Sealing of porous structure by hybrid aerosol deposition

The hybrid aerosol deposition (HAD) process is an improved process of aerosol deposition process by plasma enhancement, enabling the deposition of ceramic coatings. The HAD process utilizes a mesoplasma flow, which is a transitional plasma from thermal plasma to low-pressure plasma, to enhance particle deposition efficiency and capability of three-dimensional coverage. In this process, the surface of fine solid particles is activated by the mesoplasma flow, while the core of the particles is kept solid without melting during flight. This surface activation of particles contributes to increase their sticking probability, which plays important roles in the increase in the deposition efficiency and the enhancement of the capability of three-dimensional coverage. This deposition mechanism is unique and different from either melt deposition or solid consolidation, which creates new opportunities for deposition of fine ceramic coatings. As an example, we would like to show HAD process can be used for sealing of porous structure.
3 subject-areas: 4. 10 New Processes; 2.3 Ceramic Coatings; 2.9 Comparison Thermal Spraying vs. other Surface Technologies