晶界对信号传输影响的研究及小直径金属线材单晶化技术  

Effects of Grain Boundaries on Transmission Signal and Technique of Manufacturing Metal Wires with Single Crystal

作　　者：严文[1] 陈建[1] 范新会[1] 王鑫[1] 李炳[1] 

机构地区：[1]西安工业学院材料与化工学院

出　　处：《材料导报》2004年第10期60-63,67,共5页Materials Reports

基　　金：国家科学自然基金(59971033);陕西省自然科学基金(2003E101);高等学校优秀青年教师教学科研鼓励计划资助

摘　　要：晶界对传输信号影响规律的研究表明,晶界的电阻率大于晶界两侧晶粒的电阻率是晶界影响传输信号的本质,晶界的三元特性——电阻、电容以及电感特性是晶界对传输信号影响的具体表现形式。提出了金属线材的单晶化技术可将直径较粗的多晶金属线材直接拉制成无限长、直径较细的单晶金属线材。此外,对单晶连铸技术凝固组织的演化进行了初步的模拟,根据模拟结果,探讨和分析了工艺参数对单晶化过程中凝固组织演化的影响规律。The study of effects of grain boundaries on signal transmission in copper wires confirms the essence of the grain boundaries that affects the transmission signal lies in higher resistivity at grain boundary region in comparison with the resistivity within the grain. Three properties of grain boundaries, resistance, capacitance and inductance, play main roles in the signal transmission. The technique for manufacturing metal wire with single crystal(MMSC)is proposed,which can make the ordinary copper wires into single crystal wires with infinite length and very small diameter. The numerical simulation for the solidification process in OCC(ohno continuou casting)is stdied,and effect of process parameters on the solidification microstructure evolution is also discussed.

关 键 词：晶界 凝固组织 金属线材 晶化过程 小直径 单晶 晶粒 多晶 拉制 研究 

分 类 号：TB383[一般工业技术—材料科学与工程] TG146[金属学及工艺—金属材料]