Effect of Droplet Characteristics and Substrate Surface Topography on the Final Morphology of Plasma-Sprayed Zirconia Single Splats
Effect of Droplet Characteristics and Substrate Surface Topography on the Final Morphology of Plasma-Sprayed Zirconia Single Splats
复制标题
液滴特性和基底表面形貌对等离子喷涂氧化锆单片最终形貌的影响
DOI：
10.1007/s11666-007-9035-6
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发表时间：
2007
影响因子：
3.1
通讯作者：
E. Moran
中科院分区：
文献类型：
--
作者：
H. Salimijazi;L. Pershin;Thomas W. Coyle;J. Mostaghimi;S. Chandra;Y. C. Lau;L. Rosenzweig;E. Moran
研究了大气等离子喷涂氧化钇稳定氧化锆单片的形貌。在三种不同温度（室温、300℃和600℃）下，在抛光的不锈钢衬底上收集了等离子喷涂zro2 -7% y2o3粉末的单片。评价了加热对衬底表面形貌的影响。研究了基体温度、颗粒温度、喷射速度等工艺参数对单片形貌的影响。研究了等离子喷涂足迹内的飞溅形状随位置的变化规律。分析了孔隙和微裂纹的形成、飞溅行为、碎屑/基体以及碎屑/碎屑界面。利用扫描电子显微镜和图像分析记录了飞溅形态和直径、卫星颗粒和飞溅行为。从聚焦离子束铣削制备的截面上研究了薄片/衬底和薄片/薄片界面。结果显示，在600°C衬底温度下，薄片/衬底界面主要呈圆盘状，没有分层迹象。重叠的薄片在薄片边界处显示有熔化（微焊接）的迹象。在所有喷涂条件下，薄片厚度均小于1 μm。
The morphology of atmospheric plasma-sprayed yttria-stabilized zirconia single splats has been studied. Single splats of plasma-sprayed ZrO2-7%Y2O3powder have been collected on polished stainless steel substrates kept at three different temperatures (room temperature, 300 °C, and 600 °C). The effect of heating on the substrates’ surface topography was evaluated. The effects of spray process parameters such as substrate temperature, particle temperature, and velocity on the morphology of single splats was studied. Variation of splat shape with location within the footprint of plasma spray was investigated. Pore and microcrack formation, splashing behavior, splat/substrate, and splat/splat interfaces were analyzed. Splat morphology and diameter, satellite particles, and splashing behavior were recorded using both scanning electron microscopy and image analysis. Splat/substrate and splat/splat interfaces were studied from cross sections prepared by focused ion beam milling. Results showed primarily disk-shape morphology and no evidence of delamination along the splat/substrate interface at 600 °C substrate temperature. Overlapped splats showed evidence of melting (microwelding) at splat boundaries. Splat thickness was measured to be less than 1 μm for all spray conditions.