摘要
提出了一种由锥形螺旋体所组成的球状石墨结构模型,同时给出了单个锥形螺旋体的主要剖面图。每个锥形螺旋体中石墨的{0001}面绕着锥对称轴连续螺旋生长,其〈0001〉方向近似乎行于锥对称轴。Mg和Ce添加对石墨形核的影响也进行了讨论。这一模型可以更好地解释球状石墨各种截面的组织特征,而且与实验结果基本一致。
A Mechanism of the G.S structure consisted of comical helixes is presented based on TEM, and the arrays of misoriented graphite platelets {0001} in each comical helix are believed to be grew up in spiral. The effects of Mg and Ce additions on the nucleations and growth of graphite are also discussed. The microstructure on the section of G.S observed earlier can be explained satisfactorily in term of the model.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1991年第2期130-133,共4页
Journal of University of Science and Technology Beijing
关键词
铸铁
球状石墨
结构
生长机制
graphite spherulite, conical helix, graphite platelet
