Effect of Ti3SiC2 on the ablation behavior and mechanism of Cf-C-SiC-Ti3SiC2 composites under oxyacetylene torch at 3000 °C
Effect of Ti3SiC2 on the ablation behavior and mechanism of Cf-C-SiC-Ti3SiC2 composites under oxyacetylene torch at 3000 °C
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DOI：
10.1016/j.ceramint.2018.09.244
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发表时间：
2019
影响因子：
5.2
通讯作者：
O. Yaghobizadeh;A. Sedghi;H. Baharvandi
中科院分区：
文献类型：
--
作者：
O. Yaghobizadeh;A. Sedghi;H. Baharvandi
研究了液态硅浸渍（LSI）法制备的Cf-C-SiC和Cf-C-SiC- ti3sic2复合材料的耐烧蚀性能。浸渍过程在1500 °C下进行30 min，然后在1350 °C下退火。利用x射线衍射（XRD）技术和扫描电子显微镜（SEM）对烧蚀样品的物相组成和微观结构进行了研究。结果表明，与Cf-C-SiC复合材料相比，Cf-C-SiC- ti3sic2复合材料的质量烧蚀率和线性烧蚀率分别提高了50%和37.5%。Cf-C-SiC复合材料的质量和线烧蚀速率分别为23.8 mg/s和0.096 mm/s， Cf-C-SiC- ti3sic2的质量和线烧蚀速率分别为11.8 mg/s和0.06 mm/s。微观研究表明，保护氧化层的形成及其在含max复合材料表面的稳定性是改善烧蚀性能的主要原因。而Cf-C-SiC复合材料上形成的氧化膜被火焰吹散。
In this research, ablation resistance of Cf-C-SiC and Cf-C-SiC-Ti3SiC2composites, fabricated by liquid silicon infiltration (LSI) method were investigated. The infiltration process was conducted at 1500 °C for 30 min and then the samples were annealed at 1350 °C. X-ray diffraction (XRD) technique and scanning electron microscopy (SEM) were utilized in order to investigate the phase composition and microstructure of the ablated samples, respectively. When compared with Cf-C-SiC composite, results showed that mass and linear ablation rates of Cf-C-SiC-Ti3SiC2composite have been improved by 50% and 37.5%, respectively. The mass and linear ablations rates of Cf-C-SiC composite were reached to 23.8 mg/s and 0.096 mm/s, respectively, while these values for Cf-C-SiC-Ti3SiC2were reached to 11.8 mg/s and 0.06 mm/s, respectively. Microscopic investigations showed that formation of protective oxide layer and its stability on the surface of MAX-containing composite are the main reasons for improvement of ablation properties. While the oxide film formed on Cf-C-SiC composite has been blown away by flame.