(西安工業(yè)學(xué)院材料工程系， 西安 710032西北工業(yè)大學(xué)凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室， 西安 710072
)
摘 要: 測(cè)試了單晶連鑄鋁線材的室溫導(dǎo)電性能， 單晶連鑄工業(yè)純鋁的電阻率平均為2.6455×10-8Ωm， 比金屬型多晶試樣表面細(xì)晶區(qū)降低11.5%， 比中心粗晶區(qū)降低8.1%。 晶界的有無對(duì)電阻率的影響很大， 而晶界的多少對(duì)電阻率的影響較小。 晶界對(duì)電阻率的影響， 歸因于晶界上大量存在的空位、 位錯(cuò)及雜質(zhì)對(duì)電子散射的綜合效應(yīng)。
關(guān)鍵字: 金屬單晶 連續(xù)鑄造 工業(yè)純鋁 電阻率 晶界
（Department of Material Engineering,Xi'an Institute of Technology, Xi'an 710032, P. R. China
Li Jianguo and Fu Hengzhi
State Key Laboratory of Solidification Processing,
Northwestern Polytechnical University, Xi'an 710072, P. R. China
）
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.
Key words: single crystal continuous casting aluminum electric resistance grain boundary
