Interfacial Investigations and Process Innovations in the Near Net-Shape Manufacturing of Aluminum/Ceramic Nanocomposites

铝/陶瓷纳米复合材料近净形制造的界面研究和工艺创新

• 批准号: 0099771
• 负责人: Brian Mitchell
• 金额: $ 22万
• 依托单位: Tulane University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0099771&HistoricalAwards=false
• 关键词: Interfacial; Investigations; Process; Innovations; Near

The goal of this research project is to produce a novel class of aluminum matrix nanocomposites with superior structural and corrosion-resistance properties that can be manufactured rapidly and uniformly. The nanocomposites are formed by first producing aluminum and mullite nanoparticles using high-energy ball milling (mechanical attrition). The nanocrystalline powders are then processed to near net-shape composites using Hot Isostatic Pressing (HIP). Further, the incorporation of design innovations to improve the speed and uniformity with which these nanocomposites are formed are being investigated. Specific tasks include the development and evaluation of a fluidized bed process for the continuous milling of nanocrystalline materials. Oxidative milling will be incorporated in the fluidized bed process in order to form intimate mixtures of nanocrystalline aluminum and ceramic, that can then be further processed via HIP. Characterization of the interfacial, mechanical, and corrosion properties of nanocrystalline mullite-reinforced nanocrystalline aluminum matrix composites will be conducted. Mechanical properties are to be characterized using nanoindentation and traditional tensile testing. Corrosion studies will be carried out to determine the effects of nanocrystallinity on chemical resistance. The project will provide research experiences for undergraduates involved in the Louisiana Alliance for Minority Participation (LAMP). It is expected that LAMP students from Dillard, Southern and Xavier will participate and be encouraged to pursue advanced degrees.

该研究项目的目的是生产一种具有优质结构和腐蚀特性的新型铝基质纳米复合材料，可以快速，均匀地制造。纳米复合材料是通过使用高能量球铣削（机械磨损）首先产生铝和mullite纳米颗粒而形成的。 然后，使用热等位压力（HIP）将纳米晶体粉末加工到近乎净形状的复合材料。此外，正在研究成立这些纳米复合材料的速度和均匀性的设计创新。 具体任务包括开发和评估纳米晶材料连续铣削的流化床工艺。 氧化铣削将掺入流化的床过程中，以形成纳米晶铝和陶瓷的亲密混合物，然后可以通过髋关节进一步处理。将进行纳米晶体mullite-mullite-Formenforced纳米晶体铝基质材料的界面，机械和腐蚀特性的表征。使用纳米凹痕和传统的拉伸测试来表征机械性能。 将进行腐蚀研究，以确定纳米晶体对化学耐药性的影响。该项目将为参与路易斯安那州少数群体参与（LAMP）的大学生提供研究经验。预计来自Dillard，Southern和Xavier的灯学生将参加并鼓励攻读高级学位。