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Significant improvement of the self-protection capability of ultra-high temperature ceramic matrix composites

机译:超高温陶瓷基复合材料自我保护能力的显着提高

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The oxidation behaviour of Cf/ZrB2-SiC with different fibre architectures, manufactured by slurry impregnation, polymer infiltration and mild pyrolysis, was investigated. Short term oxidation tests in air were performed for 1 min and 5 min at 1500 degrees C and 1650 degrees C in a bottom loading furnace. Microstructure, oxide scale thickness and composition were analysed by SEM/EDS/XRD. Results indicated that a good dispersion of ZrB2 particles in the polymer derived SiC(O) matrix promoted the formation of compact scales filling surface holes left by fibre oxidation. 20-30 vol% of ZrB2 in the material was found a good compromise between lightness and oxidation resistance.
机译:研究了通过浆料浸渍,聚合物浸润和轻度分解制造的不同光纤架构的CF / ZRB2-SiC的氧化行为。 空气中的短期氧化试验在底部装载炉中以1500℃和1650℃下进行1分钟和5分钟进行。 通过SEM / EDS / XRD分析微观结构,氧化物刻度厚度和组成。 结果表明,聚合物衍生的SiC(O)基质中ZrB2颗粒在聚合物衍生的SiC(O)基质中的良好分散促进了通过纤维氧化留下的紧凑尺度填充表面孔的形成。 在耐光和抗氧化性之间发现20-30克拉%的ZRB2良好的折衷。

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