Microstructures and Defect Structures of High-Temperature Corrosion Scales

高温腐蚀鳞片的显微组织和缺陷结构

• 批准号: 8713689
• 负责人: Linn Hobbs
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1991-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8713689&HistoricalAwards=false
• 关键词: Microstructures; Defect; Structures; Temperature; Corrosion

The objective of the research is the detailed understanding of corrosion processes in refractory metals, light alloys and high temperature alloys. Three particular materials are proposed for investigation, typical of these three important classes of materials. The approach taken is that of detailed microstructural analysis of the chemistry and microstructure of the corrosion products, and of the near surface region of the material, using sophisticated methods of TEM (transmission electron microscopy) and AEM (analytical electron microscopy), combined with methods which permit precise tracking of the rates of corrosion in the metals. Both the research and the development of analytical tools required for the research will be of significant benefit to both science and technology, since corrosion of these materials is typically one of the limiting factors in their lifetime in service, and in their range of application. Corrosion processes tend to be complicated and path-dependent, and post-hoc analysis typically gives little information about the details of the corrosion process. The work would conversely make a significant contribution to understanding the details of the corrosion process, and thereby lead to improved materials.

研究的目的是详细了解 耐高温金属、轻合金和 高温合金 提出了三种特殊材料 对于调查，典型的这三个重要类别的 材料. 所采取的方法是， 化学和微观结构的微观结构分析 腐蚀产物，和近表面区域的 材料，使用复杂的TEM方法（透射 电子显微术）和AEM（分析电子显微术）， 与允许精确跟踪费率的方法相结合 金属的腐蚀。 分析工具的研究和开发 研究所需的资金将对双方都有重大好处。 科学和技术，因为这些材料的腐蚀是 这通常是它们寿命中的限制因素之一， 服务，并在其应用范围内。 腐蚀过程 往往是复杂的和路径依赖的，事后分析 通常很少提供有关 腐蚀过程 相反，这项工作将使一个重要的 有助于了解腐蚀的细节 工艺，从而导致改进的材料。