Energy and the Physical Sciences: Novel multi-seeded bulk superconductors for sustainable engineering applications

能源与物理科学：用于可持续工程应用的新型多晶种体超导体

• 批准号: EP/K02910X/1
• 负责人: David Cardwell
• 金额: $ 60.21万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FK02910X%2F1
• 关键词: Energy; Physical; Sciences; Novel; multi

The ability to generate strong and stable magnetic fields is a critical enabling technology for a broad range of sustainable engineering applications. Almost invariably, more compact field sources and higher magnetic field densities lead directly to more efficient and cost effective devices. One example of this can be found in the widespread applications of small, high power DC electric motors, which have proliferated since the development of the cheap high energy density family of NdFeB materials in the 1980s. Wire-wound superconducting magnets, on the other hand, may offer the potential to generate large magnetic fields, but they are extremely expensive and are difficult to manufacture. A cheaper, simpler and more robust option is the use of magnetised bulk superconductors. The (RE)BCO (where RE = rare earth element such as Y, Nd, Sm, Gd, etc.) family of bulk, melt processed high temperature superconductors (HTS), in particular, is the subject of extensive world-wide developmental research. Bulk HTS materials offer considerable potential to both improve the performance of existing devices that incorporate permanent magnets and to develop new, high field and sustainable energy storage applications, in particular. Indeed, these materials represent a direct link between the physical sciences and the development of sustainable applications in the energy needs sector that will be fundamental to growth of the UK economy in the short to medium term.A number of important scientific and technical challenges to the incorporation of (RE)BCO bulk superconducting materials into practical engineering applications remain. These include improving process efficiency, sample properties, yield, reducing the cost of raw materials, recycling, processing larger samples with conformal geometries, development of a practical magnetisation process and the development of bespoke cryogenic systems for specific applications.The main objective of this proposal is to address and overcome the critical aspects of these challenges to gain a fundamental understanding of the single grain growth process. This will enable the cost-effective processing of (RE)BCO materials with conformal geometries that will be fundamental to their application in a range of sustainable engineering devices within the energy sector and healthcare industry. Specific emphasis of the project will be placed on the development of an effective recycling process to enable a new secondary bulk sample source for low to medium field applications, the development of a novel multi-seeding technique for fabricating large samples of conformal geometry and the development of a novel fabrication process based on a graded composition to produce bulk samples with homogeneous superconducting properties throughout the bulk microstructure.

产生强大而稳定的磁场的能力对于广泛的可持续工程应用是一项关键的使能技术。几乎一成不变的是，更紧凑的场源和更高的磁场密度直接导致更高效和更具成本效益的设备。这方面的一个例子可以在小型、高功率直流电机的广泛应用中找到，自20世纪80年代开发出廉价的高能量密度NdFeB材料家族以来，这种电机激增。另一方面，线绕超导磁体可能提供产生大磁场的潜力，但它们极其昂贵，而且很难制造。一种更便宜、更简单、更坚固的选择是使用磁化的块状超导体。(RE)BCO(其中RE为稀土元素，如Y、ND、Sm、Gd等)尤其是块体、熔融处理的高温超导体(HTS)家族，是世界范围内广泛发展的研究课题。块状高温超导材料在改善现有永磁体器件的性能以及开发新的、高场和可持续的储能应用方面具有相当大的潜力。事实上，这些材料代表了物理科学和能源需求部门可持续应用发展之间的直接联系，这将是英国经济中短期增长的基础。将(RE)BCO块状超导材料纳入实际工程应用仍然存在许多重要的科学和技术挑战。这些措施包括提高工艺效率、样品性能、成品率、降低原材料成本、回收、处理具有共形几何形状的更大样品、开发实用的磁化过程以及为特定应用开发定制的低温系统。该提案的主要目标是解决和克服这些挑战的关键方面，以从根本上了解单晶生长过程。这将使具有共形几何形状的(RE)BCO材料的加工具有成本效益，这将是它们在能源部门和医疗保健行业的一系列可持续工程设备中应用的基础。该项目的重点将放在开发一种有效的回收工艺，以使新的二次块状样品源能够用于低到中等领域的应用，开发一种新的多种子技术来制备具有共形几何形状的大样品，并开发一种基于梯度组成的新的制备工艺来生产在整个块体微结构中具有均匀超导性能的块状样品。

项目成果

Flux jump-assisted pulsed field magnetisation of high-$J_c$ bulk high-temperature superconductors

高$J_c$块状高温超导体的磁通跳跃辅助脉冲场磁化

• DOI: 10.17863/cam.6594
• 发表时间: 2016
• 作者: Ainslie, MD

Buffer Pellets for High-Yield, Top-Seeded Melt Growth of Large Grain Y-Ba-Cu-O Superconductors

• DOI: 10.1021/cg501813y
• 发表时间: 2015-03-01
• 期刊: CRYSTAL GROWTH & DESIGN
• 影响因子: 3.8
• 作者: Kumar, Namburi Devendra;Shi, Yunhua;Cardwell, David A.
• 通讯作者: Cardwell, David A.

Reliable single grain growth of (RE)BCO bulk superconductors with enhanced superconducting properties

• DOI: 10.1088/1361-6668/ab627d
• 发表时间: 2020-01-01
• 期刊: SUPERCONDUCTOR SCIENCE & TECHNOLOGY
• 影响因子: 3.6
• 作者: Cardwell, David A.;Shi, Yunhua;Numburi, Devendra K.
• 通讯作者: Numburi, Devendra K.

Improvements in the processing of large grain, bulk Y-Ba-Cu-O superconductors via the use of additional liquid phase

• DOI: 10.1088/0953-2048/30/1/015017
• 发表时间: 2017-01-01
• 期刊: SUPERCONDUCTOR SCIENCE & TECHNOLOGY
• 影响因子: 3.6
• 作者: Congreve, Jasmin V. J.;Shi, Yunhua;Cardwell, David A.
• 通讯作者: Cardwell, David A.