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首页> 外文期刊>DVS-Berichte >Influence of gas temperature, particle size and substrate material on the deposition behaviour of cold sprayed magnesium coatings
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Influence of gas temperature, particle size and substrate material on the deposition behaviour of cold sprayed magnesium coatings

机译：气体温度，粒度和底材对冷喷涂镁涂层沉积行为的影响

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摘要

Magnesium coatings were deposited upon aluminum and stainless steel substrates by cold spraying. Three Mg powders with different particle size distributions were used as feedstock. The microstructures of as-sprayed coatings were evaluated by optical microscopy, and scanning electron microscopy. The coating observations show that a main gas temperature has an important effect on the deposition behaviour of particles. Changing the gas temperature from 350℃ to 630℃ involves an increase of the deposition efficiency from 1.57% to 19.57%. The effects of the particle size distribution and substrate material on the deposition efficiency of particles were also investigated. The results show that the particle size distribution has a significant effect on the deposition efficiency of particles which increases from 19.57% to 59% when the mean particle size decreases from 63 μm to 38 μm under gas temperature of 630℃. However, the deposition efficiency of particles was slightly influenced by the substrate material. In addition to these experimental results, the in-flight particle velocities were simulated by FLUENT software to point out the effects of the gas temperature and particle size distribution.
机译：通过冷喷涂将镁涂层沉积在铝和不锈钢基底上。使用三种具有不同粒度分布的Mg粉末作为原料。通过光学显微镜和扫描电子显微镜评价喷涂后的涂层的微观结构。涂层观察表明，主要气体温度对颗粒的沉积行为具有重要影响。将气体温度从350℃更改为630℃会使沉积效率从1.57％提高到19.57％。还研究了粒度分布和基质材料对颗粒沉积效率的影响。结果表明，在630℃的气体温度下，当平均粒径从63μm减小到38μm时，粒径分布对颗粒的沉积效率有显着影响，从19.57％增加到59％。但是，颗粒的沉积效率受基材的影响很小。除了这些实验结果外，还通过FLUENT软件模拟了飞行中的粒子速度，以指出气体温度和粒径分布的影响。

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