【摘要】 使用电测量方法测量了用粉末套管 (PIT)工艺制备的Cu Ni包套MgB2 单芯带的弹性模量E ,其值与Cu及其合金的弹性模量为同一量级 ,还证实了在带中存在着压缩预应力 .我们研究了该带在 4 .2K ,0 .5～ 4T磁场下弯曲成不同曲率时的Ic B特性曲线 ,并且计算相应曲率时的最大应变和应力 .弯曲实验显示该带材对应力较为敏感 ,必须改进工艺并实施机械强化 .更多还原

【Abstract】 The elastic modulus measurements of Cu-Ni sheathed MgB₂ monofilament tape fabricated by “power in tube” method have been performed using electric technique. The magnetic field dependence of I_c has been investigated on the sample subjected to various strain levels through bending of the tape with different radius. We found that our MgB₂ sample is sensitive to applied strains,mechanical reinforced MgB₂ tape is essential to practical application. The bend strain and stress have been calculated based on a formula derived from the definition.更多还原