Fundamental Studies on Aluminides

铝化物的基础研究

• 批准号: 0312172
• 负责人: Ramana Reddy
• 金额: --
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0312172&HistoricalAwards=false
• 关键词: Fundamental; Studies; Aluminides

A major objective of the proposed study is to evaluate the role of ternary alloy additions to aluminides in decreasing their brittleness. This study deals with the evaluation of thermodynamic properties of Ti and Nb aluminides, and determination of the stability of various alloy phases in different environmental conditions. This research will enable to evaluate the phase stability of intermetallic aluminides that are candidate materials for many industrial applications. The stability of alloy phases also depends on the environmental conditions. Study of phase stability in the aluminide systems at different temperatures and environmental conditions also falls under the scope of the proposed research. A major goal is to determine the thermodynamic properties of aluminides with/without ternary alloying addition such as Cr, Zr, Mo, and V, using solid-state galvanic cell equilibrium technique. In addition, theoretical models will be developed to predict the stability of alloy phases based on the results of the thermodynamic and mass transport experiments. The reaction products will be analyzed using several techniques such as Optical Microscopy (OM) and Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Electron Microprobe Analysis (EPMA), Transmission Electron Microscopy (TEM) and Micro-hardness Tester. The work is expected to generate a newer understanding of the kinetics and thermodynamics of stable phase formation. The results of these studies are expected to ultimately lead to the development of an innovative cost-effective method of processing aluminides for commerce.%%%The broader impact of the proposed research consists in the development of a laboratory capable of conducting both experimental and theoretical research in the area of advanced materials at the university to enhance the understanding and application of intermetallics in various fields. This research aims at improvement of our understanding of the phase stability in advanced materials and also provides a basis for the development of newer intermetallic aluminides. The present research program would provide a wide variety of expertise in teaching and research, a strong base of external research support and to instill new creative and critical thinking among students. Enrichment of scientific research is possible through the variety of learning perspectives that is available in this environment. The funding of this research provides an opportunity for graduate and undergraduate students including underrepresented minorities to develop understanding and experience in the metallurgical and process areas of research.***

拟议的研究的一个主要目的是评估三元合金添加到铝化物在降低其脆性的作用。本文研究了钛和铌铝化物的热力学性质，并测定了各种合金相在不同环境条件下的稳定性。这项研究将能够评估金属间铝化物的相稳定性，这是许多工业应用的候选材料。合金相的稳定性也取决于环境条件。铝化物体系在不同温度和环境条件下的相稳定性研究也福尔斯拟议研究的范围。一个主要的目标是确定的热力学性质的铝化物与/不三元合金添加，如铬，锆，钼，和V，使用固态原电池平衡技术。此外，理论模型将开发预测的基础上的热力学和质量传输实验的结果的合金相的稳定性。将使用多种技术分析反应产物，如光学显微镜（OM）和扫描电子显微镜（SEM）、X射线衍射（XRD）、电子探针分析（EPMA）、透射电子显微镜（TEM）和显微硬度测试仪。这项工作有望产生一个新的理解的动力学和热力学稳定相形成。这些研究的结果有望最终导致开发出一种创新的、具有成本效益的商业铝化物加工方法。拟议研究的更广泛影响包括建立一个能够在大学先进材料领域进行实验和理论研究的实验室，以提高对金属间化合物在各个领域的理解和应用。这项研究旨在提高我们对先进材料相稳定性的认识，也为新型金属间铝化物的开发提供基础。目前的研究计划将提供广泛的教学和研究方面的专业知识，外部研究支持的坚实基础，并在学生中灌输新的创造性和批判性思维。丰富的科学研究是可能的，通过各种学习的角度，是在这种环境中提供。这项研究的资助为研究生和本科生提供了一个机会，包括代表性不足的少数民族，以发展对冶金和工艺研究领域的理解和经验。