Forced Flow Thermal Gradient Pulse Silicon Carbide Infiltration for Improved Ceramic Composites

强制流热梯度脉冲碳化硅渗透改进陶瓷复合材料

• 批准号: 9060236
• 负责人: Andrew Sherman
• 金额: $ 5万
• 依托单位: ULTRAMET, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9060236&HistoricalAwards=false
• 关键词: Forced; Flow; Thermal; Gradient; Pulse

In response to the need for improved engineered materials for advanced elevated temperature applications, the researchers plan to apply the extensive composite processing experience, knowledge base, and understanding acquired in several ceramic and composite development programs to improving the state-of-the-art in chemical vapor infiltration (CVI) processing. Specifically, the researchers intend to combine the forced-flow thermal gradient and pulse techniques of infiltration, directly resulting in higher quality, more economical silicon carbide (SiC) composites for use in heat exchangers and heat engines. The approach has the potential to solve the recurring difficulty of microporosity between fibers due to inadequate infiltration, eliminate the substantial permeability occurring in current state-of-the-art materials, and improve the economics of composite processing via vastly reduced processing times.

为了响应对用于制造纳米材料的改进的工程材料的需求， 先进的高温应用，研究人员计划 运用丰富的复合材料加工经验、知识 基础，并在几个陶瓷和复合材料获得的理解 发展计划，以提高国家的最先进的化学 气相渗透（CVI）工艺。 具体来说，研究人员 打算将强制流动热梯度和脉冲联合收割机 渗透技术，直接导致更高的质量， 更经济的碳化硅（SiC）复合材料，用于热 热交换器和热发动机。 该方法有可能 解决了纤维间微孔反复出现的难题， 由于渗透不足， 在当前最先进的材料中出现的渗透性，以及 通过大大减少复合材料加工的成本， 处理时间。