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首页> 外文期刊>DVS-Berichte >Comparison of Al_2O_3 and Al_2O_3-TiO_2 coatings manufactured by aqueous and alcoholic Suspension Plasma Spraying
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Comparison of Al_2O_3 and Al_2O_3-TiO_2 coatings manufactured by aqueous and alcoholic Suspension Plasma Spraying

机译：水性和酒精悬浮等离子喷涂制备的Al_2O_3和Al_2O_3-TiO_2涂层的比较

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摘要

Alumina-titania plasma spray coatings are widely used for their tribological performances. The combination of these two ceramics in a particular mix percentage permits to manufacture coatings with better wear resistance in comparison to those made of pure alumina. Suspension plasma spraying permit to manufacture sub-micrometer structure coatings very fine structure thanks to precursors which have an initial size of 10 to 300 nm. The use of a liquid feestock, aqueous or alcoholic, allows the use of nanometer particles directly without the need to agglomerate them to obtain conventional nanostructured micrometer-sized powders. This study aims at studying Al_2O_3 and Al_2O_3-TiO_2 coatings made from aqueous and alcoholic suspensions produced by suspension plasma spraying. Microsctures and phase evolutions are considered. Manufactured coatings present different architectures depending of operating parameters and feedstock particle sizes; the lower the particle diameter, the thinner the microstructure. Phases composition are discussed and compared to conventional micrometer-sized structure Al_2O_3 and Al_2O_3-TiO_2 coatings.
机译：氧化铝-二氧化钛等离子喷涂涂料因其摩擦学性能而被广泛使用。与纯氧化铝制成的涂层相比，这两种陶瓷在特定的混合百分比下的组合可以制造出具有更好耐磨性的涂层。由于初始尺寸为10到300 nm的前驱体，悬浮等离子喷涂可以制造非常精细的亚微米结构涂层。使用含水或含酒精的液态原料可以直接使用纳米颗粒，而无需将它们团聚以获得常规的纳米级微米级粉末。这项研究旨在研究由悬浮液等离子喷涂产生的水性和醇性悬浮液制成的Al_2O_3和Al_2O_3-TiO_2涂层。考虑了显微组织和相演化。根据操作参数和原料颗粒大小，制成的涂料具有不同的结构。粒径越小，显微组织越薄。讨论了相组成并将其与常规的微米级结构Al_2O_3和Al_2O_3-TiO_2涂层进行了比较。

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