its Isothermal Oxidation Behavior

Microstructure of Kinetic Spray Coatings: A Review

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