Effect of Substrate Surface Change on Flattening Behaviour of Thermal Sprayed Particles
Effect of Substrate Surface Change on Flattening Behaviour of Thermal Sprayed Particles
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DOI：
10.2320/matertrans.45.1869
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发表时间：
2004-06
影响因子：
1.2
通讯作者：
M. Fukumoto;I. Ohgitani;T. Yasui
中科院分区：
文献类型：
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作者：
M. Fukumoto;I. Ohgitani;T. Yasui
我们在研究中指出，在实际粉末材料的热喷涂过程中，在一个临界衬底温度范围内，飞溅形状会从飞溅形状过渡到圆盘形状。基片温度的升高可能伴随着基片表面上的某些东西的变化，因为这种变化效应一直保持到基片冷却到室温。因此，加热引起的基片表面的某种不可逆变化可能是热喷涂颗粒扁平化过程中转变现象的可能控制因素。利用原子力显微镜(AFM)、X射线光电子能谱(XPS)和俄歇电子能谱(俄歇电子能谱)对加热至673K的AISI304钢基材表面进行了精确分析。结果表明，衬底表面的变化不是发生在化学成分上，而是主要发生在表面粗糙度上，尤其是纳米级的表面形貌。衬底加热可能会引起衬底表面物理方式的变化，而这种变化会导致跃迁现象。
We have pointed out in our research that in the thermal spraying of practical powder materials, the splat shape change transitionally to a disk shape from a splash shape on a critical substrate temperature range. Substrate temperature increasing may accompany the change in something on the substrate surface, because the changing effect is maintained till the substrate is cooled down to the room temperature. Thus, a certain non-reversible change in substrate surface due to the heating might be the possible domination for the transition phenomenon in the flattening of thermal sprayed particles. In this study, AISI304 steel substrate surface once heated to 673 K was analyzed precisely by atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS) and auger electron spectroscopy. The results obtained revealed that the change of the substrate surface occurred not in the chemical composition but mainly in the surface roughness, especially surface morphology in nano-meter scale. Substrate heating may bring about the change in the physical way on the substrate surface and this change induces the transition phenomenon.