摘要
单晶铝线材在服役过程中组织性能的变化 ,必然使信号传输质量受到影响 .本文试图通过单晶铝线材进行不同量的变形和不同温度的加热 ,来进行服役过程的模拟研究 ,并且借助于光学显微镜 ,扫描电镜和透射电镜观察以及性能测试来分析其组织性能特征的变化 .研究结果表明 :在纯度很高的铝单晶原始组织中 ,枝晶间仍存有少量的第二相颗粒 .在光学显微镜观察范围内 ,没有看到晶界 ,但在高倍的透射电镜形貌分析中 ,确实存在少量的原始晶界 ,这些晶界上分布着少量明显的共晶相 .单晶铝线材在变形和加热后会产生大量的位错胞、高密度位错和明显的回复再结晶现象 .变形和加热后引起的组织变化已比较明显地影响单晶线材的电阻和信号失真度 ,影响程度相对量分别平均达到 34 .54%和 8.90 % .这些变化显然与形变加热引起的组织变化有关 .
The changes of structures and properties of single crystal Al wire, which is in the course of service, influence the quality of signal transportation inevitably. In this paper, single crystal Al wire is applied to try to simulate and study service process by variable deformation and heat treatment, and try to survey microstructure under optical microscope, SEM and TEM, and analyze its changes of characteristic of structure and property.The results show that it still has a small quantity of secondary phase particles between dendrite in the original structure of high purity single crystal Al. It doesn't show grain boundary under optical microscope. But, it truly has some original grain boundaries with eutectic phase morphology under TEM observation. After deformation and heat treatment, single crystal Al wire will generate a mass of dislocation cells, high density dislocations and evident recovery phenomena. It is clear that structure changes, which are induced by deformation and heat treatment, will influence the electrical resistance and degree of distortion for transporting the signal in single crystal wire. And the average relative quantity of degree of influence can respectively reach 34.54% and 8.90%. These changes related are evidently involved with changes of structure, which are caused by deformation and heat treatment.
出处
《西安工业学院学报》
2000年第4期890-895,共6页
Journal of Xi'an Institute of Technology
基金
国家自然科学基金项目(59971033)
关键词
第二相粒子
晶界共晶相
枝晶
电阻
失真度
单晶
铝
线材
变形
加热
组织性能
secondary phase particles
eutectic phase on grain boundary
dendrite
electrical resistance
degree of distortion
