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首页> 外文期刊>Science and Technology of Advanced Materials >Adhesion of tin droplets impinging on a stainless steel plate: effect of substrate temperature and roughness
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Adhesion of tin droplets impinging on a stainless steel plate: effect of substrate temperature and roughness

机译：锡滴粘附在不锈钢板上的粘附力：基材温度和粗糙度的影响

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摘要

We photographed impact of small tin droplets on stainless steel surfaces of varying temperature and roughness. To achieve high impact velocities the test surfaces were mounted on the rim of a rotating flywheel. Substrate temperature (T_s) was varied from 120 to 220 ℃ and surface roughness (R_a) kept at either 0.05 or 2 μm. We kept constant the impact velocity (30 m/s) and droplet diameter (0.6 mm). To form a coating 60 droplets were deposited randomly on each stainless steel test coupon. Deposition efficiency was evaluated by dividing the mass adhering to the coupon by the mass of sixty droplets prior to impact. The maximum deposition efficiency was achieved at a substrate temperature of 160 ℃. For T_s < 160 ℃ the deposition efficiency was higher on a rough surface (R_a = 2 μm) than on a smooth surface (R_a = 0.05 μm), since splats did not adhere well to the smooth surface. For T_s ≥ 160 ℃ the deposition efficiency was higher on a smooth surface (R_a = 0.05 μm) than on a rough surface (R_a = 2 μm), since splats splashed less on the smooth surface.
机译：我们拍摄了小锡滴对温度和粗糙度变化的不锈钢表面的影响。为了实现高冲击速度，将测试表面安装在旋转飞轮的轮辋上。基板温度（T_s）在120到220℃之间变化，表面粗糙度（R_a）保持在0.05或2μm。我们保持恒定的冲击速度（30 m / s）和液滴直径（0.6 mm）。为了形成涂层，将60滴液滴随机沉积在每个不锈钢测试试样上。通过将附着在试样上的质量除以冲击前的60个液滴的质量来评估沉积效率。在基板温度为160℃时达到最大沉积效率。对于T_s <160℃，在粗糙表面（R_a = 2μm）上的沉积效率要比在光滑表面（R_a = 0.05μm）上的沉积效率高，这是因为splats不能很好地粘附在光滑表面上。当T_s≥160℃时，光滑表面（R_a = 0.05μm）上的沉积效率要高于粗糙表面（R_a = 2μm），这是因为飞溅在光滑表面上的飞溅较少。

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