【摘要】 用透射电子显微镜观察各向同性沥青基石墨纤维中的夹杂物,大多数夹杂物呈鞋形、椭圆形、圆形或纺锤形。所观察到的夹杂物部具有明显的层状结构。而这种结构是由夹杂物内部的片状石墨晶体平行堆叠形成的。这些片状石墨在取向上都与纤维轴相垂直。在夹杂物内部还发现了垂直于纤维轴的裂纹。更多还原

【Abstract】 Structure of inclusions in isotropic pitch-based graphite fibers have been investigated by using TEM. The longitudinal sections of most inclusions are shoe-shaped, ellipsoidal or circular. These inclusions have layer structure which consists of a number of flaky crystallites. Theses flaky crystallites are parallel to each other and perpendicular to the fiber axis. Fissures which are perpendicular to the fiber axis have been found inside the inclusion.更多还原