D2: Coating of carbon fibre textile preforms to improve the infiltration properties and stability in aluminum alloys

D2：碳纤维纺织预制件的涂层，以提高铝合金中的渗透性能和稳定性

• 批准号: 184352679
• 负责人: Dr. Ingolf Endler
• 金额: --
• 依托单位: Fraunhofer-Institut für Keramische Technologien und Systeme (IKTS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/184352679?language=en
• 关键词: D2; Coating; carbon; fibre; textile

Aluminum matrix composites are well known for applications in light-weight materials. But molten aluminum alloys are highly reactive and therefore reactions between fibre and matrix materials in the interface and formation of metal carbides as Al4C3 are a major problem. These reactions result in a degradation of the mechanical properties and corrosion resistance of the composite materials.The main aim of ifWW and Fraunhofer IKTS is the development of protective coatings or coating systems for the carbon fibre based 3D textile preforms by chemical vapor deposition (CVD) to prevent reactions between fibre and molten metal at high temperatures. Furthermore the developed layers should improve the wettability and infiltration properties of the coated preforms. Layer development will be carried out with different material systems including TiN, Al2O3 and SiC. Coatings which vary in crystallinity, phase composition and stoichiometry will be deposited as well as gradient layers or multilayer systems. Characterization comprises the examination of the layer properties like coating thickness, coating thickness distribution, adhesion, oxidation resistance and mechanical properties. Further investigations are related to the interface between fibre and coating and later to the interface of coated fibre and the metal matrix. Wettability and chemical resistance of the coated textiles and mechanical properties of the composite will be evaluated. Infiltration will be done by the project partners ILK and ZMP. Finally a continuously working CVD equipment will be designed for the best coating system.

铝基复合材料在轻质材料中的应用是众所周知的。但是熔融铝合金是高度反应性的，因此纤维和基体材料之间在界面中的反应以及金属碳化物如Al4C3的形成是一个主要问题。这些反应会导致复合材料的机械性能和耐腐蚀性下降。ifWW和Fraunhofer IKTS的主要目标是通过化学气相沉积（CVD）为碳纤维基3D织物预制件开发保护涂层或涂层系统，以防止纤维和熔融金属在高温下发生反应。此外，开发的层应改善涂覆的预成型件的润湿性和渗透性。将使用不同的材料系统（包括TiN、Al2O3和SiC）进行层开发。将沉积结晶度、相组成和化学计量不同的涂层以及梯度层或多层系统。表征包括检查涂层特性，如涂层厚度、涂层厚度分布、附着力、抗氧化性和机械性能。进一步的研究涉及到纤维和涂层之间的界面，后来涂层纤维和金属基体的界面。将评估涂层纺织品的耐湿性和耐化学性以及复合材料的机械性能。渗透将由项目合作伙伴ILK和ZMP完成。最后，设计一台连续工作的CVD设备，以获得最佳的涂层系统。