Dominant effect of carbide rebounding on the carbon loss during high velocity oxy-fuel spraying of Cr3C2–NiCr

Li, Chang-Jiu; Ji, Gao; Wang, Yuyue; Sonoya, Keiji

doi:10.1016/s0040-6090(02)00708-3

Cited by 86 publications

(31 citation statements)

References 7 publications

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“…Chromium carbide-based materials are generally employed to produce hard coatings for high temperature wear applications including sliding, fretting, abrasion, and erosion in powder generation industry, aerospace industry, oil-refining industry, heat-treatment rolls, and coal burning boiler tubes [1,2]. The chromium carbides-nickel chromium (Cr 3 C 2 -NiCr) cermet coatings have been widely practiced in industry, caused by the advantageous combination of Cr 3 C 2 ceramic phase with good wear-resistance and NiCr metal phase which provides high oxidation resistance to high temperature [3,4]. The process of high velocity oxygen fuel (HVOF) spray turns out to be the most promising process, which means it is preferable to deposit cermet coatings such as Cr 3 C 2 -NiCr and WC-Co.…”

Section: Introductionmentioning

confidence: 99%

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

et al. 2017

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Abstract:In this work, the Cr 3 C 2 -25% NiCr powder was deposited on stainless steel with different combustion pressures and powder feed rates using HVOF technique. The microstructure, porosity, micro-hardness, indentation fracture toughness, adhesion strength, and wear resistance at 500 • C of the coatings were investigated. The results showed that HVOF sprayed Cr 3 C 2 -25% NiCr coatings possessed low porosity, high micro-hardness, and enough adhesion strength. The powder feed rate had obvious effect on porosity, micro-hardness and indention fracture toughness of the coatings, and the coating sprayed under the powder feed rate of 33.5 g/min possessed the optimal performance. The wear tests illustrated that the HVOF sprayed Cr 3 C 2 -25NiCr coating possessed good wear resistance at the temperature of 500 • C, in which the coating sprayed at the powder feed rate of 33.5 g/min had the best wear resistance due to its dense structure and enough fracture toughness.

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Section: Introductionmentioning

confidence: 99%

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

et al. 2017

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“…In order to provide wear resistance in high-temperature environments, chromium carbides-nickel chromium (Cr 3 C 2 -NiCr) cermet coatings have been widely practiced in industry, due to the advantageous combination of Cr 3 C 2 ceramic phase with good wear-resistance and NiCr metal phase providing high oxidation resistance up to more than 800°C [7,[12][13][14]. For example, Cr 3 C 2 -NiCr cermet coatings have been widely used for high-temperature wear resistance and corrosion resistance in powder generation industry, aerospace industry, oil-refining industry, heattreatment rolls, and coal burning boiler tubes [14,15].…”

Section: Introductionmentioning

confidence: 99%

Sliding Wear Behavior of HVOF-sprayed Cr3C2–NiCr/CeO2 Composite Coatings at Elevated Temperature up to 800 °C

et al. 2009

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Four types of Cr 3 C 2 -NiCr coatings containing different fractions of CeO 2 additive were deposited using high velocity oxy-fuel spraying. Hardness tester, X-ray diffractometer, contact surface profiler, and scanning electron microscope equipped with energy dispersive spectrometer were employed to characterize the microhardness, phase composition, surface roughness, and microstructure of as-sprayed coatings. At the same time, the friction and wear behavior of the as-sprayed coatings sliding against Si 3 N 4 ball at room temperature and elevated temperature of 400 or 800°C under unlubricated condition was evaluated using an oscillating friction and wear tester. The worn surfaces of the composite coatings and Si 3 N 4 counterpart balls were analyzed by means of scanning electron microscopy, X-ray diffraction, and three dimensional non-contact surface profiler. The friction and wear mechanisms of the coatings with and without CeO 2 additive were comparatively discussed. Results show that the composite coatings doped with CeO 2 had better wear-resistance than that without CeO 2 , and the coating containing 4 wt% CeO 2 showed the best wear-resistant property. The improved wear-resistant properties of the composite coatings doped with CeO 2 were attributed to the refined microstructure and improved mechanical properties induced by CeO 2 .

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“…5,9,[12][13][14] Moreover, it could be considered that the decomposition of the carbide is limited during spraying.…”

Section: Discussionmentioning

confidence: 99%

Deposition Behaviors of Solid Phases in Liquid-Solid Two-Phase Particles in High Velocity Oxy-Fuel Spraying

Wang

Kusumoto

2006

Mater. Trans.

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Three types of composite coatings were deposited by high velocity oxy-fuel (HVOF) spraying using metal-clad WC-18Co and SiC-50Co cermet powders, and sintered-crushed Al 2 O 3 -75Ni composite powders. Liquid-solid two-phase state of the sprayed particles with two different structures was achieved prior to their impingement on the substrate. The effects of particle structure and HVOF spraying parameters on volume fraction of the solid phase were investigated. The distribution of ceramic particle size inside coatings was also clarified. Scanning electron microscopy was employed to characterize the microstructure of HVOF sprayed cermet coatings. The volume fraction of solid particles and the distribution of particle size in the three types of coatings were estimated using a quantitatively metallographic approach from the microstructure of the coatings. The volume fraction of the solid phase in the coating made from Al 2 O 3 -Ni powders was increased with increase in the fuel gas flow. The maximum volume fraction of the Al 2 O 3 phases reached about 64% of the original powder. On the other hand, the volume fraction of solid phase in the clad cermet coatings was decreased with increasing the fuel gas flow. The volume fraction of the solid phase dropped significantly from 72.2% in the original WC-18Co particle to 8.5% in the coating. The limited retention of the solid phase from spray particle to subsequent coating is due to rebounding off of large solid particle upon impacting.

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Dominant effect of carbide rebounding on the carbon loss during high velocity oxy-fuel spraying of Cr3C2–NiCr

Cited by 86 publications

References 7 publications

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

Sliding Wear Behavior of HVOF-sprayed Cr3C2–NiCr/CeO2 Composite Coatings at Elevated Temperature up to 800 °C

Deposition Behaviors of Solid Phases in Liquid-Solid Two-Phase Particles in High Velocity Oxy-Fuel Spraying

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