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

Sheng Hong, Yuping Wu, Jianfeng Zhang, Yugui Zheng, Yujiao Qin, Jinran Lin

    Research output: Contribution to journalArticlepeer-review

    43 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    JournalUltrasonics Sonochemistry
    DOIs
    Publication statusAccepted/In press - 2014 Nov 5

    Keywords

    • Cavitation
    • Coating
    • HVOF
    • Near-nanostructured
    • WC-10Co-4Cr

    ASJC Scopus subject areas

    • Chemical Engineering (miscellaneous)
    • Acoustics and Ultrasonics
    • Radiology Nuclear Medicine and imaging

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