Ablation behaviors of ultra-high temperature ceramic composites

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 465; no. 1; pp. 1 - 7
• Main Authors: Tang, Sufang, Deng, Jingyi, Wang, Shijun, Liu, Wenchuan, Yang, Ke
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.09.2007; Elsevier
• Subjects: Ablation; C/C composites; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Fullerenes and related materials; diamonds, graphite; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Oxidation; Physics; Specific materials; Tribology and hardness; Ultra-high temperature ceramics; Oxidation; Ultra-high temperature ceramics; Ablation; C/C composites; Carbon carbon composite; Surface morphology; Zirconium borides; Fiber reinforced material; Silicon carbides; Heat flow; Dispersion reinforced material; Carbon fibers; Oxidation resistance; Composite materials; Impact strength; Thermal shock; Preparation; Chemical vapor infiltration; Infiltration; Erosion
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2007.02.040

In order to improve the oxidation resistance of carbon fibers reinforced carbon matrix composites (C/C) and the thermal shock resistance of ultra-high temperature ceramics (UHTCs), large numbers of ZrB 2 based particles were introduced into C/C composites to fabricate the C/C-UHTC composites by powder infiltration (PI) and isothermal chemical vapor infiltration (ICVI). The effects of UHTC additive, heat flux and ablation time on the ablation behaviors of the C/C-UHTC composites were investigated through exposure to an oxyacetylene torch flame with ultra-high temperature. The ZrB 2 addition to the C/C pronouncedly improved the ablation resistance of the material under a 3920 kW/m 2 heat flux and the C/C–ZrB 2 showed a better ablation-resistive property compared to the C/C–4ZrB 2–1SiC, C/C–2ZrB 2–1SiC, C/C–2ZrB 2–1SiC–1HfC and C/C–2ZrB 2–1SiC–1TaC. With decrease of the heat flux from 3200 to 2380 kW/m 2, the presence of a small amount of SiC in the C/C–ZrB 2 was found to have a positive role of improving the ablation resistance; the C/C–4ZrB 2–1SiC exhibited a good ablation-resistive endurance under 2380 kW/m 2. The HfC addition was proved to effectively enhance the ablation property of the C/C–1ZrB 2–2SiC while the TaC addition severely deteriorated the property.