Taking the three-directional orthogonal preform with different Z-direction fiber distance as the research object, the carbon/carbon (C/C) composites were prepared by the combination of chemical vapor infiltration and resin impregnation, and the effect of weaving parameters on the microstructure and bending performance of C/C composites were studied. The calculation model was established by taking the smallest repeated structure of three-directional orthogonal preform as a unit, and the relationship between fiber content and weaving parameters of three-directional preform was obtained and verified. The results show that the fiber content of preform is increased with the decrease of Z-direction fiber distance and X, Y-direction fiber layer distance; when the Z-direction fiber distance is increased, the twist deformation of the fiber interweave becomes larger, resulting in the change of the pore structure of the preform; under the same densification process, the change of pore structure affects the composition and distribution of carbon matrix in C/C composites, but has no effect on the morphology of carbon matrix; when the fiber content in X, Y-direction is increased and the distance between fibers in Z-direction is decreased, the flexural strength of the C/C composites is higher.
HUANG Q Z . Fabrication, structure and application of high performance carbon/carbon composites[M]. Changsha: Central South University Press, 2010: 10- 18.
PANG S Y , WANG P Y , HU C L , et al. Carbon fiber preform's structure on mechanical property of C/C composites and bolts[J]. Journal of Inorganic Materials, 2019, 34 (12): 1272- 1278.
3
KOWBEL W , HSU T K . Mechanical behavior of carbon-carbon composites made with cold plasma-treated carbon fibers[J]. Composites, 1995, 26 (11): 791- 797.
doi: 10.1016/0010-4361(95)98200-5
4
DELHAES P . Chemical vapor deposition and infiltration processes of carbon materials[J]. Carbon, 2002, 40 (5): 641- 657.
doi: 10.1016/S0008-6223(01)00195-6
WEI L F , CUI H , JI A L , et al. Effect of preform structure on mechanical properties of three-dimensional braided C/C composites[J]. Carbon, 2017, (1): 5- 9.
GAO J H , LI W . Geometric model of three-dimensional textile reinforced composites[J]. Fiber Composites, 2006, 23 (4): 31- 35.
doi: 10.3969/j.issn.1003-6423.2006.04.009
CHEN L , JIAO W , WANG X M , et al. Research progress on mechanical properties of 3D woven composites[J]. Journal of Materials Engineering, 2020, 48 (8): 62- 72.
YANG C Y , HU Z Y , ZHOU H Y , et al. Influence of 3D woven preform architectures on mechanical properties of C/C composites[J]. Journal of Materials Engineering, 2009, (9): 29- 32.
LIU Y Z , SHAN Z D , ZHAN L , et al. Research on modeling of 3D orthogonal flexible composite preform[J]. Engineering Plastics Applications, 2016, 44 (6): 63- 66.
GUO X F , HUANG G , WANG R , et al. Geometric model of three-dimensional orthogonal woven fabric structures[J]. Acta Materiae Compositae Sinica, 2005, 22 (4): 183- 187.
12
LEE L , RUDOV CLARK S . Effect of weaving damage on the tensile properties of three-dimensional woven composites[J]. Composite Structures, 2002, 57 (4): 405- 413.
13
COX B N , DASKHAH M S . Failure mechanisms of 3D woven composite in tension, compression and bending[J]. Acta Metallurgica et Materialia, 1994, 42 (12): 3967- 3984.
doi: 10.1016/0956-7151(94)90174-0
MA Y , HE T T , CHEN X , et al. Micro-geometry modeling of three-dimensional orthogonal fabric based on digital element approach[J]. Acta Textile Sinica, 2020, 41 (7): 59- 66.
MIAO X Y , GU B H , ZHENG T Y , et al. Geometrical and mathematical characterization of 3D orthogonal woven fabric architecture[J]. Fiber Composites, 2009, 26 (4): 38- 42.
FENG J P , YU H , XU Z F , et al. Bending properties and failure analysis of laminated puncture structural of Cf/Al composites[J]. Chinese Journal of Nonferrous Metals, 2020, 30 (11): 2597- 2604.
SHEN X , LIU X D , TIAN W , et al. Study on mechanical properties of orthogonal and quasi-orthogonal 3D woven composites with combined structure[J]. Modern Textile Technology, 2019, 27 (2): 6- 11.