Influence of Ni and Cr on the high-temperature wear resistance of FeNiCrAl coatings
Influence of Ni and Cr on the high-temperature wear resistance of FeNiCrAl coatings
复制标题
Ni、Cr对FeNiCrAl涂层高温耐磨性能的影响
DOI：
10.1016/j.rinp.2018.12.061
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发表时间：
2019-03-01
影响因子：
5.3
通讯作者：
Xu Binshi
中科院分区：
文献类型：
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作者：
Tian Haoliang;Wang Changliang;Xu Binshi
为了降低Fe-Al金属间化合物涂层的脆性，将Ni和Cr元素整合到Fe-Al金属间化合物中，研制了高速电弧喷涂用FeNiCrAl粉末丝材。采用高速电弧喷涂技术制备了相应的FeNiCrAl涂层。选择3Cr 13涂层作为对比材料，研究了两种涂层在200 ~ 800 ℃温度范围内的摩擦磨损性能。通过X射线衍射仪（XRD）、硬度测试、扫描电子显微镜（SEM）和能谱仪（EDS）分析了两种涂层的摩擦系数变化和摩擦表面形貌。用X射线光电子能谱（XPS）分析了磨损表面材料的相组成。结果表明，FeNiCrAl涂层的摩擦系数在400 ℃达到峰值后，随温度升高而下降，其磨损体积小于3Cr 13涂层。XPS磨损表面成分分析和SEM磨痕形貌分析结果表明，FeNiCrAl涂层在高温摩擦过程中不仅生成Fe、Ni和Cr的氧化物，而且生成Ni-Al金属间化合物。FeNiCrAl涂层的摩擦系数在800 ℃达到峰值后，在Fe 3Al周围形成更多的Al 2 O3，这些化合物聚集形成保护膜，有效防止O离子的进一步侵入。磨损表面形成致密的氧化物层，硬质相化合物的形成提高了涂层的耐磨性和承载能力。
To reduce the brittleness of Fe-Al intermetallic compound coatings, FeNiCrAl powder wire for high-speed electric arc spraying is developed by integrating Ni and Cr into an Fe-Al intermetallic compound. The corresponding FeNiCrAl coating is prepared via high-speed electric arc spraying technology. A 3Cr13 coating is selected as the material for comparison, and the friction and wear properties of the two coatings are investigated from 200 degrees C to 800 degrees C. The friction coefficient variations and friction surface topography patterns of the two coatings are analyzed via X-ray diffractometry (XRD), hardness testing, and scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS). The phase compositions of the materials on the wear surfaces are analyzed via X-ray photoelectron energy spectrometry (XPS). The results show that after the friction coefficient of the FeNiCrAl coating reaches its peak value at 400 degrees C, it declines with increasing temperature, and its wear volume is less than that of the 3Cr13 coating. An XPS-based wear surface composition analysis and SEM wear scar topography results show that the FeNiCrAl coating produces not only Fe, Ni and Cr oxides but also Ni-Al intermetallic compounds during high-temperature friction. After the friction coefficient of the FeNiCrAl coating reaches its peak at 800 degrees C, more Al2O3 is formed around the Fe3Al, and these compounds aggregate to form a protective film that effectively prevents further intrusion of O ions. A dense oxide layer covers the wear surface, and the formation of hard-phase chemical compounds improves the wear resistance and bearing capability of the coating.