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以光学显微镜和扫描电子显微镜为主要手段，观察和分析了用纤维拉伸破坏的断口表面，结果表明：硼纤维的断裂均起源于固有的缺陷和裂纹。将所观察到的断裂类型进行归纳和分类，并对沉积工艺进行相应的改进，从而避免或减少了缺陷和裂纹的出现，提高了硼纤维的拉伸强度。
Using optical microscopy and scanning electron microscopy as the main means, the fracture surface destroyed by fiber tension was observed and analyzed. The results show that the fracture of boron fibers all originated from the inherent defects and cracks. The observed fracture types are summarized and classified, and the deposition process is improved correspondingly so as to avoid or reduce the appearance of defects and cracks and improve the tensile strength of boron fibers.