An Investigation of Superplasticity in Nitride Ceramics

氮化物陶瓷超塑性的研究

• 批准号: 9314825
• 负责人: Amiya Mukherjee
• 金额: $ 27.35万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-05-01 至 1997-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9314825&HistoricalAwards=false
• 关键词: Investigation; Superplasticity; Nitride; Ceramics

9314825 Mukherjee The purpose of this research is to investigate the phenomenon of superplasticity in an important class of structural ceramics, i.e., nitride ceramics. This is a collaborative investigation leading to a comprehensive framework connecting powder consolidation and formation of micrograined high density nitride ceramics to fabrication processes based on superplasticity. A major theme of the research is the understanding of the mechanisms of superplasticity in submicron non-oxide ceramic materials. Scientific paradigms relevant to superplastic response in non-oxide ceramics are developed by focusing the research on pure and doped aluminum nitride (AIN) and silicon nitride (SiN) and without fluxing additives. Both of these important nitride ceramics will be consolidated by a Plasma Activated Sintering (PAS) process very recently pioneered in Japan and demonstrated to achieve high densities in very short sintering times. %%% In this increasingly energy-conscious industrial age, ceramics are in the forefront as materials destined for use as high temperature structural materials. They have the potential for finding their place in gas turbine engines in propulsion systems and also in terrestrial power plants. Superplasticity brings the additional attractive feature of being a near net-shape forming process, with significant saving in materials and machining costs.

9314825 Mukherjee本研究的目的是研究一类重要的结构陶瓷中的超塑性现象，即，氮化物陶瓷 这是一个合作的调查，导致一个全面的框架连接粉末固结和形成的微晶高密度氮化物陶瓷的制造工艺的基础上超塑性。 研究的一个主要主题是了解亚微米非氧化物陶瓷材料的超塑性机制。 非氧化物陶瓷超塑性响应的研究主要集中在纯的和掺杂的氮化铝（AlN）和氮化硅（SiN）和无助熔剂添加剂的研究。这两种重要的氮化物陶瓷都将通过等离子体活化烧结（PAS）工艺进行固结，该工艺最近在日本首创，并已证明可在非常短的烧结时间内实现高密度。 %在这个能源意识日益增强的工业时代，陶瓷是作为高温结构材料使用的最前沿材料。 它们有可能在推进系统的燃气涡轮机发动机和地面发电厂中找到自己的位置。 超塑性带来了近净成形工艺的额外吸引人的特征，可以显着节省材料和加工成本。