Dynamic oxidation protective ultrahigh temperature ceramic TaB2-20%wtSiC composite coating for carbon material

Ren, Xuanru; Wang, Wenhao; Shang, Tianqi; Mo, Hongsheng; Feng, Peizhong; Guo, Litong; Li, Ziyu

doi:10.1016/j.compositesb.2018.10.080

Cited by 31 publications

(7 citation statements)

References 37 publications

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“…These particles provided nuclei for dendrite growth so that the part area of the coating surface was covered by the dendrites. It is beyond disputed that the dendrite structure contributes to the deflection of the cracks and the relaxation of the stress [39]. Furthermore, as show in Fig.…”

Section: Resultsmentioning

confidence: 98%

Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range

Ren

et al. 2020

J Adv Ceram

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TaB 2-SiC coating modified by different content of MoSi 2 was fabricated on graphite substrate with SiC inner coating by liquid phase sintering to elevate the anti-oxidation capability of the TaB 2-SiC coatings. As compared to the sample with the TaB 2-40wt%SiC coating, the coating sample modified with MoSi 2 exhibited a weight gain trend at lower temperatures, the fastest weight loss rate went down by 76%, and the relative oxygen permeability value reduced from about 1% to near 0. More importantly, the large amount of SiO 2 glass phase produced over the coating during oxidation was in contact with the modification of MoSi 2 , which was proved to be beneficial to the dispersion of Ta-oxides. A concomitantly formed continuous Ta-Si-O-B compound glass layer showed excellent capacity to prevent oxygen penetration. However, when the TaB 2 content was sacrificed to increase the MoSi 2 content, the relative oxygen permeability of the coating increased instead of decreased. Thus, on the basis of ample TaB 2 content, increasing the MoSi 2 content of the coating is conducive to reducing the relative oxygen permeability of the coatings in a broad temperature region.

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Section: Resultsmentioning

confidence: 98%

Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range

Ren

et al. 2020

J Adv Ceram

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“…These particles provided nuclei for dendrite growth so that the part area of the coating surface was covered by the dendrites. It is beyond disputed that the dendrite structure contributes to the de ection of the cracks and the relaxation of the stress [39]. Furthermore, as show in Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range

Ren

et al. 2020

Preprint

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TaB2-SiC coating modified by different content of MoSi2 was fabricated on graphite substrate with SiC inner coating by liquid phase sintering to elevate the anti-oxidation capability of the TaB2-SiC coatings. As compared to the sample with the TaB2-40wt.%SiC coating, the coating sample modified with MoSi2 exhibited a weight gain trend at lower temperatures, the fastest weight loss rate went down by 76%, and the relative oxygen permeability value reduced from about 1% to near 0. More importantly, the large amount of SiO2 glass phase produced over the coating during oxidation was in contact with the modification of MoSi2, which was proved to be beneficial to the dispersion of Ta-oxides. A concomitantly formed continuous Ta-Si-O-B compound glass layer showed excellent capacity to prevent oxygen penetration. However, when the TaB2 content was sacrificed to increase the MoSi2 content, the relative oxygen permeability of the coating increased instead of decreased. Thus, on the basis of ample TaB2 content, increasing the MoSi2 content of the coating is conducive to reducing the relative oxygen permeability of the coatings in a broad temperature region.

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“…Saha et al conducted the chemical vapor deposition for the in situ growth of SiC coating on the C/C composite, which significantly enhanced the oxidation resistance at 1450 °C. For densifying the SiC coating, TaB 2 was added into the protection layer of the C/C composite, which can arrest the microcrack to block the oxygen diffusion channel by a self-sealing Ta–B–Si–O/SiO 2 network . Furthermore, flexible ZrC/SiC nanofiber mats showed an excellent EMI shielding effectiveness of 20.1 dB under 600 °C, which shows the advantage of the SiC nanofiber in high-temperature EMI shielding applications.…”

Section: Introductionmentioning

confidence: 98%

SiC Nanofiber-Coated Carbon/Carbon Composite for Electromagnetic Interference Shielding

Zhang

Cheng

Sheng

et al. 2022

ACS Appl. Nano Mater.

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Carbon/carbon–silicon carbide (C/C-SiC) composites have been widely reported in aerospace and military projects for their mechanical properties and electromagnetic shielding characteristics. However, high production costs, a complex process, and poor electrical conductivity have prohibited the large-scale application of these excellent EMI shielding materials. Herein, in situ growth of the SiC nanofibers (SiCnf) on carbonized phenolic resin with the reinforcement of graphite fibers is proposed for a strategy to overcome this challenge. The laser-irradiated carbon fibers (LCFs) were filled into the phenolic resin and hot-pressing was conducted; thereafter, the C/C-SiC composites were obtained by high-temperature carbothermal reduction of the LCF/phenolic resin and the industrial silicon power. Because of the conductive network of the LCF, the dense carbon matrix and the decoration of nanoporous SiCnf, the as-prepared SiCnf grown on the LCF/carbonized phenolic resin (LCF/PC-SiC) composite exhibited an EMI shielding effectiveness of 27.86 dB in the X-band at room temperature. This work proposed a new strategy to efficiently fabricate C/C-SiC composites for electromagnetic shielding.

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Dynamic oxidation protective ultrahigh temperature ceramic TaB2-20%wtSiC composite coating for carbon material

Cited by 31 publications

References 37 publications

Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range

Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range

Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range

SiC Nanofiber-Coated Carbon/Carbon Composite for Electromagnetic Interference Shielding

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