Tribological wear of Fe-Al coatings applied by gas detonation spraying

IF 0.2 Q4 ENGINEERING, GEOLOGICAL
T. Chrostek
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引用次数: 2

Abstract

Comparative tests of gas detonation (GDS) coatings were carried out in order to investigate the influence of spraying parameters on abrasive wear under dry friction conditions. The tests were carried out using the pin-on-disc (PoD) method at room temperature. The microstructure of the coatings was analysed by X-ray diffraction (XRD) and scanning electron microscopy (SEM / EDS) methods. The results showed that with specific GDS process parameters, the main phases in both coatings were FeAl and Fe3Al involving thin oxide films Al2O3. The tribological tests proved that the coatings sprayed with the shorter barrel of the GDS gun showed higher wear resistance. The coefficient of friction was slightly lower in the case of coatings sprayed with the longer barrel of the GDS gun. During dry friction, oxide layers form on the surface, which act as a solid lubricant. The load applied to the samples during the tests causes shear stresses, thus increasing the wear of the coatings. During friction, the surface of the coatings is subjected to alternating tensile and compressive stresses, which lead to delamination and is the main wear mechanism of the coatings.
气体爆轰喷涂Fe-Al涂层的摩擦磨损
为研究干摩擦条件下气体爆轰(GDS)涂层的喷涂参数对磨料磨损的影响,进行了气体爆轰涂层的对比试验。试验采用针盘法(PoD)在室温下进行。采用x射线衍射(XRD)和扫描电镜(SEM / EDS)分析了涂层的微观结构。结果表明:在特定的GDS工艺参数下,两种涂层的主要相均为FeAl和Fe3Al,并伴有氧化膜Al2O3;摩擦学试验表明,采用GDS枪管短段喷涂的涂层具有较高的耐磨性。在GDS炮管较长的情况下,涂层的摩擦系数略低。干摩擦时,表面形成氧化层,起到固体润滑剂的作用。在测试过程中,施加在样品上的载荷会产生剪切应力,从而增加涂层的磨损。在摩擦过程中,涂层表面承受拉压交替应力,导致涂层脱层,这是涂层磨损的主要机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Archives for Technical Sciences
Archives for Technical Sciences ENGINEERING, GEOLOGICAL-
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