Synthesis of processable matrix resin for carbon fiber‐reinforced ultra‐high temperature ceramic matrix composites.
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| Title: | Synthesis of processable matrix resin for carbon fiber‐reinforced ultra‐high temperature ceramic matrix composites. |
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| Authors: | Rajasekhar, Buragadda V.1,2 (AUTHOR), Kamal, Anurag2 (AUTHOR), Devapal, Deepa2 (AUTHOR), N, RameshBabu1 (AUTHOR) nrb@nitt.edu |
| Source: | Journal of the American Ceramic Society. Dec2025, Vol. 108 Issue 12, p1-17. 17p. |
| Subjects: | Ceramic-matrix composites, Ultra-high-temperature ceramics, Ceramic material manufacturing, Sol-gel processes, Polymerization, Polymeric composites, Fibrous composites, Ceramic engineering |
| Abstract: | Pre‐ceramic polymers comprising of Zr, C, B, Si, and O in a single system named as family of zirconoborosiloxane (ZBS) with a high ceramic yield of 83 wt.% at 1200°C were synthesized by non‐aqueous sol‒gel approach. With eight different molar feed ratios, ceramic conversion studies were carried out at 1500°C and 1650°C in argon, and three different heating rates were employed. The polymers were analyzed for their functional groups, ceramic residue, molecular weight, viscosity, and specific gravity. The evolution of various ceramic phases by varying the heating/cooling rate, morphology, elemental composition, and mapping was studied and carbon content was analyzed. Zirconia in monoclinic and tetragonal crystal structures and zircon were obtained as major ceramic phases. Silica or silicon carbide was not observed with the precursor feeds, heat‐treatment temperatures or heating rate combinations used in this study. The carbon content of the ceramics formed was found to be present in very low concentrations. ZBS was completely converted into oxide‐free ceramics of ZrC, ZrB2, and SiC using polyimide and divinylbenzene as carbon source at temperatures as low as 1500°C. Thus, ZBS in combination with polyimide and divinylbenzene in liquid form is proposed as matrix resin for ultra‐high temperature ceramic matrix composites. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Pre‐ceramic polymers comprising of Zr, C, B, Si, and O in a single system named as family of zirconoborosiloxane (ZBS) with a high ceramic yield of 83 wt.% at 1200°C were synthesized by non‐aqueous sol‒gel approach. With eight different molar feed ratios, ceramic conversion studies were carried out at 1500°C and 1650°C in argon, and three different heating rates were employed. The polymers were analyzed for their functional groups, ceramic residue, molecular weight, viscosity, and specific gravity. The evolution of various ceramic phases by varying the heating/cooling rate, morphology, elemental composition, and mapping was studied and carbon content was analyzed. Zirconia in monoclinic and tetragonal crystal structures and zircon were obtained as major ceramic phases. Silica or silicon carbide was not observed with the precursor feeds, heat‐treatment temperatures or heating rate combinations used in this study. The carbon content of the ceramics formed was found to be present in very low concentrations. ZBS was completely converted into oxide‐free ceramics of ZrC, ZrB2, and SiC using polyimide and divinylbenzene as carbon source at temperatures as low as 1500°C. Thus, ZBS in combination with polyimide and divinylbenzene in liquid form is proposed as matrix resin for ultra‐high temperature ceramic matrix composites. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00027820 |
| DOI: | 10.1111/jace.20697 |
