SFB 551: Carbon from the gas phase: elementary reactions, structures, materials

SFB 551：气相碳：基本反应、结构、材料

• 批准号: 5482225
• 金额: --
• 依托单位: Campus Süd (aufgelöst)
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 1998
• 资助国家: 德国
• 起止时间: 1997-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5482225?language=en
• 关键词: SFB; 551; Carbon; gas; phase

It is the aim to transfer the unique potential of the covalent carbon-carbon bond of sp2-hybridized carbon into high performance materials, for example carbon fiber reinforced carbon. The studies are based on the formation of carbon from the gas phase using chemical vapor deposition from light hydrocarbons such as methane. To achieve the desired aim, homogenous and heterogeneous elementary reactions of carbon formation from light hydrocarbons, micro- and nanostructures of the formed pyrolytic carbon as well as correlations between elementary reactions and structures are investigated. Resulting knowledges are used for a model based, optimized synthesis of carbon fiber reinforced carbon by chemical vapor infiltration of carbon fiber preforms. Optimized synthesis implies high infiltration rates, homogeneous densification and desired, well-defined microstructure or -texture of the infiltrated carbon, which may vary from isotropic to highly textured.Composites consisting of carbon fibers and pyrolytic carbon of well-defined texture, ranging from coated monofilaments up to composite materials with a complex fiber architecture, are characterized by determination of nano- and microstructural as well as nano-, micro- and macromechanical properties. The data are used to develop structure-property relationships and models of failure behavior of carbon fiber reinforced carbon.

其目的是将sp2杂化碳的共价碳-碳键的独特潜力转移到高性能材料中，例如碳纤维增强碳。这些研究基于利用甲烷等轻质烃的化学气相沉积从气相形成碳。为了实现预期目标，研究了轻质烃形成碳的均质和非均质基元反应、所形成的热解碳的微米和纳米结构以及基元反应和结构之间的相关性。由此产生的知识用于通过碳纤维预制件的化学气相渗透来基于模型的碳纤维增强碳的优化合成。优化的合成意味着高渗透率、均匀致密化和所需的、明确的渗透碳微观结构或纹理，其可以从各向同性到高度纹理变化。由碳纤维和具有明确纹理的热解碳组成的复合材料，范围从涂层单丝到具有复杂纤维结构的复合材料，通过测定来表征 纳米和微观结构以及纳米、微观和宏观力学性能。这些数据用于开发碳纤维增强碳的结构-性能关系和失效行为模型。