GOALI: Epitaxial Growth of Superconducting Thin Film Tapes with Prefabricated Nanostructures

GOALI：具有预制纳米结构的超导薄膜带的外延生长

• 批准号: 1000162
• 负责人: Venkat Selvamanickam
• 金额: $ 34.97万
• 依托单位: University of Houston
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-06-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1000162&HistoricalAwards=false
• 关键词: GOALI; Epitaxial; Growth; Superconducting; Thin

This Grant Opportunity for Academic Liaison with Industry (GOALI) award provides funding for the development of a novel approach to grow superconducting thin films on metal substrates with prefabricated nanorods. The approach consists of prefabricated nanorod growth on single-crystalline-like buffer film on flexible metal tape followed by epitaxial superconductor film growth by Metal Organic Chemical Vapor Deposition (MOCVD) on the buffer film. Three approaches will be investigated in this program to prefabricate nanostructures on single-crystalline-like buffer templates. The key factors that affect density, dimensions, morphology and orientation of nanorods on the buffer templates will be determined so that the nanorods can be controlled in a predictable manner. The science of epitaxial growth of the superconducting film on an underlying substrate through a maze of nanorods will be studied. The pinning effectiveness of these superconducting films will be evaluated to determine and control the impact of prefabricated nanorod defect structure. A successful outcome of this program will enable superconducting thin film tapes with significantly improved critical current in high magnetic fields compared to the state-of-the art. Additionally, by separation of nanodefect growth from the epitaxial superconductor growth process, it is expected that growth rate limitation problems that exist in today's technology can be resolved. The expected significance of the program is the creation of a transformative processing science leading to robust manufacturing of superconducting tapes by industry, which in turn would yield a commercial product with much better performance, uniformity and consistency. A successful outcome of this program can result in a broad and positive impact in the field of superconductors which provide solutions to a wide spectrum of problems in energy as well in medicine, transportation, particle physics and chemical research. Furthermore, the program can broadly enable a stronger understanding of nanostructures in thin film materials as well MOCVD process science.

这个学术与工业联络奖（GOALI）奖为开发一种新方法提供资金，该方法在金属基底上用预制纳米棒生长超导薄膜。该方法包括在柔性金属带上的单晶状缓冲膜上预制纳米棒生长，然后通过金属有机化学气相沉积（MOCVD）在缓冲膜上外延超导膜生长。本计画将探讨三种在类单晶缓冲模板上预制奈米结构的方法。影响缓冲模板上纳米棒的密度、尺寸、形态和取向的关键因素将被确定，从而可以以可预测的方式控制纳米棒。将研究通过纳米棒迷宫在底层衬底上外延生长超导薄膜的科学。这些超导薄膜的钉扎效率将被评估，以确定和控制预制纳米棒缺陷结构的影响。该计划的成功结果将使超导薄膜带材在高磁场中的临界电流与现有技术相比得到显着改善。此外，通过将纳米缺陷生长与外延超导体生长过程分离，预计可以解决当今技术中存在的生长速率限制问题。该计划的预期意义是创造一种变革性的加工科学，从而使超导带材的制造业更加强大，从而产生具有更好性能，均匀性和一致性的商业产品。该计划的成功结果可以在超导体领域产生广泛而积极的影响，为能源以及医学，运输，粒子物理和化学研究中的广泛问题提供解决方案。此外，该计划可以广泛地使薄膜材料中的纳米结构以及MOCVD工艺科学得到更好的理解。