【摘要】 为了提高粉煤灰作为增强材料在金属基复合材料中的应用和性能,通过热力学分析和正交优化试验确定Al-B₂O₃-CeO₂-粉煤灰复合增强涂层各成分之间可能发生的反应及最佳配方比例,采用等离子喷涂在ZG310-570基体制备了粉煤灰复合增强涂层,分析了粉煤灰复合增强涂层的表面形貌、物相和冲蚀磨损性能。结果发现,热力学分析和正交优化试验表明Al、B₂O₃、CeO₂和粉煤灰之间能发生固相反应,粉煤灰复合增强涂层配方最佳比例质量分数为粉煤灰55%、B₂O₃20%、Al20%、CeO₂5%;粉煤灰复合增强涂层呈凹凸不平的片层状结构,致密性好,存在纵向裂纹、未充分融化颗粒和孔隙;X射线分析表明粉煤灰复合增强涂层有Al₂O₃、CeB₆、2MgO·SiO₂、3CaO·B₂O₃等新相生成,与热力学分析结果一致;在一定冲蚀时间和冲蚀角度下,不同冲蚀转速时ZG310-570基体表面粉煤灰复合增强涂层的相对耐冲蚀磨损性能比基体分别至少提高了20.41倍、22.43倍和23.17倍。更多还原

【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, 2 MgO·SiO₂, 3 CaO·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.更多还原