Fundamental Studies on Phase Stability in Intermetallic Aluminides

小行星9314016 本研究的目的是根据热力学、质量传递和高温环境性质，确定金属间铝化物中相稳定性的基础数据。 要研究的合金系统是钛-铝和铌-铝合金系统中有和没有三元添加剂的铝化物。 在600至1000摄氏度的范围内采用固态原电池测量来确定活性、活性系数和生成吉布斯自由能。 三元添加物在5至25原子百分比的范围内并且包括钼、铪和钒。 这项研究为这些潜在有用的合金开发了所需的热力学数据。 %铝化物系统是根据其独特的结构特性和实际意义选择的。 这些高温金属间合金在航空航天和汽车工业中具有巨大的应用潜力。 ***

9314016 Reddy The research objective is to determine fundamental data on phase stability in intermetallic aluminides, based on thermodynamic, mass transport, and high temperature environmental properties. Alloy systems to be studied are aluminides in the titanium-aluminum and niobium -aluminum alloy systems with and without ternary additions. Solid-state galvanic cell measurements are employed in the range of 600 to 1000 degrees Celsius to determine the activity, activity coefficient, and Gibbs free energy of formation. The ternary additions are in the range of 5 to 25 atom percent and include molybdenum, hafnium, and vanadium. This research develops needed thermodynamic data for these potentially useful alloys. %%% The aluminide systems are selected based on their unique structural properties and practical significance. These high temperature intermetallic alloys have significant potential for use in the aerospace and automobile industries. ***