STTR Phase I: Direction and Profile Control for Thermal Sprays

STTR 第一阶段：热喷涂的方向和轮廓控制

• 批准号: 0740822
• 负责人: Angela Minichiello
• 金额: --
• 依托单位: CASTLEROCK ENGINEERING
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-01-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0740822&HistoricalAwards=false
• 关键词: STTR; Phase; Direction; Profile; Control

This Small Business Technology Transfer (STTR) Phase I project aims to apply the unique property of high-speed jets to adhere to nearby curved surfaces, with a turning radius much larger than the size of the jet - the so-called COANDA effect. The proposed research aims to take advantage of this effect to manipulate thermal spray jet stream and vector the stream such that the hot thermal gas stream can be effectively bent away from the surface to be coated while allowing the heated powders to strike the surface to product the coating. The benefit of this approach is in being able to maintain the substrate at a temperature that allows a hard coating to be applied to the surface without excessively heating the part. This would allow the process to be applied to a wide variety of thermally sensitive substrate materials. Other advantages include improved stability of thermal sprays, better control of the coating process and ability to operate in confined spaces and harsh environments. The broader impacts of this technology, if successful, will be in the $3.5 billion thermal spray coating market, which serves a wide range of critical applications, including aerospace components, from landing gears, engine hot-section parts and other components subjected to hot corrosion and thermo-mechanical degradation in service; automotive components, medical implants, electronics. The ability to manipulate thermal jets will be further enhanced by the addition of robotic controls that allow coating of intricate parts, confined environments and improved spray coatings.

这个小企业技术转让（STTR）第一阶段项目旨在应用高速喷气机的独特性能来附着在附近的曲面上，其转弯半径远大于喷气机的尺寸-即所谓的COANDA效应。所提出的研究旨在利用这种效应来操纵热喷涂射流并引导该流，使得热的热气流可以有效地弯曲远离待涂覆的表面，同时允许加热的粉末撞击表面以产生涂层。这种方法的好处是能够将基材保持在允许将硬涂层施加到表面而不过度加热部件的温度下。这将允许该方法应用于各种热敏基底材料。其他优点包括提高热喷涂的稳定性，更好地控制涂层过程以及在有限空间和恶劣环境中操作的能力。如果成功，这项技术的更广泛影响将是35亿美元的热喷涂市场，该市场适用于广泛的关键应用，包括航空航天部件，从起落架，发动机热部件和其他在服务中受到热腐蚀和热机械降解的部件;汽车部件，医疗植入物，电子产品。通过增加机器人控制装置，可以对复杂部件进行涂层，限制环境和改进喷涂，将进一步增强操纵热射流的能力。