期刊
ULTRASONICS SONOCHEMISTRY
卷 52, 期 -, 页码 142-149出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2018.11.010
关键词
Cavitation erosion; Fe-based coating; Amorphous/nanocrystalline; Eroded particles; Model
资金
- National Natural Science Foundation of China [51579087, 51609067]
- Fundamental Research Funds for the Central Universities [2018B48914]
- Natural Science Foundation of Jiangsu Province of China [BK20150806]
- China Postdoctoral Science Foundation [2018T110435, 2016M590404]
- Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province [2016CL08]
- CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences [2016NMSAKF03]
A Fe-based amorphous/nanocrystalline coating was prepared on the AISI 321 steel by the high-velocity oxygen fuel (HVOF) thermal spraying technology in this paper. Cavitation erosion behavior and mechanism of the coating was studied through the analysis of curves for cavitation erosion resistance versus time and the observation of eroded particles, with the AISI 321 steel as a reference. It was found that the Fe-based coating had better cavitation erosion resistance than the AISI 321 steel, and exhibited obvious periodic failure behavior in the cavitation erosion process. Besides, the crystallization of the amorphous phase under the effect of shock wave was observed. The cavitation erosion mathematic model of the coating was also established. The model indicated that the cavitation erosion resistance of the coating was related to the grain size and the fracture energy per unit area of the coating. Small grain size and high fracture energy per unit area were benefit to improve the cavitation erosion resistance of the Fe-based coating.
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