Surface roughness of thermal spray coatings made with off-normal spray angles
Surface roughness of thermal spray coatings made with off-normal spray angles
复制标题
非正常喷涂角度热喷涂层的表面粗糙度
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
T. Roemer
中科院分区：
文献类型：
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作者：
M. Kanouff;R. Neiser;T. Roemer
分析了采用偏离法向角喷涂的热喷涂涂层的形成过程，找出了涂层表面粗糙度大的原因。在分析中，弦的方法被用来模拟涂层的形成。该方法使用一串等间距的节点来限定涂层表面的形状，并在沉积热喷涂物质时跟踪该形状的变化。该方法允许计算可能非常复杂的涂层表面的任意形状。该模型模拟了大量热喷涂液滴的随机沉积。通过实验获得了用于靶面质量通量分布模型的数据。数据显示，当热喷涂质量撞击在目标表面上时，其中的大部分（称为过喷）从目标飞溅并且以小的方向角重新沉积。沉积物质的该成分导致大的涂层粗糙度。
The formation of a thermal spray coating using an off-normal direction angle for the spray has been analyzed to identify the causes of the large surface roughness of the coating. In the analysis, the string method was used for modeling the formation of the coating. The method uses a string of equally spaced node points to define the shape of the coating surface and to track the change in this shape as the thermal spray mass is deposited. The method allows for the calculation of arbitrary shapes for the coating surface that may be very complex. The model simulates the stochastic deposition of a large number of thermal spray droplets. Experiments were carried out to obtain the data used in the model for the mass flux distribution on the target surface. The data show that when the thermal spray mass impinges on the target surface a large fraction of it, called overspray, splashes off the target and is redeposited with a small direction angle. This component of the deposited mass results in a large coating roughness.