CAREER: Scaled-Up Manufacturing of Nanostructured Refractory Ceramics for High-Temperature Applications

职业：高温应用纳米结构耐火陶瓷的规模化制造

• 批准号: 0645225
• 负责人: Olivia Graeve
• 金额: $ 40万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-05-15 至 2009-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0645225&HistoricalAwards=false
• 关键词: CAREER; Scaled; Up; Manufacturing; Nanostructured

The goal of this career development grant is to establish a comprehensive research and education program focusing on the processing and mechanical properties of nanostructured refractory ceramics in order to extend the basic and practical knowledge of sintering as well as mechanical behavior in these types of materials, while at the same time producing materials that have a direct application in ultra-high temperature environments. Graduate students, undergraduate students, high school teachers, and high school students will be incorporated into research and educational experiences possible with a project such as this one. Building on the principal investigator's strengths in the synthesis and characterization of ceramic materials, the specific objectives of the project are: (1) to synthesize nanostructured carbide powders using a solvothermal synthesis approach; (2) to characterize the process of solvothermal synthesis over a range of experimental conditions (i.e., reaction time, reaction temperature, and cleaning solvents) in order to optimize and scale-up the process; (3) to densify the nanostructured powders into compacts via spark-plasma sintering; (4) to characterize the process of densification over a range of experimental conditions (i.e., starting crystallite size of the powders, starting agglomerate size of the powders, pressure, temperature, heating rate, and time of densification); (5) to examine the microstructural development during the densification process; (6) to characterize the mechanical behavior of the densified compacts at room and high temperatures and to determine the changes in mechanical behavior with changes in SPS processing conditions; (7) to characterize the thermal shock resistance of the compacts, since in their ultimate expected application the materials will be undergoing cycles of very rapid heating and cooling; and (8) to enlist graduate students, undergraduate students, high school teachers, and high school students in the process of meeting the above research objectives.Complementary to the research goals described above, a multi-objective education plan is proposed. The plan contains the following four objectives: (1) to involve graduate and undergraduate students from the USA and Mexico's National Polytechnic Instittue in research experiences and collaborative activities; (2) to involve undergraduate students of Hispanic descent from Southwester College in research experiences and collaborative activities; (3) to continue outreach activities to northern Nevada high school students, and (4) to involve Hispanic high school students and teachers from Hug High School (Reno) in summer research experiences.

这项职业发展基金的目标是建立一个全面的研究和教育计划，专注于纳米结构耐火陶瓷的加工和机械性能，以扩展关于烧结以及这些类型材料的机械行为的基本和实用知识，同时生产可在超高温环境中直接应用的材料。研究生、本科生、高中教师和高中生将被纳入像这样的项目可能的研究和教育经验中。基于主要研究人员在陶瓷材料合成和表征方面的优势，该项目的具体目标是：(1)利用溶剂热合成方法合成纳米碳化物粉末；(2)在一系列实验条件(即反应时间、反应温度和清洗剂)下表征溶剂热合成过程，以优化和放大该过程；(3)通过放电等离子烧结将纳米结构粉末致密化成致密体；(4)在一系列实验条件下(即，粉末的起始微晶尺寸、粉末的起始团聚尺寸、压力、温度、升温速度和致密时间)表征致密化过程；(5)检查致密化过程中的微观结构发展；(6)表征致密化压坯在室温和高温下的力学行为，并确定力学行为随着SPS加工条件的变化而变化；(7)表征压坯的抗热震性能，因为在其最终预期的应用中，材料将经历非常快速的加热和冷却循环；(8)在满足上述研究目标的过程中招收研究生、本科生、高中教师和高中生。根据上述研究目标，提出了多目标教育计划。该计划包括以下四个目标：(1)让美国和墨西哥国家理工学院的研究生和本科生参与研究经验和合作活动；(2)让西南学院的西语裔本科生参与研究经验和合作活动；(3)继续向内华达州北部的高中生推广活动；(4)让胡格高中(RENO)的西语裔高中生和教师参与暑期研究经验。