THE STUDY OF NANOSTRUCTURAL ELEMENTS OF SUPERCONDUCTIVE CABLE Nb – Ti

G V Shlyakhova,S A Barannikova,L B Zuev

doi:10.17073/0368-0797-2013-10-64-67

Abstract

Microstructural evolution in superconductive cable made of Nb + 47,5 % Ti alloy and drafted to obtain intermediate reduction from 1,3 to 1, 2 mm has been characterized using atomic force, optical and electron microscopies. This alloy is used for making current-carrying elements in the magnetic system of International Thermonuclear Experimental Reactor. The microstructure and phase composition have been examined as well as the effect they have on the properties of superconductive Nb – Ti alloy after cold drawing and intermediate annealing. Strain localization zones in the fractured zones of the cable have been revealed. The changes in chemical composition and shape of Nb – Ti wires in defect-free break zones have been detected. It has been found out that a diffusion Nb barrier is formed in the copper binder surrounding the Nb – Ti wire.

Highlights

Microstructural evolution in superconductive cable made of Nb + 47,5 % Ti alloy and drafted to obtain intermediate reduction from 1,3 to 1, 2 mm has been characterized using atomic force, optical and electron microscopies
This alloy is used for making current-carrying elements in the magnetic system of International Thermonuclear Experimental Reactor
The microstructure and phase composition have been examined as well as the effect they have on the properties of superconductive Nb – Ti alloy after cold drawing and intermediate annealing

Summary

Introduction

Microstructural evolution in superconductive cable made of Nb + 47,5 % Ti alloy and drafted to obtain intermediate reduction from 1,3 to 1, 2 mm has been characterized using atomic force, optical and electron microscopies. The microstructure and phase composition have been examined as well as the effect they have on the properties of superconductive Nb – Ti alloy after cold drawing and intermediate annealing.

Results

Conclusion