Microstructural characterisation of air plasma sprayed nanostructure ceramic coatings on Mg–1%Ca alloys (bonded by NiCoCrAlYTa alloy)

Daroonparvar, Mohammadreza; Yajid, Muhamad Azizi Mat; Yusof, Noordin Mohd; Bakhsheshi‐Rad, Hamid Reza; Hamzah, Esah

doi:10.1016/j.ceramint.2015.08.118

Cited by 31 publications

(4 citation statements)

References 50 publications

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“…Recently, progress has been demonstrated in the prospective application domains of nonskid Fe-based amorphous coatings with a texture feature for aircraft carrier decks [4] as more promising materials for more supply chains. Among thermal spraying techniques, plasma spraying with an extremely high solidification rate of over 10 6 K•s −1 can inherit the amorphous nature of feedstock and it is highly efficient and cost-effective to produce Fe-based amorphous coatings with processing simplicity and flexibility [6][7][8]. blasted with corundum (46 # ) to achieve a certain roughness.…”

Section: Introductionmentioning

confidence: 99%

Time-Dependent Passivation Performance of Plasma Sprayed FeCrMoCBY Amorphous Coating

Wang

Zhou

et al. 2023

Coatings

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The relationship between passive film growth behavior and passivation time for plasma-sprayed Fe48Cr15Mo14C15B6Y2 amorphous coating in borate buffer solution has been thoroughly studied. The morphological characteristic and structural feature of as-spayed amorphous coating were estimated by scanning electron spectroscopy (SEM), X-ray diffraction (XRD) and transmission electron spectroscopy (TEM). The influence of passivation time on the film evolution properties was measured by electrochemical impedance spectra (EIS), Mott–Schottky curves, atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS). The results revealed that both corrosion resistance and self-repairing capacity of passive film greatly increased with time based on high electric field assumption. Reductions in donor density and flat band potential were accountable for a lower conductivity of passive film. An increment in Cr2O3 oxide as the inner barrier layer derived from the dehydration reaction of Cr(OH)3 contributed to the gradually densified structure of passive film. The extracted passive film thickness d increment with passivation time t conformed to the logarithm law on the basis of effective capacitance hypothesis: d=0.43lnt+52.06−2.18 (nm). Passivation mechanism within 600 s was ascribed to the adsorption of mechanical mixtures between metal ions and electrolytes, possibly leading to mechanical stress and rupture of passive film in the later growth procedure. The cation vacancy condensation process at the interface of coating/film was propitious in stabilizing the growth rate of passive film.

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Section: Introductionmentioning

confidence: 99%

Time-Dependent Passivation Performance of Plasma Sprayed FeCrMoCBY Amorphous Coating

Wang

Zhou

et al. 2023

Coatings

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“…Upon impact, these powder particles then plastically deform due to the combination of adiabatic heating and high shear rates, the particles are then flattened in a jet-like formation and bonded to the substrate [20]. When compared to thermal-based coating techniques, the adhesion of CS coatings is superior in the sense that the oxide film on the surface of the substrate is eliminated from the high-speed impact of the particles [21][22][23][24][25]. In general, it is known that through higher particle velocities, the metallurgical bonding between the particle-to-substrate and particle-to-particle interfaces is enhanced, which can promote the formation of a dense coating (through layer-by-layer addition) with considerable adhesive and cohesive strengths [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Generally speaking, the bond strength of CS coatings has been reported to be exceptionally high across a variety of material substrates compared to other thermal-spray technologies. This is largely due to the compressive stresses that are generated from the mechanical interlocking and peening-like effects of the impacted particles, whereas tensile stresses occur from the particle heating of more thermal-based technologies [21,24,29]. Common material systems that have been reported to have sufficient bonding strength for CS coatings include but are not limited to metals (such as aluminum, titanium or nickel), their alloys (such as high-entropy alloys or Inconel), and various composites (such as metal matrix composites) [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Effect of Gas Propellant Temperature on the Microstructure, Friction, and Wear Resistance of High-Pressure Cold Sprayed Zr702 Coatings on Al6061 Alloy

et al. 2022

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For the first time, Zr702 coatings were deposited onto an Al6061 alloy using a high-pressure cold spray (HPCS) system. In this work, five different N2 process gas temperatures between 700 and 1100 °C were employed to understand the formation of cold sprayed (CS) Zr coatings and their feasibility for enhanced wear resistance. Results indicated that the N2 processing gas temperature of about 1100 °C enabled a higher degree of particle thermal softening, which created a dense, robust, oxide- and defect-free Zr coating. Across all CS Zr coatings, there was a refinement of crystallinity, which was attributed to the severe localized plastic deformation of the powder particles. The enhanced thermal boost up zone at the inter-particle boundaries and decreased recoverable elastic strain were accountable for the inter-particle bonding of the coatings at higher process gas temperatures. The flattening ratio (ε) increased as a function of temperature, implying that there was a greater degree of plastic deformation at higher N2 gas temperatures. The microhardness readings and wear volume of the coatings were also improved as a function of process gas temperature. In this work, the wear of the Al6061 alloy substrate was mainly plowing-based, whereas the Zr CS substrates demonstrated a gradual change of abrasive to adhesive wear. From our findings, the preparation of CS Zr coatings was a feasible method of enhancing the wear resistance of Al-based alloys.

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“…Compared to the high velocity oxy-fuel (HVOF) thermal spray process which uses a combination of thermal and kinetic energies, cold spray utilizes only kinetic (dynamic) energy to deposit the powder particles [12][13][14][15]. Likewise, the microstructural degeneration of heat-susceptible substrates such as Mg alloys which is frequently seen in the substitute thermal spray methods could be prevented by means of cold spray process [4,[16][17][18]. In contrast to thermal spray technologies such as electric arc wire spray, plasma spray, flame spray and HVOF spray processes which partially and/or fully melt particles during the spray process; CS can avert the thermal effects including oxidation, porosity, grain growth and phase transformation during spray process [12,13,19,20].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Wear, Pitting Corrosion Resistance and Repassivation Ability of Mg-Based Alloys Using High Pressure Cold Sprayed (HPCS) Commercially Pure-Titanium Coatings

et al. 2021

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In this study, a compact cold sprayed (CS) Ti coating was deposited on Mg alloy using a high pressure cold spray (HPCS) system. The wear and corrosion behavior of the CS Ti coating was compared with that of CS Al coating and bare Mg alloy. The Ti coating yielded lower wear rate compared to Al coating and Mg alloy. Electrochemical impedance spectroscopy (EIS) and cyclic potentiodynamic polarization (CPP) tests revealed that CS Ti coating can substantially reduce corrosion rate of AZ31B in chloride containing solutions compared to CS Al coating. Interestingly, Ti-coated Mg alloy demonstrated negative hysteresis loop, depicting repassivation of pits, in contrast to AZ31B and Al-coated AZ31B with positive hysteresis loops where corrosion potential (Ecorr) > repassivation potential (Erp); indicating irreversible growth of pits. AZ31B and Al-coated AZ31B were most susceptible to pitting corrosion, while Ti-coated Mg alloy indicated noticeable resistance to pitting in 3.5 wt % NaCl solution. In comparison to Al coating, Ti coating considerably separated the AZ31BMg alloy surface from the corrosive electrolyte during long term immersion test for 11 days.

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Microstructural characterisation of air plasma sprayed nanostructure ceramic coatings on Mg–1%Ca alloys (bonded by NiCoCrAlYTa alloy)

Cited by 31 publications

References 50 publications

Time-Dependent Passivation Performance of Plasma Sprayed FeCrMoCBY Amorphous Coating

Time-Dependent Passivation Performance of Plasma Sprayed FeCrMoCBY Amorphous Coating

Effect of Gas Propellant Temperature on the Microstructure, Friction, and Wear Resistance of High-Pressure Cold Sprayed Zr702 Coatings on Al6061 Alloy

Improvement of Wear, Pitting Corrosion Resistance and Repassivation Ability of Mg-Based Alloys Using High Pressure Cold Sprayed (HPCS) Commercially Pure-Titanium Coatings

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