The High-Temperature Wear and Oxidation Behavior of CrC-Based HVOF Coatings

Houdková, Šárka; Česánek, Zdeněk; Smazalová, Eva; Lukáč, František

doi:10.1007/s11666-017-0637-3

Cited by 23 publications

(11 citation statements)

References 33 publications

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“…As it can be seen, the standard deviation value was quite small, which indicates low porosity and a homogenous structure (which is observed in Figure 6). Similar values for Cr 3 C 2 -NiCr coatings could be found in [37,[45][46][47].…”

Section: The Instrumented Indentationsupporting

confidence: 84%

Microstructure and Selected Properties of Cr3C2–NiCr Coatings Obtained by HVOF on Magnesium Alloy Substrates

2020

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In present work the Cr3C2–NiCr coating was deposited on magnesium alloy substrate with high velocity oxygen fuel (HVOF) spraying. The microstructure of the samples has been characterized by means of electron microscopy, SEM and phase composition analysis carried out. The porosity of coatings has been also estimated. Finally, tests of selected mechanical properties, such as instrumented indentation, abrasive erosion have been performed. The results of the investigations confirmed that dense, homogeneous and well-adhered Cr3C2–NiCr cermet coating is possible to obtain onto the magnesium AZ31 alloy substrate. Moreover, the coatings exhibit high resistance to erosion.

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Section: The Instrumented Indentationsupporting

confidence: 84%

Microstructure and Selected Properties of Cr3C2–NiCr Coatings Obtained by HVOF on Magnesium Alloy Substrates

2020

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“…Such deposits have been found to improve the longevity of the base material/alloy to a certain level [ 25 , 26 , 27 , 28 ]. Numerous TSC methods, such as APS and HVOF, are extensively utilized to deposit high Ni and Cr powder coatings onto various PP component surfaces in order to withstand HC [ 4 , 29 ]. The present work utilizes Cr 3 C 2 -25NiCr powder, which was chosen as the high chromium (Cr) content of the material is advantageous for providing HC resistance by protecting the oxidic layers of Cr 2 O 3 on the Ni superalloy’s surface.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Corrosion of APS- and HVOF-Coated Nickel-Based Super Alloy under Air Oxidation and Melted Salt Domains

et al. 2021

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Various thermal spraying approaches, such as air/atmospheric plasma spraying (APS) and high-velocity oxy-fuel (HVOF) spraying, are widely employed by plants owing to their flexibility, low costs and the high surface quality of the manufactured product. This study focuses on the corrosion behavior of a Ni superalloy coated with powder Cr3C2-25NiCr through APS and HVOF at 950 °C under air oxidation and Na2SO4 + 0.6V2O5 molten salt environments (MSE). The results show that HVOF-deposited Ni superalloys have higher hardness and bond strength than the respective APS coating. The thermo-gravimetric probe reveals that the Ni superalloys exposed to an oxidizing air environment has a minor mass gain compared to those under the MSE domain for both non-coated and coated samples, in line with the parabola curvature rate oxidizing law. The Ni superalloys show good corrosion resistance but poor oxidation resistance in APS-deposited Ni superalloys under the MSE. HVOF-coated Ni superalloys in both environments exhibit better corrosion resistance and lower mass gain than APS-coated superalloys. The excellent coating characteristics of HVOF-coated Ni superalloys lead to their better high-temperature corrosion performance than APS.

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“…Of the required properties, the problem of wear resistance is most often addressed. If combined with high temperatures, the CrC-based hardmetal coatings, deposited by high-velocity oxygen fuel (HVOF) spraying technology, proves its superiority under harsh loading conditions [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…In these works, the mechanism of erosion wear was proposed, taking into account the influence of high temperature and oxidation [13]. It was found that in the aggressive environment, the preferential oxidation of CrC carbides takes place [2,14], leading to a degradation of the coating's microstructure and increased erosion wear [14]. To increase the resistance against corrosion and oxidation in aggressive environments, the application of CrC-based coatings with alternative matrix compositions was suggested [2,17].…”

Section: Introductionmentioning

confidence: 99%

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Impact Wear of the Protective Cr3C2-Based HVOF-Sprayed Coatings

et al. 2020

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High velocity oxygen-fuel (HVOF) prepared CrC-based hardmetal coatings are generally known for their superior wear, corrosion, and oxidation resistance. These properties make this coating attractive for application in industry. However, under some loading conditions and in aggressive environments, the most commonly used NiCr matrix is not sufficient. The study is focused on the evaluation of dynamic impact wear of the HVOF-sprayed Cr3C2-25%NiCr and Cr3C2-50%NiCrMoNb coatings. Both coatings were tested by an impact tester with a wide range of impact loads. The Wohler-like dependence was determined for both coatings’ materials. It was shown that, due to the different microstructure and higher amount of tough matrix, the impact lifetime of the Cr3C2-50%NiCrMoNb coating was higher than the lifetime of the Cr3C2-25%NiCr coating. Differences in the behavior of the coatings were the most pronounced at high impact loads.

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The High-Temperature Wear and Oxidation Behavior of CrC-Based HVOF Coatings

Cited by 23 publications

References 33 publications

Microstructure and Selected Properties of Cr3C2–NiCr Coatings Obtained by HVOF on Magnesium Alloy Substrates

Microstructure and Selected Properties of Cr3C2–NiCr Coatings Obtained by HVOF on Magnesium Alloy Substrates

High-Temperature Corrosion of APS- and HVOF-Coated Nickel-Based Super Alloy under Air Oxidation and Melted Salt Domains

Impact Wear of the Protective Cr3C2-Based HVOF-Sprayed Coatings

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