Coated Conductor Research
The cost-effective and reliable fabrication of superconducting tapes is a critical challenge in realizing the advantages of high-Tc cuprate applications, such as power transmission, motors and generators, transformers, flywheels, etc. (ORNL Advanced Cables & Conductors). Pulsed Electron Deposition (PED) is a relatively low-price method for depositing complex mixtures of elements in a simple process. Similar to PLD, a pulsed energy source (i.e. a 100 ns electron pulse) results in the ablation of material from a solid “target.” This technique has been used to deposit (at room temperature) fluoride-based precursors that can then be converted (by annealing at elevated temperature) into epitaxial layers of YBa2Cu3O7-x. A reel-to-reel system (see illustration) allows us to deposit onto moving tape. More details are given in publication (Supercond. Sci. Technol., 2005). One of the motivations for this work was our analysis of the cost involved in pulsed laser deposition of YBa2Cu3O7-x (more details of the cost model can be found in the book chapter (2001) or in the updated viewgraphs (2003).