Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第9卷    第1期    总第30期    1999年3月

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文章编号:1004-0609(1999)01-0087-04
单晶连铸铝线材的导电性能
范新会李建国   傅恒志

(西安工业学院材料工程系, 西安 710032

西北工业大学凝固技术国家重点实验室, 西安 710072)

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。

 

关键字: 金属单晶   连续铸造   工业纯铝   电阻率   晶界

ELECTRICAL PROPERTY OF CCSC ALUMINUM WIRE
Fan Xinhui

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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