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首页> 外文期刊>Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear >Wear behaviour of nanostructured alumina-titania coatings deposited by atmospheric plasma spray
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Wear behaviour of nanostructured alumina-titania coatings deposited by atmospheric plasma spray

机译：大气等离子喷涂沉积的纳米结构氧化铝-二氧化钛涂层的磨损行为

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摘要

Dry sliding wear performance of Al{sub}2O{sub}3-13% TiO{sub}2 nanostructured and conventional coatings has been experimentally analysed. An enhanced behaviour of the nanostructured material can be reported with substantially minor wear rates under all experimental conditions. Additionally, a transition from mild to severe wear can be established in both materials. However, the critical pressure at which the transition occurs is higher for the nanocoating. The main wear mechanisms controlling the mild and the severe regimes are related to brittle propagation of cracks. The hierarchical structure showed by the nanomaterial seems to control the improvements mentioned before. Crack deflection processes leading to a toughening effect can be identified, although, the microstructural feature which deflects the cracks changes depending on the wear regime.
机译：实验研究了Al {sub} 2O {sub} 3-13％TiO {sub} 2纳米结构和常规涂层的干滑动磨损性能。可以报​​告在所有实验条件下，纳米结构材料的行为均得到改善，且磨损率基本较小。此外，两种材料均可实现从轻度磨损到严重磨损的过渡。但是，对于纳米涂层，发生转变的临界压力较高。控制轻度和重度状态的主要磨损机制与裂纹的脆性扩展有关。纳米材料显示的分层结构似乎控制了前面提到的改进。尽管可以确定导致挠曲效果的裂纹挠曲过程，但使裂纹挠曲的微观结构特征会根据磨损状况而变化。

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