Process optimisation of alumina coatings by modification of powder characteristics in the aerosol deposition method
Process optimisation of alumina coatings by modification of powder characteristics in the aerosol deposition method
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DOI：
10.1016/j.jeurceramsoc.2023.12.085
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发表时间：
2023-12
影响因子：
5.7
通讯作者：
Bingying Xie;Yizhe Li;Juncheng Pan;David A. Hall
中科院分区：
文献类型：
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作者：
Bingying Xie;Yizhe Li;Juncheng Pan;David A. Hall
气溶胶沉积过程涉及固体颗粒在基底上的高速冲击，是在室温下制造陶瓷涂层的有吸引力的方法。对于工艺优化，选择具有适当物理特性的粉末并评估沉积过程中的颗粒流动行为至关重要。在这项研究中，粉末改性过程中使用高能球磨和喷雾干燥，以提高适用性的前体粉末的开发和评估数值和实验。采用改进的气溶胶沉积系统，包括刷式气溶胶发生器，以保持气溶胶供应的连续性，并提高颗粒浓度的稳定性。当使用喷雾干燥颗粒（0.68%）代替原样粉末（0.26%）时，沉积效率几乎是三倍。从摩擦学测量，最强的界面结合也证实了与氧化铝颗粒制备的涂层。
The aerosol deposition process, involving the impact of solid particles on a substrate at high velocities, is an attractive method for the manufacture of ceramic coatings at room temperature. For process optimisation, it is crucial to select a powder having the appropriate physical characteristics and evaluate the particle flow behaviour during the deposition process. In this study, a powder modification process using high-energy milling and spray drying to improve the applicability of precursor powders was developed and evaluated both numerically and experimentally. A modified aerosol deposition system incorporating a brush-type aerosol generator was employed to maintain the continuity of the aerosol supply and improve the stability of the particle concentration. The deposition efficiency was nearly tripled when using spray-dried granules (0.68%) instead of the as-received powders (0.26%). From tribological measurements, the strongest interfacial bonding was also confirmed for coatings prepared with alumina granules.