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Critical Velocity Window for the Deposition of Iron-Based Metallic Glass Particles Using Cold Spray

机译:使用冷喷雾沉积铁基金属玻璃颗粒的关键速度窗口

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This study investigates the feasibility of forming amorphous iron-based coatings using the cold spray deposition process. Splat tests of cold-sprayed SAM1651 (Fe_(48)Mo_(14)Cr_(15)Y_2C_(15)B_6 at.%) particles impacting a mild steel substrate were performed using varying gas temperatures and particle diameters. Specimen inspection by scanning electron microscopy revealed splat morphologies that varied from well-adhered particles to substrate craters formed by rebounded particles. Particle flow was analyzed using a finite element model, and impact conditions were predicted using an experimentally validated analytical model, in empirically generating a temperature/velocity window of successful particle deposition as a framework for ongoing work on the formation of cold-sprayed SAM1651 coatings. The results indicate that the unique characteristics of the cold spray process offer a promising means for the formation of metallic glass coatings that successfully retain the amorphous structure, as well as the superior corrosion and wear resistant properties of the feedstock powder.
机译:本研究研究了使用冷喷雾沉积工艺形成无定形铁基涂层的可行性。使用不同的气体温度和颗粒直径来进行撞击低碳钢基板的冷喷涂SAM1651(FE_(48)MO_(14)CR_(15)Y_2C_(15)B_6)的SPLAT试验。通过扫描电子显微镜检查样本检查显示从粘附的颗粒变化到由反弹颗粒形成的基板陨石片变化的Splat形态。使用有限元模型进行分析颗粒流动,使用实验验证的分析模型预测了冲击条件,在经验地产生成功粒子沉积的温度/速度窗口作为持续工作的框架,用于形成冷喷涂的SAM1651涂层。结果表明,冷喷工艺的独特特性提供了用于形成成功保留非晶结构的金属玻璃涂层的承诺手段,以及原料粉末的卓越腐蚀和耐磨性。

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