Vapor Grown Carbon Fibers-Reinforced Beryllium Composite

气相生长碳纤维增强铍复合材料

• 批准号: 9361230
• 负责人: Jyh-Ming Ting
• 金额: $ 6.48万
• 依托单位: APPLIED SCIENCES, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-02-01 至 1995-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9361230&HistoricalAwards=false
• 关键词: Vapor; Grown; Carbon; Fibers; Reinforced

9361230 Ting Beryllium is a candidate material for applications requiring low density, strength, and/or thermal performance, such as space structures, heat shields, radiators, and nuclear fusion reactor first wall components. However, the use of beryllium is limited by its moderate thermal conductivity and brittleness, both of which result in a low thermal shock fracture toughness. This also places a limitation on the thickness of a beryllium component, which can impose limits in lifetime for application such as Be plasma facing tiles. It is proposed to develop a graphite-fiber-reinforced beryllium composite which will manifest the advantages of both beryllium and carbon/carbon composites, and which will ameliorate the disadvantages of either one. A preliminary experiment has suggested the advantages of using highly graphitic fiber to eliminate or reduce interface reaction. The graphite fiber proposed for use is vapor grown carbon fiber (VGCF), which is the most graphitic fiber know to be available. In the proposed fabricate the composites. Effort will be directed toward examining interphase formation, if any, between VGCF and Be, and demonstrating a VGCF/Be composite with improved thermal and mechanical properties. ***

小行星9361230 铍青铜是用于需要低密度、强度和/或热性能的应用的候选材料，例如空间结构、隔热屏、散热器和核聚变反应堆第一壁部件。 然而，铍的使用受到其中等导热性和脆性的限制，这两者导致低的热冲击断裂韧性。 这也限制了铍部件的厚度，这可能限制诸如Be等离子体饰面砖的应用的寿命。 提出了一种石墨纤维增强铍基复合材料，它既能体现铍基复合材料和碳/碳复合材料的优点，又能改善两者的缺点。 初步实验表明，采用高石墨化纤维可消除或减少界面反应。 建议使用的石墨纤维是气相生长碳纤维（VGCF），其是已知可用的最石墨化的纤维。 在所提出的制造复合材料。 努力将针对检查VGCF和Be之间的界面形成，如果有的话，并证明VGCF/Be复合材料具有改善的热性能和机械性能。 ***