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采用博驰仪器测试数据的科研论文-不同结构炭/炭复合材料的低温氧化特性

2016-04-07 09:28:00
博驰仪器
原创
1451
摘要: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。
Oxidation behavior of C/C composites at low temperature
YIN Jian, ZHANG Hong-bo , XIONG Xiang
(State Key Laboratory of Powder Metall urgy , Central South University , Changsha 410083, China)
Abstract: 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 atmos-phere and flowing oxygen at low temperature were experimentally studied and discussed according to their micro-structure and SEM photos after oxidation. It results in that under 1000 ℃, no matter what kind of oxidation, Oxi-dation of resin-based martrix materials is better than those with pyrocarbon(typical structure of smooth laminar andrough laminar) and resin based carbon. Oxidation would always begin from interfaces, pores and lacunae.

Key words: C/C composites;oxidation at low temperature;oxidation rates

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