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

    研究成果: Article査読

    43 被引用数 (Scopus)

    抄録

    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.

    本文言語English
    ジャーナルUltrasonics Sonochemistry
    DOI
    出版ステータスAccepted/In press - 2014 11 5

    ASJC Scopus subject areas

    • 化学工学(その他)
    • 音響学および超音波学
    • 放射線学、核医学およびイメージング

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