CAREER: Reaction-Based Processing of High Temperature Materials

职业：高温材料的反应加工

• 批准号: 0346800
• 负责人: William Fahrenholtz
• 金额: $ 40万
• 依托单位: Missouri University of Science and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-01 至 2009-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0346800&HistoricalAwards=false
• 关键词: CAREER; Reaction; Based; Processing; Temperature

The research and educational objectives of this CAREER project focus on the reaction-based processing of multi-phase materials designed for use at elevated temperatures. Four different research projects have been outlined to investigate different aspect of reaction-based processing: 1) use of in situ reactions to tailor the interfacial chemistry in ceramic-metal systems; 2) determination of reaction mechanisms in ceramic-metal systems; 3) calculation and experimental verification of phase equilibrium diagrams in ultra-high temperature ceramic systems; and 4) development of new routes for the processing of Zr-based ceramics. Taken together, these projects will provide new processing routes, better control of microstructure, improved knowledge of reaction mechanisms, and a fundamental understanding of phase stability in high temperature materials. The results will benefit government and industry development of new aerospace vehicles and other systems that operate in extreme environments. High temperature materials will also serve as the focus for educational activities that include the direct training of four graduate students and up to ten undergraduates as well as professional development activities for all Ceramic Engineering undergraduates at University of Missouri-Rolla.The efficiency of systems that convert heat into useful work (e.g., electrical power plants, internal combustion engines) can be increased by increasing the operating temperatures. The materials used to construct these systems limit the maximum operating temperature. When used at elevated temperatures, materials must be stable against reaction with other materials and must be resistant to internal physical changes that can alter performance over time. This project will address the critical need for improved high temperature materials by increasing the fundamental understanding of processing-microstructure-property relations in high temperature systems. The project will also facilitate the training of undergraduate and graduate students for potential careers in this field.

这个CAREER项目的研究和教育目标集中在高温多相材料的反应处理上。概述了四个不同的研究项目，以研究基于反应的加工的不同方面：1)使用原位反应来定制陶瓷-金属体系中的界面化学；2)测定陶瓷-金属体系的反应机理；3)超高温陶瓷体系相平衡图的计算与实验验证；4)开发锆基陶瓷加工新路线。总之，这些项目将提供新的加工路线，更好地控制微观结构，提高对反应机理的认识，并对高温材料的相稳定性有一个基本的了解。研究结果将有利于政府和工业开发在极端环境下运行的新型航空航天飞行器和其他系统。高温材料也将成为教育活动的重点，包括直接培训四名研究生和多达十名本科生，以及为密苏里大学罗拉分校所有陶瓷工程本科生提供专业发展活动。将热量转化为有用功的系统（如发电厂、内燃机）的效率可以通过提高工作温度来提高。用于构建这些系统的材料限制了最高工作温度。当在高温下使用时，材料必须稳定，不与其他材料发生反应，并且必须能够抵抗随着时间的推移而改变性能的内部物理变化。该项目将通过增加对高温系统中加工-微观结构-性能关系的基本理解来解决对改进高温材料的关键需求。该项目还将促进本科生和研究生在这一领域的潜在职业培训。