Cold Gas Spraying of Ceramics Using the Example of Titanium Dioxide
Cold Gas Spraying of Ceramics Using the Example of Titanium Dioxide
复制标题
以二氧化钛为例的陶瓷冷气喷涂
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
T. Klassen
中科院分区：
文献类型：
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作者：
H. Gutzmann;S. Freese;F. Gärtner;T. Klassen
功能性二氧化钛涂层具有很高的光催化应用潜力。然而，常规热喷涂方法的高工艺温度导致不期望的相变。冷气喷涂似乎是有益的，因为对于陶瓷涂层，迄今为止还没有观察到相变。在这项研究中，冷喷涂陶瓷颗粒在金属基体上的结合阐述了通过调查从擦拭试验获得的单次冲击。使用由团聚的二氧化钛纳米颗粒组成的不同原料粉末。采用扫描电子显微镜和共聚焦显微镜研究了单颗粒碰撞。结果表明，基体材料、基体温度、粉末性能和喷涂条件对颗粒间的结合有影响。此外，粉末特性似乎特别重要。结果允许冷喷涂陶瓷的有利条件的结论。
Functional titanium dioxide coatings have a high potential for photocatalytic applications. However, the high process temperatures of conventional thermal spray methods lead to undesirable phase transformations. Cold gas spraying seems to be beneficial, since for ceramic coatings no phase transformations have been observed so far. In this study, bonding of cold-sprayed ceramic particles on metal substrates is elucidated by investigating single impacts obtained from wipe tests. Different feedstock powders were used, consisting of agglomerated titanium dioxide nanoparticles. The single particle impacts were investigated by scanning electron microscopy and confocal microscopy. The results demonstrate that bonding of particles is influenced by the substrate material, substrate temperature, powder properties and spray conditions. In addition, powder characteristics seem to be of particular importance. The results allow for conclusions regarding favorable conditions for cold spraying of ceramics.