SBIR Phase I: High-Efficiency Closed-System Chemical Vapor Infiltration (CVI) Process

SBIR 第一阶段：高效闭路系统化学气相渗透 (CVI) 工艺

• 批准号: 9560313
• 负责人: Arthur Fortini
• 金额: $ 7.5万
• 依托单位: ULTRAMET, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-05-01 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9560313&HistoricalAwards=false
• 关键词: SBIR; Phase; Efficiency; Closed; System

This Small Business Innovation Research (SBIR) Phase I project will demonstrate the feasibility of a novel, high-efficiency process for the infiltration/densification of fiber preforms. This method, designated closed-system chemical vapor infiltration (CSCVI), offers several advantages over conventional CVI. Raw material is used in a highly efficient manner, and unreacted raw material is easily recycled for future use, thereby minimizing materials costs. Because the process takes place inside a sealed system, there is no waste stream, and only extremely small amounts of hazardous material are used. The dramatic reduction in the waste stream translates into greatly reduced costs for waste treatment. This project will specifically address the manufacture of fiber-reinforced ceramic matrix composites (CMCs). By operating at high efficiencies and minimizing the waste stream, it is expected that the cost reduction per part will be about 45%, based on material costs alone. Furthermore, because the waste stream is reduced by orders of magnitude, capital equipment required for waste treatment will be greatly reduced. Essentially any system currently utilizing conventional CVI can benefit from the application of CSCVI. A successful demonstration of CSCVI is expected to improve the economics of ceramic matrix composites. CMCs have benefitted from the success of carbon/silicon carbide (C/SiC) and SiC/SiC materials. The cost of these materials is quite high, however, and any technique that will significantly reduce their cost is expected to find a large commercial market.

该小型企业创新研究（SBIR）第一阶段项目将展示一种新型高效纤维预制件渗透/致密化工艺的可行性。 这种方法，指定的封闭系统化学气相渗透（CSCVI），提供了几个优势，比传统的CVI。 原材料的使用效率高，未反应的原材料易于回收利用，从而最大限度地降低了材料成本。 由于该过程在密封系统内进行，因此没有废物流，仅使用极少量的危险材料。 废物流的显著减少转化为废物处理成本的大幅降低。 该项目将专门针对纤维增强陶瓷基复合材料（CMC）的制造。 通过高效率运行和最大限度地减少废物流，预计仅基于材料成本，每个部件的成本将降低约45%。 此外，由于废物流减少了几个数量级，废物处理所需的资本设备将大大减少。 基本上，目前使用传统CVI的任何系统都可以从CSCVI的应用中受益。 CSCVI的成功示范有望提高陶瓷基复合材料的经济性。 CMC受益于碳/碳化硅（C/SiC）和SiC/SiC材料的成功。 然而，这些材料的成本相当高，任何将显著降低其成本的技术都有望找到一个巨大的商业市场。