用液体原料等离子喷涂制备含纳米组分的复合涂层

R. Mušálek, T. Tesar, J. Medricky, J. Cizek, F. Lukáč
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引用次数: 0

摘要

等离子喷涂的液体原料允许沉积具有新的微观结构的材料。由于液体载体和超细粉末的结合(在悬浮液的情况下)或最终材料在等离子体射流中的原位形成(在溶液的情况下),超细复合材料的制备是可能的,通常以涂层的形式出现在基材上。此外,悬浮液和溶液两种喷涂方式可以很容易地结合在一起,甚至可以与传统的粗干粉等离子喷涂相结合,从而在最终的复合微观结构中融合了“纳米”和“微米”成分的优点。因此,液体给料等离子喷涂代表了一种具有广泛可变性的工业相关沉积工艺,提供了适合各种应用的涂层,包括紧凑耐磨层、多孔热障涂层、生物相容性医疗涂层、催化剂载体、燃料电池等。本文介绍了近年来在IPP CAS上利用混合式水稳定等离子体炬沉积超细涂层的几个实例。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Composite coatings containing nanometric constituents prepared by plasma spraying with liquid feedstocks
Plasma spraying of liquid feedstocks allows deposition of materials with novel microstructures. Due to the combination of a liquid carrier and ultrafine powders (in case of suspensions) or in-situ formation of the final material in the plasma jet (in case of solutions), preparation of ultrafine composites is possible, typically in a form of coatings on the substrates. Moreover, both suspension and solution spraying routes can be easily combined, either together or even with conventional plasma spraying of coarse dry powders, thus merging benefits of “nanometric” and “micrometric” constituents in the final composite microstructure. As a consequence, liquid feedstock plasma spraying represents an industrially-relevant deposition process with wide variability, providing coatings with properties tailored for various applications ranging from compact wearresistant layers, porous thermal barrier coatings, bio-compatible medical coatings, catalyst carriers, fuel-cells, etc. The paper introduces several examples of such ultrafine coatings recently deposited at IPP CAS using hybrid water-stabilized plasma torch.
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