| 摘要: |
| 采用纳米氧化铝(粉末直径约20nm)悬浮液大气等离子喷涂技术(SPS)制备了含纳米结构的涂层.采用理论计算、SEM分析的方法研究纳米氧化铝悬浮液浓度对涂层构建的影响.结果表明,纳米氧化铝悬浮液浓度对粒子直径的分布,喷涂悬浮液所需的等离子能量,涂层表面粗糙度以及涂层显微结构都有显著的影响,降低悬浮液浓度有利于获得精细的涂层结构,但喷涂效率降低,优化的悬浮液浓度(质量分数,%)在5~10. |
| 关键词: 纳米氧化铝 悬浮液浓度 等离子喷涂 涂层构建 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(50775106);湖南省自然科学基金资助项目(03JJY3121) |
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| Influence of nano-Al2O3 suspension concentration on forming of plasma spraying coating |
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FAN Xiangfang, QIU Changjun, CHEN Yong
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College of Mechanical Engineering, Nanhua University, Hengyang 421001, China
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| Abstract: |
| The nano-alumina coating was prepared by suspension plasma spraying under atmospheric conditions, and the effect of nano-Al2O3 suspension concentration on forming of plasma spraying coating was studied by scanning electron microscopy and theory analyses.The results show that the concentration of nano-Al2O3 suspension has a significant influence on the size of droplet, the enthalpy needed for spraying suspension, the roughness of coatings surface and the microstructure of coatings.Low concentration of the suspension is beneficial for fine nanostructures coatings, which means low spraying efficiency.The optimized concentration of nano-alumina suspension is between 5%(wt) and 10%(wt). |
| Key words: nano-alumina suspension concentration plasma spraying coating forming |
