Comparison Between High-Velocity Suspension Flame Spraying and Suspension Plasma Spraying of Alumina
Comparison Between High-Velocity Suspension Flame Spraying and Suspension Plasma Spraying of Alumina
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DOI：
10.1007/s11666-012-9783-9
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发表时间：
2012-12-01
影响因子：
3.1
通讯作者：
Gadow, Rainer
中科院分区：
文献类型：
--
作者：
Mueller, Philipp;Killinger, Andreas;Gadow, Rainer
悬浮等离子喷涂（SPS）和高速悬浮火焰喷涂（HVSFS）是悬浮喷涂领域的研究热点。这两种技术都适用于制造结构精细的涂料。这两种工艺的颗粒速度和温度的差异导致涂层特性的变化。HVSFS工艺的高颗粒速度导致涂层更致密，孔隙率更低。具有更高且均匀孔隙率的涂层，可以由SPS产生，也具有很高的潜力，例如，用于热障涂层。在本研究中，以氧化铝为原料，混合不同溶剂，比较了sps和hvsfs两种工艺。除了表征涂层的微观结构和相组成外，本研究的重点是研究颗粒在飞行中的熔化行为和单片特征。
Two different spray processes-suspension plasma spraying (SPS) and high-velocity suspension flame spraying (HVSFS)-are under focus in the field of suspension spraying. Both techniques are suitable for manufacturing finely structured coatings. The differences in the particle velocity and temperature of these two processes cause varying coating characteristics. The high particle velocity of the HVSFS process leads to more dense coatings with low porosity values. Coatings with a higher and also homogeneous porosity, which can be generated by SPS, have also high potential, for example, for thermal barrier coatings. In this study, both the processes-SPS and HVSFS-were compared using alumina as feedstock material mixed with different solvents. Besides the characterization of the microstructure and phase composition of the applied coatings, the focus of this study was the investigation of the melting behavior of the particles in-flight and of single splat characteristics.