LEAPS-MPS: Exploring Centrifugal Jet Spinning of Ultra-High-Temperature Ceramic Nanofibers

LEAPS-MPS：探索超高温陶瓷纳米纤维的离心喷射纺丝

• 批准号: 2137923
• 负责人: Rogelio Benitez
• 金额: $ 24.99万
• 依托单位: The University of Texas Rio Grande Valley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2137923&HistoricalAwards=false
• 关键词: LEAPS; MPS; Exploring; Centrifugal; Jet; LEAPS; MPS; Exploring; Centrifugal; Jet

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2).NON-TECHNICAL DESCRIPTION: This research project consists of a novel method to fabricate micro- and nano-sized ceramic fibers that can withstand several thousand degrees Celsius without melting. A metal salt and a polymer are dissolved to make a viscous solution that is subsequently spun into fibers. The fibers are then heat treated to react the metal with the carbon in the polymer and form the ultra-high-temperature ceramic fiber. The effects of high temperatures and oxygen in the atmosphere on the fibers’ microstructure are also studied. This research makes it possible to fabricate, in large quantities and at low temperature, ceramic nanofiber mats of compounds not available in fiber form. These ultra-high temperature ceramic fiber mats can contribute to thermal protection systems that allow aircraft, missiles, and rockets to travel faster and for a longer period at hypersonic speed. Two undergraduate students and two graduate students from a minority-serving institution are obtaining laboratory experience in ceramic manufacturing and testing. Another 8 to 16 undergraduate students are engaged in designing, fabricating, and testing equipment for ceramic materials characterization. Graduates typically find employment in the high-tech industry or further pursue graduate degrees.TECHNICAL DETAILS: Several synthesis methods exist for the fabrication of transition metal carbide nanocrystalline nanoparticles, nanorods, nano-powders, and nanowires; however, it is still a great challenge to fabricate long and continuous ultra-high-temperature transition metal carbide nanofibers using scalable techniques for mass production. In this project, novel transition-metal carbide nanofibers are fabricated by the carbothermal reduction of polymer precursor nanofibers manufactured by centrifugal jet spinning. Centrifugal jet spinning uses centrifugal forces to produce fibers from solutions at speeds and costs similar to melt-blown and glass fiber methods and is used in this project to leverage the energy-efficient polymer precursor synthesis method with the added benefit of being easily scalable for mass production. The oxidation behavior of the fibers is also investigated. The knowledge obtained from this project can be useful to fabricate other ceramic fibers in large quantities. In addition, this research provides opportunities for undergraduate and graduate students of underrepresented groups to obtain hands-on experience in materials science and engineering.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项是根据2021年《美国救援计划法》的全部或部分资助的（公共法117-2）。非技术描述：该研究项目包括一种新型方法，用于制造微型和纳米尺寸的陶瓷纤维，这些陶瓷纤维可以承受几千摄氏度，而无需融化。将金属盐和聚合物溶解以制成随后旋转成纤维的粘液溶液。然后对纤维进行热处理，以与聚合物中的碳反应金属，并形成超高的陶瓷纤维。高温和氧气在大气中对纤维微结构的影响也是研究的。这项研究使得在低温下以纤维形式不可用的化合物的陶瓷纳米纤维垫形成可能。这些超高的温度陶瓷纤维垫可以有助于允许飞机，导弹和火箭的热保护系统更快地行驶，并且以超音速速度更长。两名本科生和两名来自少数派服务机构的研究生正在获得陶瓷制造和测试的实验室经验。另外8至16名本科生从事陶瓷材料表征的设计，制造和测试设备。毕业生通常在高科技行业或进一步购买研究生学位上找到就业。技术细节：用于制造过渡金属碳化物纳米晶体纳米纳米粒子，纳米棒，纳米蛋黄和纳米线的几种合成方法；但是，使用可扩展的质量生产技术来制造长而连续的超高型金属碳化物纳米纤维仍然是一个巨大的挑战。在这个项目中，新颖的过渡金属碳化物纳米纤维是通过离心喷射旋转生产的聚合物前体纳米纤维的碳纤维减少来制造的。离心喷射旋转使用离心力以速度和类似于熔体和玻璃纤维方法的成本从溶液中产生纤维，并在该项目中用于利用能源效率的聚合物前体合成方法，其附加益处是易于扩展用于质量产量。还研究了纤维的氧化行为。从该项目中获得的知识对于大量制造其他陶瓷纤维很有用。此外，这项研究为代表性不足的团体的本科生和研究生提供了机会，以获得材料科学和工程方面的动手经验。该奖项反映了NSF的法定任务，并通过使用该基金会的知识分子的优点和更广泛的影响来评估NSF的法定任务，并被认为是宝贵的支持。