采用体扩散模型,假定Sn在CuSn母体中的扩散是Nb_3Sn层生长的控制因素,考虑了青铜法和Nb管富Sn法这两种典型的成材方法的几何构形所形成的边界条件,在一级近似下解出了Nb_3Sn层厚度和热处理时间的依赖关系。结果表明:Nb_3Sn层生长速率与超导材料的复合构形、Nb纤维以及CuSn母体的几何参数有内在联系。理论与实验结果定性相符。
Boundary conditions constructed by two typical geometrical config-urations related to the manufacturing methods of bronze process and tin-rich Nbtube method have been considered in a diffusion model in which the diffusion ofSn in CuSn matrix plays a major role is assumed. The dependence of thickness ofNb_3Sn layer on reaction time has been derived. It is shown that the growth rate ofNb_3Sn relates to the configuration of the superconductor, the geometrical parametersof Nb filaments and CuSn matrix. The theory are qualitatively consistent with theexperimental results.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%