Functional Ceramic Coatings Deposited by Solution Precurser Plasma Spray

溶液前驱体等离子喷涂沉积的功能陶瓷涂层

• 批准号: RGPIN-2015-06377
• 负责人: Coyle, Thomas
• 金额: $ 2.55万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=708181
• 关键词: Functional; Ceramic; Coatings; Deposited; Solution

Solution precursor plasma spraying (SPPS) is a process capable of depositing coatings of almost anycomposition by injecting solutions of precursor salts corresponding to the desired coating composition into a DC-arc plasma. The rapid formation of the solid from the solution results in extremely fine crystallite sizes, typically on the order of 20-30 nm. Coating structures can range from extremely high porosities to nearly completely dense. However, a number of complex phenomena are involved and significant challenges exist in understanding and controlling the process in order to be able to reliably deposit coatings of the desired structure, composition, and properties. The proposed research programme will extend and expand our recent work in SPPS. There are two major objectives. One is to further develop and demonstrate the potential of this process to produce unique, high performance deposits of for specific applications. Of particular interest is the electrochemical performance of functional ceramic coatings as electrodes in ultra-capacitors and Li-ion batteries. The second major objective is to develop a better understanding of the phenomena involved in the process through coupling of experiments, diagnostics, and characterization of coating microstructures with numerical modelling of the evaporation, break-up and collision of droplets in the plasma, the precipitation of product phases in the droplets, the heating, melting, and impact of the particles on the substrate.

溶液前体等离子喷涂 (SPPS) 是一种能够通过将与所需涂层成分相对应的前体盐溶液注入直流电弧等离子体中来沉积几乎任何成分的涂层的工艺。从溶液中快速形成固体，从而产生极细的涂层。微晶尺寸通常为 20-30 nm，涂层结构的范围可以从极高的孔隙率到几乎完全致密，但是，其中涉及许多复杂的现象，并且在理解和控制该过程方面存在重大挑战。到可靠地沉积具有所需结构、成分和性能的涂层。 拟议的研究计划将扩展和扩展我们最近在 SPPS 方面的工作，主要目标有两个：一是进一步开发和展示该工艺为特定应用生产独特的高性能沉积物的潜力。功能陶瓷涂层作为超级电容器和锂离子电池电极的性能第二个主要目标是通过将实验、诊断和涂层微观结构表征与数值模拟相结合，更好地理解该过程中涉及的现象。等离子体中液滴的蒸发、破碎和碰撞，液滴中产物相的沉淀，颗粒的加热、熔化和对基底的撞击。