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罗乐 , 胡素辉
金属学报
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。
关键词: 超导材料 , geometrical configuration , kenetics of diffusion , growth rate , null
LUO Le HU Suhui Shanghai Institute of Metallurgy , Academia Sinica.Shanghai , China [Originally published in ACTA METALL SIN (CHINESE EDN) 24 (5) 1988 pp B340—B347 , received 4 August 1986 , in revised form 1 November 1986]
金属学报(英文版)
Boundary conditions constructed by two typical geometrical configurations related to the manufacturing methods of bronze process and tin-rich Nb tube method have been considered in a diffusion model in which the diffusion of Sn in CuSn matrix plays a major role is as- sumed.The dependence of thickness of Nb_3Sn layer on reaction time has been derived.It is shown that the growth rate of Nb_3Sn relates to the configuration of the superconductor,the geometrical parameters of Nb filaments and CuSn matrix.The theory is qualitatively con- sistent with the experimental results.
关键词: superconducting material Nb_3Sn , null , null , null
