Composition Design and Erosion Wear Analysis of Al-B2O3-CeO2-Fly Ash Composite Reinforced Coating

Abstract

Abstract: In order to improve the application and performance of fly ash reinforced materials in metal matrix composites, thermodynamic analysis, and orthogonal optimization experiments are used to determine the possible reactions between the components of the Al-B₂O₃-CeO₂-fly ash composite reinforced coating and the best ratio formula. At the same time, the fly ash composite reinforced coating was prepared on ZG310-570 matrix by plasma spraying. The surface morphology, phase, and erosion wear properties of the fly ash composite reinforced coating were also analyzed. Thermodynamic analysis and orthogonal optimization experiments show that solid-phase reactions occur between Al, B₂O₃, CeO₂ and fly ash. The best proportion of fly ash composite reinforced coating formula was fly ash 55%, B₂O₃20%, Al20%, CeO₂5% (mass fraction). The fly ash composite reinforced coating has an uneven lamellar structure with good compactness, but there are longitudinal cracks, insufficiently melted particles, and pores. The results of X-ray analysis and thermodynamic analysis show that the fly ash composite reinforced coating has new phases such as Al₂O₃, CeB₆, 2MgO·SiO₂, 3CaO·B₂O₃, etc. In a certain erosion time, erosion angle and different erosion speeds, the relative erosion resistance of the fly ash composite reinforced coating was at least 20.41 times, 22.43 times and 23.17 times higher than that of the ZG310-570 matrix, respectively.

Key words: Al-B₂O₃-CeO₂-fly ash composite reinforced coating, erosion wear, thermal shock, plasma spraying, ZG310-570 cast steel

CLC Number:

TB333

SUN Fanghong, MA Zhuang, SUN Guodong, GAO Zhiyu. Composition Design and Erosion Wear Analysis of Al-B₂O₃-CeO₂-Fly Ash Composite Reinforced Coating[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2270-2279.

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Composition Design and Erosion Wear Analysis of Al-B₂O₃-CeO₂-Fly Ash Composite Reinforced Coating

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