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.

本研究项目的目标是生产一种新型的铝基纳米复合材料，具有上级结构和耐腐蚀性能，可以快速均匀地制造。纳米复合材料通过首先使用高能球磨（机械研磨）产生铝和莫来石纳米颗粒来形成。 然后使用热等静压（HIP）将纳米晶粉末加工成近净形复合材料。此外，正在研究设计创新的结合，以提高这些纳米复合材料形成的速度和均匀性。 具体任务包括开发和评估用于纳米晶材料连续研磨的流化床工艺。 氧化研磨将被纳入流化床工艺，以形成纳米晶铝和陶瓷的紧密混合物，然后可以通过HIP进一步处理。纳米晶莫来石增强纳米晶铝基复合材料的界面，机械和腐蚀性能的表征将进行。机械性能的特点是使用纳米压痕和传统的拉伸试验。 将进行腐蚀研究，以确定纳米结晶度对耐化学性的影响。该项目将为参与路易斯安那州少数族裔参与联盟（LAMP）的本科生提供研究经验。预计来自迪拉德，南方和泽维尔的LAMP学生将参与并被鼓励攻读高级学位。