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首页> 外文会议>International astronautical congress >FIBER CONTENT EFFECT ON THE PERFORMANCE OF CARBON /CARBON COMPOSITES
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FIBER CONTENT EFFECT ON THE PERFORMANCE OF CARBON /CARBON COMPOSITES

机译：纤维含量对碳/碳复合材料性能的影响

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Carbon matrix/ carbon fiber (C/C) material is a carbon fiber reinforced carbon matrix composites, which have the high strength and elastic modulus at high temperature, good thermal conductivity, excellent characteristics of resistance to erosion and high chemical stability, mechanical strength at high temperature. It has been successfully used in the manufacture of aviation engine nozzle and thermal assemblies of the firebox as well as brake discs for airplane in the aeronautical, astronautical, military, and civil fields. Carbon fiber is an important part of the carbon / carbon composites and also is the main skeleton of the material. The content of carbon fiber has a great influence on the performance of the material. In this paper, the different fiber content (16wt%, 22 wt% and 27 wt%) of carbon / carbon composite's mechanical properties (tensile strength, compressive strength and fiexural strength), thermal properties (coefficient of thermal expansion and thermal conductivity), and ablation resistance (plasma ablation rate) were studied. Three preforms were made by different content of fiber , then were densified by chemical vapor deposition (CVI) and resin impregnation / carbonization RICrepeatedly. The final density of carbon / carbon composites was 1.80g/cm3. And the same time, the performance and scanning electron microscopy microstructural were analyzed. The results showed that: when the carbon fiber content is 27%, the tensile strength, compressive strength, fiexural strength and thermal conductivity of carbon / carbon composites were maximum. But carbon fiber content of 16% is minimum. With the increase of the fiber content, the properties of above had rising trends. However, when the carbon fiber content is 16%, the coefficient of thermal expansion and plasma ablation rate were maximum and the carbon fiber content of 27% was minimum. With the increase of the fiber content, the properties of above were decreased. All carbon / carbon composites' fiber and matrix are linked closely together from SEM analysis. Therefore, the carbon / carbon composites as aerospace structural components which has a strong design performance. Different parts of the aerospace could be designed by different carbon fiber content.
机译：碳基/碳纤维（C / C）材料是碳纤维增强的碳基复合材料，在高温下具有高强度和弹性模量，良好的导热性，优异的抗腐蚀特性和高化学稳定性，在室温下的机械强度高温。它已成功用于制造航空发动机喷嘴和火箱的热组件，以及在航空，航天，军事和民用领域中用于飞机的制动盘。碳纤维是碳/碳复合材料的重要组成部分，也是该材料的主要骨架。碳纤维的含量对材料的性能有很大的影响。在本文中，不同纤维含量（16wt％，22 wt％和27 wt％）的碳/碳复合材料的机械性能（拉伸强度，抗压强度和弯曲强度），热性能（热膨胀系数和导热系数），研究了烧蚀阻力（血浆烧蚀率）。用不同的纤维含量制成三种预成型件，然后分别通过化学气相沉积（CVI）和树脂浸渍/碳化RIC进行致密化。碳/碳复合材料的最终密度为1.80g / cm3。并同时分析了性能和扫描电镜显微组织。结果表明：当碳纤维含量为27％时，碳/碳复合材料的拉伸强度，抗压强度，弯曲强度和导热系数最大。但是碳纤维含量最少为16％。随着纤维含量的增加，上述性能呈上升趋势。然而，当碳纤维含量为16％时，热膨胀系数和等离子体烧蚀率最大，而碳纤维含量为27％最小。随着纤维含量的增加，上述性能降低。通过SEM分析，所有碳/碳复合材料的纤维和基体都紧密连接在一起。因此，碳/碳复合材料作为航空航天结构部件具有很强的设计性能。可以通过不同的碳纤维含量来设计航空航天的不同部分。

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