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Erosion, abrasive and friction wear behaviour of iron aluminide coatings sprayed by HVOF

机译:HVOF喷涂的铝化铁涂层的冲蚀,磨蚀和摩擦磨损行为

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摘要

Iron aluminides have been lately proposed as promising materials for wear applications. Many authors have focused their investigations on the friction behaviour of FeAl coatings emphasizing the role of this intermetallic as a new matrix to embed ceramic particles and replace for high temperature the extensively studied WC-Co cermet system. However, few works deal with the evaluation of the different tribological properties and their relationship with the coating microstructure. Thus, in the present study, the near stoichometric Fe{sub}40Al was successfully sprayed by means of HVOF using different spraying parameters and the tribological behaviour was assessed through solid particle erosion, abrasive and dry sliding tests. The wear mechanisms that took place in the produced coatings are discussed with regard to the obtained results. The friction coefficient versus sliding distance was obtained. In addition, isothermally treated samples in air were tested showing both lower friction coefficient and lower wear rate.
机译:铝铁化物最近被提出作为用于磨损应用的有前途的材料。许多作者将研究重点放在FeAl涂层的摩擦性能上,强调了这种金属间化合物作为嵌入陶瓷颗粒并替代高温的广泛研究的WC-Co金属陶瓷体系的新基质的作用。但是,很少有研究处理不同的摩擦学性能及其与涂层微观结构的关系。因此,在本研究中,通过使用不同的喷涂参数的HVOF成功地喷涂了接近化学计量的Fe {sub} 40Al,并通过固体颗粒腐蚀,磨蚀和干滑试验评估了摩擦学行为。关于获得的结果,讨论了在产生的涂层中发生的磨损机理。获得了摩擦系数与滑动距离的关系。另外,测试了在空气中经过等温处理的样品,它们显示出较低的摩擦系数和较低的磨损率。

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