摘要
广泛应用于航空航天领域的炭/炭复合材料,主要缺点在于其与基体结构密切相关的抗低温氧化能力差。因而采用针刺整体毡作增强体,对具有不同基体炭结构的C/C复合材料在静态空气中的低温变温氧化特性和流动氧气气氛中的低温恒温氧化特性进行了实验研究,并结合材料的金相显微结构及氧化后的显微组织,对其氧化性能进行了分析。结果表明:在1000℃以下的有氧条件下,无论是变温氧化试验还是恒温氧化试验,以树脂炭为基体的C/C复合材料氧化性能均优于具有典型带状结构热解炭和树脂的混合基体C/C复合材料,且氧化优先从材料各类界面、孔隙和缺陷处开始。
C/C composites are extensively used in the field of aviation and aerospace, however it exists the principal defect of lower low-temperature oxidation-resistant performance, which is closely related with its' matrix materials, therby the oxidation behavior of C/C composites with integrated carbon felts and different matrix in static atmosphere and flowing oxygen at low temperature were experimentally studied and discussed according to their microstructure and SEM photos after oxidation. It results in that under 1000℃, no matter what kind of oxidation, Oxidation of resin-based martrix materials is better than those with pyrocarbon(typical structure of smooth laminar and rough laminar) and resin based carbon. Oxidation would always begin from interfaces, pores and lacunae.
出处
《粉末冶金材料科学与工程》
EI
2005年第4期252-256,共5页
Materials Science and Engineering of Powder Metallurgy
基金
国家"863"计划资助项目(2002AA305207)
关键词
炭/炭复合材料
低温氧化
氧化速率
C/C composites
oxidation at low temperature
oxidation rates
