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用化学气相渗透工艺（ＣＶＩ）制备出几种不同密度及不同炭纤维类型增强的单向Ｃ／Ｃ复合材料。在国内自制多功能内耗仪上用扭摆法测试其阻尼性能。结果表明，低密度单向Ｃ／Ｃ复合材料的阻尼随密度的升高而降低。同种工艺条件，高模炭纤维Ｔ－５０增强的单向Ｃ／Ｃ复合材料的阻尼性能优于高强炭纤维Ｔ３００增强的单向Ｃ／Ｃ复合材料，且前者在８０～２００℃范围内有一明显的内耗峰。纤维类型和界面微观结构是影响这类单向Ｃ／Ｃ复合材料阻尼性能的重要因素。
Several unidirectional C / C composites with different density and carbon fiber types were prepared by chemical vapor infiltration process (CVI). In the domestic self-made multi-function internal friction tester with the swing test method to test the damping performance. The results show that the damping of low density unidirectional C / C composites decreases with the increase of density. The same process conditions, high modulus carbon fiber reinforced T-50 unidirectional C / C composite damping properties than the high strength carbon fiber T300 enhanced unidirectional C / C composite, and the former in the 80 ~ 200 ℃ range of a Significant internal friction peak. Fiber type and interfacial microstructure are the important factors affecting the damping performance of this kind of unidirectional C / C composites.