摘要
本文系统地讨论了一种优等石墨电极的结构、力学性能随径向位置的变化,对气孔率、针状焦品粒取向角等结构参数以及弹性模量、抗弯强度、临界应力强度因子等力学参量和径向应置的关系作了定量的回归分析。结果表明,该电极结构参数、力学性能与位置之间存在着显著的相关性。密度、弹性模量、抗弯强度、临界应力强度因子等均随距电极中心轴距离的增加而线性地增加;气孔率则随距离的增加而线性地减小;晶粒平均取向角的三次方随距离的增加而线性地减小。力学性能随位置的变化主要是由于结构参数、气孔率和平均晶粒取向角的变化所致。
This paper reports a systematic study on the variations of the structure and mechanical properties of a premium grade graphite electrode. Quantitative regression analysis is made between structural parameters such as porosity, the orientation angle of needle-coke grains and the distance from the center of the graphite electrode. Quantitative correlations between mechanical properties, including elastic modulus, bending strength, critical stress intensity factor, and the distance are also made. The results show that the correlation between structural and mechanical parameters and the distance in the graphite electrode are significant. The graphite's bulk density, modulus, bending strength and critical stress intensity factor all increase linearly with the increase of the distance from the electrode center, while total fractional porosity decreases linearly. It is found that the third power of the average grain orientation angle also decreases linearly with increasing distance. The variation of mechanical propties as a function of distance are attributed to the changes of structural parameters, mainly the total fractional porosity and the average orietation angle.
出处
《炭素技术》
CAS
CSCD
1992年第4期1-6,共6页
Carbon Techniques
