Enhanced-Textured-Powder Bi-2212/Ag Wire Development

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Kellams, J.N.^1 ; McIntyre, P.^1 ; O'Quinn, K.^1

Texas A and M University, College Station

TX, United States^1

关键词: Bi-2212;    Bi-2212/Ag;    Fine powders;    Microstructure measurements;    Multifilament wires;    Process development;    Square cross section;    Transport currents;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012183/pdf
DOI  :  10.1088/1757-899X/502/1/012183

来源: IOP

【 摘 要 】

A new method for preparing Bi-2212/Ag multifilament wire is being developed. Bi-2212 fine powder is homogenously mixed with nanoparticle Ag and uniaxially compressed into square-cross-section rods. The rods are assembled into a silver matrix and drawn into monofilament wire, restacked, and drawn into multifilament wire. Heat treatment studies have been conducted to optimize parameters for a non-melt heat treatment. Transport current at 77 K and microstructure measurements have been made to guide the process development.