Near-net Shape Processing of Functionally Graded Structural Material

功能梯度结构材料的近净形加工

• 批准号: 0854208
• 负责人: Olusegun Ilegbusi
• 金额: $ 26.08万
• 依托单位: The University of Central Florida Board of Trustees
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0854208&HistoricalAwards=false
• 关键词: Near; net; Shape; Processing; Functionally

The objective of this research is to optimize through mathematical and physical modeling, a method for near-net shape production of porous structural materials with accurately controlled properties. The method, pressure-assisted combustion synthesis (PACS), combines conventional self-propagating high-temperature synthesis and foaming in one operation. The research approach has theoretical and experimental components. A multi-scale mathematical model of the process is developed to quantify the microstructure-property relationship and establish the parameter space for production of the desired microstructure. PACS is then used to synthesize porous intermetallic material, utilizing the processing conditions obtained from the mathematical model. The materials produced are subjected to microscopy and mechanical testing, and the results are used to validate the mathematical model, identify deficiencies and optimize the process. Deliverables include modeling and analysis tools across dimensional scales, student education, and documentation of research results in reports, journals, and theses. This research, if successful, will provide a cost-effective, energy efficient and environmentally benign method for producing porous structural materials with desired microstructure and mechanical properties. Example application includes optimization of the production of net-shape biomedical structural implants to improve the outcomes of prostheses procedures, reduce costs, reduce failure rates, and enhance the quality of life of patients with prostheses. The methodology is also applicable to a wider class of complex materials processes involving non-linear coupled transport-reaction phenomena with moving interfaces. Many such processes are relevant to critical defense and commercial needs for materials such as near-net shape monolithic ceramics or ceramic composites for the High Speed Civil Transport combustors. Undergraduate and graduate students will be engaged in the research, and will benefit from classroom instruction and the multidisciplinary training in diverse fields of materials processing, reactive engineering, thermal science and numerical methods.

本研究的目的是通过数学和物理建模来优化一种具有精确控制性能的多孔结构材料的近净形状生产方法。该方法，压力辅助燃烧合成（PACS），结合了传统的自传播高温合成和发泡在一个操作。研究方法有理论和实验两部分。建立了该工艺的多尺度数学模型，以量化微结构-性能关系，并建立了生产所需微结构的参数空间。然后利用从数学模型中得到的加工条件，利用PACS合成多孔金属间材料。生产的材料经过显微镜和力学测试，结果用于验证数学模型，识别缺陷并优化工艺。可交付成果包括跨维度尺度的建模和分析工具，学生教育，以及报告，期刊和论文中的研究成果文档。这项研究如果成功，将为生产具有理想微观结构和机械性能的多孔结构材料提供一种经济、节能和环保的方法。应用实例包括优化网状生物医学结构植入物的生产，以改善假体手术的效果，降低成本，减少失败率，提高假体患者的生活质量。该方法也适用于涉及具有移动界面的非线性耦合输运-反应现象的更广泛的复杂材料过程。许多此类工艺都与关键的国防和商业需求有关，例如用于高速民用运输燃烧器的近净形状单片陶瓷或陶瓷复合材料。本科生和研究生将参与研究，并将受益于课堂教学和材料加工、反应工程、热科学和数值方法等不同领域的多学科训练。