本发明公开了一种液体火箭发动机用石墨材料气孔率测试方法，包括步骤如下：1)测量石墨材料的体积V；2)采用微焦点X光机，对产品进行高精度无损检测，并通过YXLON‑CT软件对检测结果进行三维重建，获得三维模型；3)将三维模型导入到分析软件VG Studio MAX中进行缺陷图像分析，计算其内部缺陷体积V1、V2……Vn；4)基于上述无损检测图像分析结果，计算石墨材料的气孔率。本发明所公开的测试方法可以准确获得石墨材料的气孔率，方法简单可靠，且对产品无破坏性。
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