원문정보
초록
영어
Effects of electron beam (EB) irradiation on the mechanical strength of Cu (conducting sheath) and Nb (diffusion barrier) of Cu/Nb/MgB2 superconducting was investigated. Wire- and tape-type Cu/Nb/MgB2 samples were irradiated at E-beam energy of 2.5 MeV and 5 mA and a maximum E-beam dose was 5x1017 e/m2. The hardness value of Cu and Nb region was measured by the Vickers micro-hardness method. In the case of the wire sample, the hardness of Cu and Nb increased proportionally as the dose was increased up to 5x1017 e/m2, whereas in the case of the tape sample, the hardness increased up to a dose of 0.5x1017 e/m2, and decreased slightly 5x1017 e/m2. The hardness increase of Cu and Nb is believed to be due to the decrease of the deformability of Cu and Nb due to the defects formed inside the materials by E-beam irradiation.
목차
1. INTRODUCTION
2. EXPERIMENTS
2.1. Preparation of MgB2 wire and tape.
2.2. E-beam irradiation experiment.
2.3. Vickers micro-hardness test.
3. RESULTS AND DISCUSSION
4. CONCLUSIONS
REFERENCES