Research Initiation: Superconductive Composite Wire (SCOW)

本项目涉及超导复合线（SCOW）的概念和发展。由于最新一代的高温超导体（Tc 77 K）是陶瓷材料，它们的加工，更重要的是，它们的耐久性，是主要问题。提出将超导陶瓷颗粒掺入坚韧的聚合物基体中制备复合导线。焊丝的微观结构应使颗粒与颗粒之间建立接触；然后电传导将通过渗透机制发生。所需的微观结构将通过使用特殊的加工条件（适当的剪切速率）来发展，这将促进颗粒的聚集，从而产生颗粒到颗粒的接触。尽管可能存在低电流容量的限制，但超导复合线将具有成本效益和高度耐用性和可靠性。

This project deals with the concepts and development of a superconductive composite wire (SCOW). Since the latest generation of the higher temperature (Tc 77 K) superconductors are ceramic materials, their processing and more important, their durability, are major problems. It is proposed that the superconductive ceramic particles be incorporated into a tough polymeric matrix to produce a composite wire. The microstructure of the wire should be such that particle-to-particle contacts are established; the electrical conduction will then take place by percolation mechanisms. The required microstructure will be developed by using special processing conditions (appropriate shear rates) that will promote aggregation of particles to generate particle-to-particle contacts. In spite of a possible limitation of a low current capacity, the superconductive composite wire will be cost-effective and highly durable and reliable.