CCE法とRHQT法によるNb_3Al線材の作製とその超伝導特性評価

概要

論文の詳細を見る
A fabrication process for Nb3Al intermetallic compound wire and measurements of their superconducting properties are presented. The adopted process consists of the CCE method and the RHQT treatment. The former (CCE) is the processing of Nb/Al composite wire and is characterized by extrusion of thin chips of Nb/Al clad-sheet in which the thickness ratio of the Nb-layer to the Al-layer corresponds to Nb3Al. The latter (RHQT) is the heat-treatment method to transform the Nb/Al composite wire into the Nb3Al intermetallic compound, which gives a nearly stoichiometric composition and a fine grain of Nb3Al for high performance of superconductivity. The Nb3Al wire is successfully fabricated by the combination of the CCE method and the RHQT treatment. Their superconducting properties are evaluated to be 18.02 K of Tc and 318 A/mm2 of Jc at 20 T and 4.2 K. Hc2 is estimated to be 26.3 T by a Kramer plot.
足利工業大学の論文
2001-11-07