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首页> 外文会议>Thermal Spray Solutions: Advances in Technology and Application >The Microstructure and High Temperature Sliding Wear Behavior of Fe-Al CoatingProduced by High Velocity Arc Spraying
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The Microstructure and High Temperature Sliding Wear Behavior of Fe-Al CoatingProduced by High Velocity Arc Spraying

机译：高速电弧喷涂Fe-Al涂层的组织和高温滑动磨损行为

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The microstructure and sliding wear behavior from room temperature up to 650°C of Fe-Al intermetalliccoating produced by cored wire and high velocity arc spraying (HVAS) have been investigated. X-ray diffraction(XRD), energy dispersion spectroscope (EDS), optical microscopy (OM) and scanning electron microscopy (SEM)were used to analyze the microstructure and sliding friction and wear mechanism of the coatings. Chemical analysisof the coating indicated the composition to be Fe-20.0Al-14.1O (at.%). The microstructure was found to consist ofFe3Al, FeAl and α-Fe regions mainly, together with fine oxide (Al2O3) layers and a little Al. The results of sliding wearindicated that the Fe-Al coating exhibited low friction coefficient and low wear rate at elevated temperatures. Thereason of the friction coefficient decreasing at elevated temperatures is that protective oxide film formed on the wornsurface during sliding wear process. And delamination is the predominant wear mechanism of the coatings. TheFe3Al and FeAl intermetallics which have higher strength and hardness at elevated temperatures can effectivelyresist crack initiation, propagation and splat fracture, thus resulting in excellent high temperature wear resistance ofthe Fe-Al coating.
机译：室温高达650°C的微观结构和滑动磨损行为为Fe-Al金属间金属间 已经研究了通过芯线和高速电弧喷涂（HVA）产生的涂层。 X射线衍射 （XRD），能量分散镜（EDS），光学显微镜（OM）和扫描电子显微镜（SEM） 用于分析涂层的微观结构和滑动摩擦和磨损机理。化学分析 涂层表明该组合物是Fe-20.0Al-14.1O（at。％）。发现微观结构组成 FE3AL，FEAL和α-FE区主要与细氧化物（AL2O3）层和一点A1一起。滑动磨损的结果 表明，Fe-Al涂层在升高的温度下表现出低摩擦系数和低磨损率。这 升高温度下降的摩擦系数的原因是在磨损上形成的保护氧化物膜 滑动磨损过程中的表面。分层是涂层的主要磨损机理。这 FE3AL和FEAL金属间金属间在升高的温度下具有更高的强度和硬度可以有效 抵抗裂纹启动，传播和平移骨折，从而导致优异的高温耐磨性 Fe-Al涂层。

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