单晶连铸铝线材的导电性能

来源期刊：中国有色金属学报1999年第1期

论文作者：范新会 李建国 傅恒志

文章页码：87 - 90

关键词：金属单晶，连续铸造，工业纯铝，电阻率，晶界

Key words：single crystal, continuous casting, aluminum, electric resistance, grain boundary

摘    要：测试了单晶连铸铝线材的室温导电性能， 单晶连铸工业纯铝的电阻率平均为2.6455×10^-8Ωm， 比金属型多晶试样表面细晶区降低11.5%， 比中心粗晶区降低8.1%。 晶界的有无对电阻率的影响很大， 而晶界的多少对电阻率的影响较小。 晶界对电阻率的影响， 归因于晶界上大量存在的空位、 位错及杂质对电子散射的综合效应。

Abstract: The electrical properties of single crystal aluminum wire made by the technique of continuous casting of single crystal (CCSC) metals were measured and analyzed. The results indicated that the effect of with or without grain boundary is significant to specific resistance, but the effect of quantity of grain boundaries is much smaller. The specific resistance of CCSC single crystal aluminum is 2.6455×10^-8Ω·m, which is 11.5% lower than that of fine crystal sample cut out near the surface of die casting rod, and 8.1% lower than that of the coarse crystal sample cut out at the central of die casting rod. The influence of grain boundary to specific resistance is the combination emission effects of dislocations, lattice vacant sites and impurities, which are largely gathered at grain boundary.