Graphical Abstract
![](https://wqketang.oss-cn-beijing.aliyuncs.com/zip-unzip/zip-07389c6c-0d8b-4feb-9265-34aaef963b71/jmat-9-3-541/files/jmat-9-3-541-FE1.jpg?Expires=1725761020&OSSAccessKeyId=STS.NTrjfJwvjPeeUmXHZiwKKKeHs&Signature=azCIlYI2uSPLdYLXTnri9OjKH9k%3D&security-token=CAISywJ1q6Ft5B2yfSjIr5fHIdz%2BmqlL56eOV0vprFo8e8RnpKDjkTz2IHtKenhsBOsbtfk1mG5W5%2FgZlqJ9SptIAEfJa9d99MzpL6NEltCT1fau5Jko1beHewHKeTOZsebWZ%2BLmNqC%2FHt6md1HDkAJq3LL%2Bbk%2FMdle5MJqP%2B%2FUFB5ZtKWveVzddA8pMLQZPsdITMWCrVcygKRn3mGHdfiEK00he8TouufTinpHMskGA1Aell7Mvyt6vcsT%2BXa5FJ4xiVtq55utye5fa3TRYgxowr%2Fwo0v0YpGya5YzHXwcPskvdKZbo78UqLQlla6w%2BGqFJqvPxr%2Fp8t%2Fx5fWJKAezhVgs8cVM8JOjIqKOscIsi5si66lGqFV55c8Fdm%2BgUooJVgIMhTnduUfAPJAGOxzJitP%2BUVGGphr60TEnBL4rB5MUctfzRp2mfxS7UTzDnGoABH6jgXBzsc%2BQKWLkDyn6%2BN2jvHyt9Pf4QN3K8aipTqrZ6Ni52W0jIng%2B8kv95K2CyTU1Prjl6A7NToYs1H87Lkl6EiADV4GWwOaRd%2FMsU27VcJBqoQ0BNDBEpoanVHTmRWqVWR6KBRsOULlPuOVELaUcwSImAOeQh3yZxqvtbSMAgAA%3D%3D)
Discover the SciOpen Platform and Achieve Your Research Goals with Ease.
Polysiloxane (PSO) was adopted as the matrix of the repair agents, and SiC-ZrB2 powder was used as the filler, to repair the prefabricated defects on the SiC-ZrB2/SiC (SZS) coating of carbon/carbon (C/C) composites. The repair agents were brushed on the defect areas and then underwent preoxidation (PR) or heat-treatment (HR) in a vacuum. The effects of different treatment processes on the chemical composition, microstructure of the repair agents, and the oxidation resistance behavior of the repaired coating were investigated. The repaired agents after both processes were pyrolyzed and generated SiOC ceramics, and they were well combined with the original coating. The thermal stability of PSO after preoxidation is poorer than that after heat-treatment, resulting in a weight loss rate of 5.88% after oxidation at 1500 ℃ for 270 min, while that of the HR coating is only −0.87%, yet both have been great improvement compared with the unrepaired coating. This work provides an effective and simple approach to repairing damaged coatings for high-temperature applications.
Wang W, Fu Q, Tan B. Effect of in-situ grown SiC nanowires on the mechanical properties of HfC-ZrB2-SiC modified C/C composites. J Alloys Compd 2017;726:866-74.
Wang L, Wang W, Fu Q. The improvement of the self-healing ability of MoSi2 coatings at 900 ~ 1200 ℃ by introducing SiB6. J Eur Ceram Soc 2020;40(8):2896-906.
Fu Y, Zhang Y, Zhang J, Chen G, Li T. Radially one-dimensional hafnium carbide-carbon/carbon networks composites for ultra-high temperature ablation-resistance. Corrosion Sci 2021;185:109443.
Tong M, Fu Q, Yao S, Liu T, Feng T, Hu D, et al. A novel HfSiO wire drawing phenomenon after ablation of SiCnws/HfC-SiC coating on C/C composites. J Materiomics 2020;6(2):263-73.
Feng G, Li H, Yao X, Zhou H, Yu Y, Lu J. Ablation resistance of HfC-TaC/HfC-SiC alternate coating for SiC-coated carbon/carbon composites under cyclic ablation. J Eur Ceram Soc 2021;41(6):3207-18.
Patel M, Saurabh K, Prasad V, Subrahmanyam J. High temperature C/C-SiC composite by liquid silicon infiltration: a literature review. Bull Mater Sci 2012;35(1):63-73.
Su L, Li B, Wang H, Niu M, Fan X. SiOC modified carbon-bonded carbon fiber composite with SiC nanowires enhanced interfibrous junctions. J Am Ceram Soc 2020;103(5):3321-9.
Fang C, Huang B, Yang X, Shi A, Zhang Z, Yi J, et al. Effects of LaB6 on composition, microstructure and ablation property of the HfC-TaC-SiC doped C/C composites prepared by precursor infiltration and pyrolysis. Corrosion Sci 2021;184(6):109347.
Fu Q, Zhang P, Zhuang L, Zhou L, Zhang J, Wang J, et al. Micro/nano multiscale reinforcing strategies toward extreme high-temperature applications: take carbon/carbon composites and their coatings as the examples. J Mater Sci Technol 2021;96:31-68.
Li L, Li H, Li Y, Yin X, Shen Q, Fu Q. A SiC-ZrB2-ZrC coating toughened by electrophoretically-deposited SiC nanowires to protect C/C composites against thermal shock and oxidation. Appl Surf Sci 2015;349:465-71.
Hu D, Fu Q, Zhou L, Li X, Zhang J. Grain growth limitation in the monolayer ZrB2-SiC coating above 1700 ℃. Ceram Int 2022;48(10):14767-77.
Zhou L, Fu Q, Hu D, Zhang J, Wei Y, Zhu J, et al. A dense ZrB2-SiC-Si/SiC-Si coating to protect carbon/carbon composites against oxidation at 1773 K and 1973 K. Corrosion Sci 2021;183:109331.
Grigoriev O, Neshpor I, Vedel D, Mosina T, Silvestroni L. Influence of chromium diboride on the oxidation resistance of ZrB2-MoSi2 and ZrB2-SiC ceramics. J Eur Ceram Soc 2021;41(4):2207-14.
Thimmappa SK, Golla BR, Pitchuka SB, B Prasad VV. Nanoindentation and high temperature oxidation behavior of ZrB2-20SiC-(0-10 wt.%) Ta UHTCs. Ceram Int 2021;47(15):22184-90.
Wang M, Yang L, Yu C, Xu C. Liquid poly(silylacetylene)siloxane resin as a novel precursor of silicon carbide and silicon oxycarbide ceramics. Ceram Int 2012;38(3):2449-54.
Greenough M, Zhao Z, Jacobsohn L, Tong J, Bordia R. Low/intermediate temperature pyrolyzed polysiloxane derived ceramics with increased carbon for electrical applications. J Eur Ceram Soc 2021;41(12):5882-9.
Gumula T, Blazewicz S. Thermal conversion of carbon fibres/polysiloxane composites to carbon fibres/ceramic composites. Ceram Int 2013;39(4):3795-802.
Du B, He C, Shui A, Zhang X, Hong C. Microwave-absorption properties of heterostructural SiC nanowires/SiOC ceramic derived from polysiloxane. Ceram Int 2019;45(1):1208-14.
Rocha R, Cairo C, Graca M. Formation of carbon fiber-reinforced ceramic matrix composites with polysiloxane/silicon derived matrix. Mater Sci Eng, A 2006;437(2):268-73.
Nyczyk-Malinowska A, Niemiec W, Smoa G, Gaweł R, Szuwarzyński M, Grzesik Z. Preparation and characterization of oxidation-resistant black glass (SiCO) coatings obtained by hydrosilylation of polysiloxanes. Surf Coating Technol 2020;407:126760.
Guo J, Zhang Y, Li H, Zhang X. Effect of the sintering temperature on the microstructure, properties and formation mechanism of ceramic materials obtained from polysiloxane elastomer-based ceramizable composites. J Alloys Compd 2016;678:499-505.
Luan X, Chang S, Yu R, Zou Y, Riedelde R, Cheng L. Effect of PSO and TiB2 content on the high temperature adhesion strength of SiBCNO ceramic. Ceram Int 2019;45:9515-21.
Wang X, Wang J, Hao W. Synthesis of a novel preceramic polymer (V-PMS) and its performance in heat-resistant organic adhesives for joining SiC ceramic. J Eur Ceram Soc 2012;32(12):3415-22.
Abass M, Syed A, Gervais C, Singh G. Synthesis and electrochemical performance of a polymer-derived silicon oxycarbide/boron nitride nanotube composite. RSC Adv 2017;7(35):21576-84.
David L, Bhandavat R, Barrera U, Singh G. Silicon oxycarbide glass-graphene composite paper electrode for long-cycle lithium-ion batteries. Nat Commun 2016;7:10998.
Xie S, Wang Y, Lei Y, Wang B, Wu N, Gou Y, et al. A simply prepared flexible SiBOC ultrafine fiber mat with enhanced high-temperature stability and chemical resistance. RSC Adv 2015;5(80):64911-7.
Zhan X, Cai X, Zhang J. A novel crosslinking agent of polymethyl(ketoxime) siloxane for room temperature vulcanized silicone rubbers: synthesis, properties and thermal stability. RSC Adv 2018;8(23):12517-25.
Faisal M, Mahmud H, Deshannavar U, Harbawi M. Effect of incremental curing agent additions on thermal degradation of polydimethylsiloxane in air: a kinetic study. Asian J Chem 2014;26(14):4486-8.
Han Y, Zhang J, Ling S, Qia S, Cheng J, Jin R. Improvement of thermal resistance of polydimethylsiloxanes with polymethylmethoxysiloxane as crosslinker. Polym Degrad Stabil 2008;93(1):242-51.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).