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一、引言1969年,Kaufman 和 Suenasa 将铌埋入锡青铜中,经固态扩散热处理(以下简称热处理)后,在青铜与铌的交接面上获得纯 Nb_3Sn。从此以后,青铜法制作的多芯Nb_3Sn 导体,作为高场(>10万高斯)磁体使用超导材料,受到了人们的极大重视。近几年来,对它的研究已达到相当的深度与广度。热处理对青铜法制作多芯 Nb_3Sn 导体的影响至关重要,它既与 Nb_3Sn 层的生长有
I. INTRODUCTION In 1969, Kaufman and Suenasa buried niobium in tin bronze. After solid state diffusion heat treatment (hereinafter referred to as heat treatment), pure Nb 3 Sn was obtained at the interface between bronze and niobium. Since then, the multi-core Nb_3Sn conductor made by the bronze method has received great attention as a superconducting material for high field (> 100,000 Gauss) magnets. In recent years, its research has reached a considerable depth and breadth. The influence of heat treatment on the production of multi-core Nb_3Sn conductor by the bronze method is very important. It is not only related to the growth of Nb_3Sn layer