Microstructure and cavitation–silt erosion behavior of high-velocity oxygen–fuel (HVOF) sprayed Cr3C2–NiCr coating

Hong, Sheng; Wu, Yifei; Wang, Qian; Ying, Guobing; Li, Gaiye; Gao, Wenwen; Wang, Bo; Guo, Wenmin

doi:10.1016/j.surfcoat.2013.03.020

Cited by 92 publications

(33 citation statements)

References 37 publications

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“…The average porosity of the coating is determined to be 0.85% by the image analysis at a magnification of 500×. A similar morphology has been observed in previous investigations [12,[20][21][22][23]. From Fig.…”

Section: Methodssupporting

confidence: 84%

Microstructure and electrochemical properties of nanostructured WC–10Co–4Cr coating prepared by HVOF spraying

Hong

Zheng

et al. 2013

Surface and Coatings Technology

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Section: Methodssupporting

confidence: 84%

Microstructure and electrochemical properties of nanostructured WC–10Co–4Cr coating prepared by HVOF spraying

Hong

Zheng

et al. 2013

Surface and Coatings Technology

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“…1(b) that some pores are visible as very dark regions in the coating. The average porosity value of the coating is less than 1% by the image analysis, which is in accord with the results observed in previous investigations of other HVOF sprayed coatings [21,22,[28][29][30]. TEM and HRTEM were undertaken to investigate more detailed microstructural information at a finer scale of the coating.…”

Section: Cavitation Erosion Testsupporting

confidence: 89%

“…4 presents the surface morphologies of the coating after cavitation erosion for 10 h in 3.5 wt.% NaCl solution. Two typical eroded regions including the cavitation erosion region and the boundary of the cavitation erosion region were examined under SEM, which had been introduced in our previous work [28]. It reveals that pits and cracks are observed on the eroded surface at the boundary of the cavitation erosion region (Fig.…”

Section: Cavitation Erosion Behavior and Mechanism In 35 Wt% Nacl Smentioning

confidence: 99%

Ultrasonic cavitation erosion of high-velocity oxygen-fuel (HVOF) sprayed near-nanostructured WC–10Co–4Cr coating in NaCl solution

Hong

Zhang

et al. 2015

Ultrasonics Sonochemistry

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The high-velocity oxygen-fuel (HVOF) spraying process was used to prepare near-nanostructured WC-10Co-4Cr coating. The cavitation erosion behavior and mechanism of the coating in 3.5 wt.% NaCl solution were analyzed in detail. The results showed that the amorphous phase and WC grain were present in the coating. The cavitation erosion resistance of the coating was about 1.27 times that of the stainless steel 1Cr18Ni9Ti under the same testing conditions. The effects of erosion time on the microstructural evolution were discussed. It was revealed that cracks initiated at the edge of pre-existing pores and propagated along the carbide-binder interface, leading to the pull-out of carbide particle and the formation of pits and craters on the surface. The main failure mechanism of the coating was erosion of the binder phases, brittle detachment of hard phases and formation of pitting corrosion products.

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“…Coatings deposited by the HVOF process exhibit high density, low porosity, excellent adhesive strength with much more carbide particles retained in the matrix compared with those deposited by plasma spraying process. It has been reported that HVOF-sprayed Cr 3 C 2 -NiCr coatings exhibit good wear resistance and corrosion resistance in various high-temperature environments [6][7][8][9].…”

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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Microstructure and cavitation–silt erosion behavior of high-velocity oxygen–fuel (HVOF) sprayed Cr3C2–NiCr coating

Cited by 92 publications

References 37 publications

Microstructure and electrochemical properties of nanostructured WC–10Co–4Cr coating prepared by HVOF spraying

Microstructure and electrochemical properties of nanostructured WC–10Co–4Cr coating prepared by HVOF spraying

Ultrasonic cavitation erosion of high-velocity oxygen-fuel (HVOF) sprayed near-nanostructured WC–10Co–4Cr coating in NaCl solution

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

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