Effect of rare earth elements on coatings developed by thermal spraying processes (TSP) – A brief review

Vishnoi, Mohit; Murtaza, Qasim; Kumar, Pawan

doi:10.1016/j.matpr.2020.10.439

Cited by 13 publications

(7 citation statements)

References 27 publications

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“…The melting point of rare earth such as (La 2 O 3 , CeO 2 , and Er 2 O 3 ) is in the range of 2300°C–2500°C, 2 so these particles are not melted during solidification in the flame spraying process and work as heterogeneous nucleation sites for crystal nucleation which prevents the grain growth. 15 But in the case of the HP-HVOF process, the flame has a temperature of approximately 2630°C; at this huge temperature, even rare earth metal has also been melted and created a homogeneous mixture of coating.…”

Section: Resultsmentioning

confidence: 99%

“…It improved tribological properties like erosion, corrosion, wear resistance, and the coating’s grip (adhesion) on the substratum. 2…”

Section: Introductionmentioning

confidence: 99%

“…It improved tribological properties like erosion, corrosion, wear resistance, and the coating's grip (adhesion) on the substratum. 2 Coating powder is mixed with these rare earth elements or their oxides during various coating processes which leads to the fabrication of coatings that are much better in quality as compared to those coated with standard coating powder and also much more economical.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of erbium oxide doped HP-HVOF deposited carbide ceramic coating on martensitic steel

Vishnoi

Murtaza

Kumar

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Rare earth elements (REEs) are known as the “vitamin or nutrients” of metals. The addition of rare earth in a limited quantity can enhance the properties of materials. This article elucidates the effect of doping of rare earth oxide (0.9 wt.% Er2O3) on the mechanical and surface behavior of tungsten carbide (WC-10Co-4Cr) based coatings developed using high pressure high velocity oxygen fuel (HP-HVOF) thermal sprayed techniques on martensitic stainless steel (SS410). With the addition of rare earth oxides, the result shows that the hardness of the deposited coating (HV1261.17) is far higher than the substrate (HV193.47). The modulus of elasticity and flexural strength is enhanced for the coated sample as compared to the substrate. The porosity level of the coating is found to be less than 1% and the static water contact angle for coated surface (≈125.1°) shows the coated sample is hydrophobic in nature. The surface characterization was done using the scanning electron microscope attached with energy dispersive X-ray analysis which has identified the presence of various elements on the surface including rare earth. The surface of coated samples has various phases of rare earth oxides such as monoclinic and cubic rare earth oxides. Moreover, its compounds such as Co3W3C were confirmed by X-ray diffraction measurements. After comparing previous literature with current results can conclude that the addition of rare earth oxides (0.9 wt.% Er2O3) on carbide coatings enhanced the various properties of materials.

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Section: Resultsmentioning

confidence: 99%

“…It improved tribological properties like erosion, corrosion, wear resistance, and the coating’s grip (adhesion) on the substratum. 2…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of erbium oxide doped HP-HVOF deposited carbide ceramic coating on martensitic steel

Vishnoi

Murtaza

Kumar

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…[ 162–165 ] However, further enhancement in the range of properties depends on elements used in coating powder. [ 166 ]…”

Section: Special Considerations For Enhanced Em Wave Propagation Char...mentioning

confidence: 99%

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

et al. 2022

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This review aims to consolidate scattered literature on thermally sprayed coatings with nonionizing electromagnetic (EM) wave absorption and shielding over specific wavelengths potentially useful in diverse applications (e.g., microwave to millimeter wave, solar selective, photocatalytic, interference shielding, thermal barrier‐heat/emissivity). Materials EM properties such as electric permittivity, magnetic permeability, electrical conductivity, and dielectric loss are critical due to which a material can respond to absorbed, reflected, transmitted, or may excite surface electromagnetic waves at frequencies typical of electromagnetic radiations. Thermal spraying is a standard industrial practice used for depositing coatings where the sprayed layer is formed by successive impact of fully or partially molten droplets/particles of a material exposed to high or moderate temperatures and velocities. However, as an emerging novel application of an existing thermal spray techniques, some special considerations are warranted for targeted development involving relevant characterization. Key potential research areas of development relating to material selection and coating fabrication strategies and their impact on existing practices in the field are identified. The study shows a research gap in the feedstock materials design and doping, and their complex selection covered by thermally sprayed coatings that can be critical to advancing applications exploiting their electromagnetic properties.

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“…(4) Improves the oxide morphology and increases the resilience to thermal shock in thermal shock cycles. It has lowered the rate of chromium (Cr) consumption, promoted the creation of spherical agglomerates, and hindered the formation of spinel-like structures on the surface [27,28].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and surface characterization of Er₂O₃/La₂O₃/CeO₂ doped carbide coating developed using high velocity oxy fuel (HVOF)

Vishnoi,

Murtaza,

Kumar

2023

Phys. Scr.

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This study is mainly focused on effect of rare earth oxides on a composite coating applied to martensitic steel (SS410) using the high velocity oxy fuel (HVOF) process. The composite coating consists of WC-10Co-4Cr doped with rare earth (erbium oxide/lanthanum oxide/cerium oxide; 0.2 wt%. each). The range of deposited coating thickness was 282–300 μm. Mechanical testing, including tensile, flexural, and hardness tests, along with surface characterization, such as examining morphology, porosity, elemental composition, and phase identification with wettability testing has been conducted on both the substrate and coated samples. The hardness of the coatings is increased by approximately four times to the substrate. The coated sample has porosity in the range of ≥1 to ≤ 2%. The contact angle of the coated surface has enhanced (≈134°) than the substrate (≈61°), this indicates that the coated surface exhibits hydrophobicity.

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Effect of rare earth elements on coatings developed by thermal spraying processes (TSP) – A brief review

Cited by 13 publications

References 27 publications

Characterization of erbium oxide doped HP-HVOF deposited carbide ceramic coating on martensitic steel

Characterization of erbium oxide doped HP-HVOF deposited carbide ceramic coating on martensitic steel

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Mechanical and surface characterization of Er₂O₃/La₂O₃/CeO₂ doped carbide coating developed using high velocity oxy fuel (HVOF)

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Effect of rare earth elements on coatings developed by thermal spraying processes (TSP) – A brief review

Cited by 13 publications

References 27 publications

Characterization of erbium oxide doped HP-HVOF deposited carbide ceramic coating on martensitic steel

Characterization of erbium oxide doped HP-HVOF deposited carbide ceramic coating on martensitic steel

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Mechanical and surface characterization of Er2O3/La2O3/CeO2 doped carbide coating developed using high velocity oxy fuel (HVOF)

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Mechanical and surface characterization of Er₂O₃/La₂O₃/CeO₂ doped carbide coating developed using high velocity oxy fuel (HVOF)