Research Equipment (REG): A High Power Laser and Microscopic Image Analysis System

研究设备 (REG)：高功率激光和显微图像分析系统

• 批准号: 9213161
• 负责人: Klod Kokini
• 金额: $ 11.64万
• 依托单位: Purdue Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-11-01 至 1994-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9213161&HistoricalAwards=false
• 关键词: Research; Equipment; REG; Power; Laser

A high power laser and microscopic image analysis system will be used to perform controlled experiments on multilayered ceramic thermal barrier coatings. These coatings are developed for high- temperature applications such as diesel engines, jet engines and gas turbines used in land and aerospace vehicles. Current research performed by subjecting coated specimens to low heat fluxes has resulted in identifying some of the failure modes. It is now necessary to subject similar specimens, as well as specimen with thin multi-layer coatings to large heat fluxes in order to obtain larger temperatures and temperature gradients. The cracking process occurring during the application of the high heat flux will be quantified interactively using the microscopic image analysis system. The fundamental understanding that this research will provide will be used to develop and design multilayer coatings with a significantly longer life under high temperature. The second program is a multidisciplinary investigation to develop a thermally enhanced processing technique in order to improve the productivity and surface quality in the machining of ceramics. The approach is to locally heat the surface of the workpiece by using a high power laser beam in front of the cutting tool edge so as to soften the material and increase the ductility. It is anticipated that this hybrid technique can allow for machining of the difficult-to-cut materials. Thereby reducing the cost to fabricate ceramic parts and improving dimensional and surface quality. The research seeks to perform experimental investigation by constructing a testbed, to develop models for heat transfer and surface deformation along with crack propagation, and to implement a control scheme based on the process models. In- process sensing techniques pertinent to process control will be developed as well.

高功率激光和显微图像分析系统将 用于对多层陶瓷进行受控实验 热障涂层 这些涂料是为高- 温度应用，如柴油发动机，喷气发动机和 用于陆地和航空航天器的燃气轮机。 目前的研究 通过使涂覆的试样经受低热通量来进行， 导致了一些故障模式的识别。 现在 必须进行类似的标本，以及标本与 薄的多层涂层，以获得大的热通量， 更大的温度和温度梯度。 开裂 在应用高热通量期间发生的过程将 使用显微图像分析进行交互式量化 系统 基本认识是这项研究将 提供将用于开发和设计多层涂层， 在高温下使用寿命更长。 第二个项目是一个多学科的调查， 开发热增强处理技术，以便 提高机械加工的生产率和表面质量 陶瓷. 该方法是局部加热的表面， 工件通过使用高功率激光束在前面的切割 从而软化材料并增加延展性。 预计这种混合技术可以允许 难切削材料的加工。 从而减少 制造陶瓷部件的成本和改善尺寸和 表面质量 这项研究旨在进行实验性的 通过构建试验台进行调查，以开发加热模型 转移和表面变形沿着裂纹扩展，以及 以实现基于过程模型的控制方案。 在- 与过程控制相关的过程传感技术将 也发展了。