Title: Production Scale-up and performance enhancement issues at SuNAM

Nov. 29 18:15-18:40

*Seung-Hyun Moon1
SuNAM Co., Ltd.1

After establishing mass production facilities of Coated Conductors(CC) based on a proprietary evaporation process, SuNAM has been supplying hundreds of kilometers of CC for various applications, including grid use in the domestic market. To keep up with increasing demand from Korean cable installations and high field magnet and fusion applications, we installed the 2nd RCE(Reactive Co-Evaporation) equipment for superconducting layer, about which we reported at the previous ISS, emphasizing critical current enhancements at medium temperature(20~40 K) and mid-field range(<5 T). We tried to include BMO3(M = Zr, Hf, …) in a more uniform manner, and gained understanding of the relation between property and micro-structure through microstructural analysis. Rare earths other than Gd, especially Y, are tried and processes are optimized for each REs and mixtures thereof. In our new RCE system, along with buffer and protection layer processing more emphasis is given to uniformity, in terms of critical current and physical dimension, than pursuit of highest performance, realizing the needs of customers. Other scale-up issues are also discussed. Part of this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2022M3I9A1076681).