NSF-Europe: Solidification Processing and Properties of Advanced Single Crystal Superalloys

这个NSF-欧洲奖给佛罗里达大学是开发和表征大型高温合金单晶的基础上镍。 通过与帝国理工学院（英国）和工业界[西门子西屋电力公司（佛罗里达州奥兰多）;太阳能涡轮机（加利福尼亚州圣地亚哥）;普拉特惠特尼（东哈特福德）]的合作研究，PI将确定合金化添加的难熔元素（如钨、铌和钌）对加工和性能的影响的机制。 此外，晶界改性剂如硼和铪以及钴将被合金化以增加微观结构稳定性。将开发加工方法，以生产大型单晶高温合金，用于涡轮机叶片的潜在应用，这将对发电系统具有技术和科学意义。 未来的发电系统将需要无缺陷的大型单晶铸件，并且能够在比当前合金更高的温度下运行更长的时间。有了这个奖项，加强教育和研究经验将提供给高中，本科和研究生。 在佛罗里达大学运作的现有和有效的计划将被用来招募和培养包括少数民族学生和妇女在内的多元化学生团体，该奖项支持的这些学生的活动将对材料科学和其他相关学科产生重大的积极影响。 让这些学生在很小的时候就参与科学和技术，并教育他们将来在重要的技术部门就业，将是该奖项的预期成果。

This NSF-Europe award to University of Florida is to develop and characterize large superalloy single crystals based on nickel. With this collaborative research with Imperial College (UK) and industry [Siemens Westinghouse Power Corp. (Orlando FL); Solar Turbines (San Diego, CA); Pratt Whitney (East Hartford)], the PIs will identify mechanisms that underlie the effect of alloying additions of refractory elements such as tungsten, rhenium and ruthenium for processing and properties. In addition, grain boundary modifiers such as Boron and Hafnium, and Cobalt will be alloyed to increase microstructural stability. Processing methods will be developed to produce large single crystal superalloys for potential applications in turbine blades, which would have technological and scientific relevance for power generation systems. Future power generation systems will require large single crystal castings that are defect free and capable of operating at higher temperatures for longer periods of time than current alloys. With this award, enhanced educational and research experience would be available to high school, undergraduate and graduate students. Existing and effective programs operating at University of Florida will be utilized to recruit and train a diverse student body including minority students and women, and activities of these students supported by this award would have a significant positive impact on the materials science and other related disciplines. Getting these students involved at an early age in science and technology, and educating them for future employment in important technological sectors would be an expected outcome of this award.