以炭纤维针刺毡为预制体, 采用化学气相浸渗(CVI)法或结合液相法制备了热解炭、树脂炭和沥青炭基质的准三维C/C复合材料, 研究了这些材料的层间剪切性能及其断裂机理. 结果表明: CVI基质炭比沥青基质炭更有利于C/C复合材料的层间剪切性能的提高; 剪切强度随密度增高而增大, 致密度越高, 基体支撑越强, 同时微裂纹和孔隙度就越低, 断裂裂纹不易形成或扩展, 强度性能就越好; 纯沥青基质炭试样为"突发"的脆性断裂方式, 其他基质炭试样表现为韧性断裂方式.
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