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Deposition of TiO_2 Ceramic Particles on Cold Spray Process

机译：TiO_2陶瓷颗粒的冷喷涂沉积

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摘要

Cold spraying has been developed as a high-quality coating process. However, the deposition materials were limited as metallic materials. In this paper, titanium dioxide (TiO_2) ceramic particles are deposited on several substrate materials and formed thick coatings, making this approach suitable for a wide range of photocatalytic applications. In order to understand the adhesion mechanism of solid ceramic particles, the structure of feedstock particles are carefully observed with a scanning electron microscope (SEM) and a high-resolution transmission electron microscope (TEM). We find a porous structure which is agglomerated with nano-scaled primary particles. It is assumed that the break down phenomenon occurs due to the cold spray process and influences the adhesion of ceramic particles. The primary particles are bonded within a single crystal. This particular structure is the main factor to make adhesion between the particle and the substrate. SEM and TEM datas clearly reveal adhesion mechanisms related to the impact of spraying ceramic particles toward the substrate.
机译：冷喷涂已发展成为一种高质量的涂层工艺。然而，沉积材料被限制为金属材料。在本文中，将二氧化钛（TiO_2）陶瓷颗粒沉积在几种基材上并形成厚涂层，从而使该方法适用于广泛的光催化应用。为了理解固体陶瓷颗粒的粘附机理，用扫描电子显微镜（SEM）和高分辨率透射电子显微镜（TEM）仔细观察了原料颗粒的结构。我们发现多孔结构与纳米级的初级粒子团聚。假定由于冷喷涂过程而发生分解现象，并影响陶瓷颗粒的附着力。初级粒子结合在单晶内。这种特殊的结构是在颗粒和基材之间形成粘附力的主要因素。 SEM和TEM数据清楚地揭示了与向基底喷涂陶瓷颗粒的影响有关的粘附机理。

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