Long‐term oxidation and ablation behavior of Cf/ZrB2–SiC composites at 1500, 2000, and 2200°C

• Published in: International journal of applied ceramic technology 2023-05, Vol.20 (3), p.1636-1645
• Main Authors: Cheng, Yehong, Zhang, Fan, Ma, Denghao, Zhang, Yixin, Liu, Yaxiong, An, Yumin, Wang, Anzhe, Hu, Ning, Zhao, Libin, Han, Wenbo
• Format: Article
• Language: English
• Subjects: Ablation; carbon fiber; Carbon fibers; ceramic matrix composites; Composite materials; Flexural strength; Fracture toughness; Oxidation resistance; Oxyacetylene; Refractory materials; Specific gravity; Temperature; Thickness; Ultrahigh temperature; Zirconium compounds; ZrB2–SiC
• ISSN: 1546-542X; 1744-7402
• DOI: 10.1111/ijac.14299

Although Cf/ZrB2–SiC composites prepared via direct ink writing combined with low‐temperature hot‐pressing were shown to exhibit high relative density, high preparation efficiency, and excellent flexural strength and fracture toughness in our previous work, their oxidation and ablation resistance at high and ultrahigh temperatures had not been investigated. In this work, the oxidation and ablation resistance of Cf/ZrB2–SiC composites were evaluated via static oxidation at high temperature (1500°C) and oxyacetylene ablation at ultrahigh temperatures (2080 and 2270°C), respectively. The thickness of the oxide layer of the Cf/ZrB2–SiC composites is 600 s, with mass ablation rates of 3.77 × 10−3 and 5.53 × 10−3 mg/(cm2 s), and linear ablation rates of −4.5 × 10−4 and −5.8 × 10−4 mm/s, respectively. Upon an increase in the ablation temperature from 2080 to 2270°C, the thickness of the total oxide layer increases from 360 to 570 μm, and the carbon fibers remain intact in the unaffected region. Moreover, the oxidation and ablation process of Cf/ZrB2–SiC at various temperatures was analyzed and discussed.