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由于APS工艺条件导致的涂层组成的变化,Al₂O₃-Cr₂O₃-TiO₂三级粉末混合物

Maximilian Grimm¹, Susan Conze², Lutz-Michael Berger²

¹Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, 09107 Chemnitz, Germany.

Journal of thermal spray technology

|April 16, 2024

概括

塑喷雾三元氧化物涂层 (Al2O3-Cr2O3-TiO2) 显示了组成的不稳定性. 由于氧化物化的差异,增加气流速会极大地改变涂层构成,影响多功能性质.

科学领域:

材料科学材料科学材料科学
表面工程是什么?表面工程是什么?
陶涂层陶涂层陶涂层

背景情况:

来自Al2O3-Cr2O3-TiO2系统的热喷涂层提供了多功能性质.
三元组合是提高涂层性能的关键.
在喷期间的组成稳定性对于混合原料粉末至关重要.

研究的目的:

在大气等离子体喷射 (APS) 过程中研究三元Al2O3-Cr2O3-TiO2粉末混合物的组成变化.
了解不同流速对涂层组成,微观结构和性能的影响.
分析氧化物特性 (如化难度和热扩散性) 在构成稳定性中的作用.

主要方法:

大气等离子喷射 (APS) 是一种三元混合的Al2O3,Cr2O3和TiO2粉末.
在保持恒定的气流速的同时,气流速的变化.
分析涂层组成 (EDS),微观结构 (光学显微镜,SEM),相位 (XRD),硬度和电阻.

主要成果:

增加气流速显著改变了涂层成分,将Al2O3含量降低到8重%,而Cr2O3保持稳定.
由于TiO2的氧化而形成的固态度TiO2,受Ar/H2比率的影响.
观察到大型氧化物颗粒之间的有限相互作用,在Cr2O3斑块中发现了.

结论:

在APS过程中三元氧化物粉末混合物的化学成分稳定性对工艺条件,特别是流速非常敏感.
氧化物化因子的难度和热扩散度的差异导致组合变化.
优化APS参数对于从混合原料中获得所需的涂层组成和性能至关重要.

关键词:

陶涂层是一种陶涂层.微观结构的微观结构射等离子体喷方式消毒过程的分析分析.三元组成的三元组合.

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