Materials World Network: Multi-Scale Study of Chemical Vapor Infiltrated Carbon/Carbon Composites

材料世界网络：化学气相渗透碳/碳复合材料的多尺度研究

• 批准号: 0806906
• 负责人: Igor Tsukrov
• 金额: $ 38.4万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0806906&HistoricalAwards=false
• 关键词: Materials; World; Network; Multi; Scale

The objective of this research is to enhance fundamental understanding of the correlation between complex hierarchical microstructure and the mechanical behavior of carbon/carbon composites. This is done by utilizing a multiscale model based on microstructural and mechanical characterization at nano to macro length scales. The model is validated by measuring the mechanical properties on all length scales. Participating investigators correlate microstructure and the mechanical properties with chemical vapor infiltration parameters. Stress concentrations and fracture induced by nanotexture of pyrolytic carbon and by thermal treatment of the composite are also investigated. The project is conducted in close collaboration by researchers from the University of New Hampshire (UNH) and the University of Karlsruhe (UKA), Germany. Material specimens are produced at UKA under controlled processing conditions. The micro and nanostructure of these specimens is characterized at UKA and UNH using various microscopies. Measurements of the micro-constituent mechanical behavior is performed at UNH using nanoindentation methods. Researchers incorporate this information in a unified predictive model of the overall mechanical response of the composite. Finally, macro-mechanical characterization of the material is conducted at UNH and at UKA using standard testing methods to validate the model.The research will result in improvements in manufacturing of carbon/carbon composites that will benefit society mainly through technological advances in aeronautics and aerospace industries, although potential impact is also anticipated in emerging areas of applications of the composites such as biomedical devices, heating elements, and hardware for metal forming and glass making. The characterization and modeling approaches developed in this research will also be relevant to a wide class of composite and heterogeneous materials having complex nanostructures, including high performance ceramic coatings, nanostructured electromagnetic interference shielding materials, and composites consisting of carbon fibers coated by pyrolytic carbon placed in a different ceramic matrix (e.g. SiC). Five graduate students from the US and Germany and two-to-four undergraduate students from UNH are educated in a collaborative, international setting. Each of them will impact their peers and colleagues with their experience.

本研究的目的是增强对复杂分级微观结构与碳/碳复合材料机械行为之间相关性的基本理解。这是通过利用基于纳米到宏观长度尺度的微观结构和机械表征的多尺度模型来完成的。通过测量所有长度尺度上的机械性能来验证模型。参与研究人员将微观结构和机械性能与化学蒸气渗透参数相关联。还研究了热解碳纳米结构和复合材料热处理引起的应力集中和断裂。该项目由新罕布什尔大学 (UNH) 和德国卡尔斯鲁厄大学 (UKA) 的研究人员密切合作进行。材料样本是在 UKA 受控的加工条件下生产的。 UKA 和 UNH 使用各种显微镜对这些样本的微米和纳米结构进行了表征。 UNH 使用纳米压痕方法对微观成分的机械行为进行了测量。研究人员将这些信息纳入复合材料整体机械响应的统一预测模型中。最后，UNH 和 UKA 使用标准测试方法对材料进行宏观机械表征以验证模型。该研究将改进碳/碳复合材料的制造，主要通过航空航天领域的技术进步造福社会行业，尽管预计复合材料的新兴应用领域也会产生潜在影响，例如生物医学设备、加热元件以及金属成型和玻璃制造的硬件。本研究开发的表征和建模方法也将与具有复杂纳米结构的多种复合材料和异质材料相关，包括高性能陶瓷涂层、纳米结构电磁干扰屏蔽材料以及由热解碳涂覆的碳纤维组成的复合材料。不同的陶瓷基体（例如 SiC）。来自美国和德国的五名研究生以及来自新罕布什尔大学的两到四名本科生在协作的国际环境中接受教育。他们每个人都会用他们的经验影响他们的同事和同事。