Innovative Processing to Produce Advanced Intermetallic Materials

人们对高温、轻质 在热力发动机和结构中的强韧材料 应用. 金属间化合物，如铝化钛， 改善高温性能的重要机会 超过目前最先进的镍基超合金， 钛合金 然而，铝化钛基材料具有 显著改善的延展性、强度、氧化和蠕变 抵抗力还没有完全形成。 晶粒细化，微- 铝化钛的宏观合金化和强化 金属间化合物是改善高性能的创新方法。 铝化钛的温度特性。 此程序将 利用射频热等离子体技术合成超细 超纯铝化钛粉末。 生产机制 是在氩气中铝还原四氯化钛高 低温等离子体 钛的微合金化和宏观合金化 铝化物也将在等离子体反应器中进行 同时合成铝化钛粉末。 增强的钛铝复合材料也将在 研究了 一种铝化钛基合金和复合材料， 将导致改进的延展性和高温性能 从这个节目中。

There is an insatiable demand for high temperature, light weight, strong and ductile materials in heat engine and structural applications. Intermetallics such as titanium aluminide offer a significant opportunity for improved high temperature properties over current state-of-the-art nickel base superalloys and titanium alloys. However, titanium aluminide base materials with substantially improved ductility, strength, oxidation and creep resistance have not been fully developed. Grain refining, micro- and macroalloying and reinforcing of titanium aluminide intermetallics are innovative approaches to improve the high temperature properties of titanium aluminide. This program will utilize a rf thermal plasma technique to synthesize ultrafine and ultrapure titanium aluminide powders. The production mechanism is aluminum reduction of titanium tetrachloride in an argon high temperature plasma. Micro- and macroalloying of titanium aluminide will also be carried out in the plasma reactor simultaneously with the synthesis of titanium aluminide powders. Reinforced titanium aluminide composites will also be investigated. A titanium aluminide base alloy and composite with improved ductility and high temperature properties will result from this program.