Low-temperature thermally modified fir-derived biomorphic C–SiC composites prepared by sol-gel infiltration
dc.contributor.author | Li, Guo-Qing | |
dc.contributor.author | Yu, Min | |
dc.contributor.author | Luo, Hang | |
dc.contributor.author | Huang, Ze-Ya | |
dc.contributor.author | Fu, Ren-Li | |
dc.contributor.author | Gucci, Francesco | |
dc.contributor.author | Saunders, Theo | |
dc.contributor.author | Zhu, Kong-Jun | |
dc.contributor.author | Zhang, Dou | |
dc.date.accessioned | 2023-01-04T10:17:49Z | |
dc.date.available | 2023-01-04T10:17:49Z | |
dc.date.issued | 2023-02-10 | |
dc.description.abstract | In order to solve the problems (i.e. low infiltration efficiency, cracks, interface separation and poor mechanical properties) in the process of wood-derived C–SiC composites, the thermal modification of fir at low temperatures (300 °C ∼ 350 °C) combined with sol-gel infiltration was used to successfully produce biomorphic ceramics. The prepared materials were comprehensively characterized and exhibited improved interfacial bonding between C and SiC and mechanical properties. The weight gain per unit volume (0.123 g/cm3) of SiO2 gel in the fir thermally modified at 300 °C is 167.4%, higher than that (0.046 g/cm3) of the unmodified fir. A well-bonded interface was formed between the SiO2 gel and the pore wall of the fir thermally modified at 300 °C. With the increase of modification temperature from 300 °C to 350 °C, the distance between SiO2 gel and the pore wall increases, and a gap (1–3 μm) is observed between SiO2 gel and the pore wall of the fir carbonized at 600 °C. The C–SiC composites sintered at 1400 °C exhibited the highest compressive strength and bending strength of 40.8 ± 5.8 MPa and 11.7 ± 2.1 MPa, respectively, owing to the well-bonded interface between C of fir thermally modified at 300 °C and SiC. However, the composites sintered at 1600 °C for 120 min exhibited the lowest compressive strength and bending strength of 28.1 ± 13.4 MPa and 5.7 ± 1.6 MPa, respectively, which are 31.1% and 51.3% lower than those sintered at 1400 °C for 120 min, respectively. This might result from the porous structure formed by the excessive consumption of fir-derived carbon during the reaction between C and SiO2 at 1600 °C for 120 min. Therefore, thermal modification in the preparation of biomorphic C–SiC composites can promote slurry infiltration and the formation of a well-bonded interface between C and SiC, thus improving the mechanical properties of the composites. | en_UK |
dc.identifier.citation | Li GQ, Yu M, Luo H, et al., (2023) Low-temperature thermally modified fir-derived biomorphic C–SiC composites prepared by sol-gel infiltration. Ceramics International, Volume 49, Issue 6, March 2023, pp. 9523-9533 | en_UK |
dc.identifier.issn | 0272-8842 | |
dc.identifier.uri | https://doi.org/10.1016/j.ceramint.2022.11.119 | |
dc.identifier.uri | https://dspace.lib.cranfield.ac.uk/handle/1826/18836 | |
dc.language.iso | en | en_UK |
dc.publisher | Elsevier | en_UK |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Thermally modified fir | en_UK |
dc.subject | Sol-gel | en_UK |
dc.subject | Composites | en_UK |
dc.subject | Compressive strength | en_UK |
dc.subject | Bending strength | en_UK |
dc.title | Low-temperature thermally modified fir-derived biomorphic C–SiC composites prepared by sol-gel infiltration | en_UK |
dc.type | Article | en_UK |
Files
Original bundle
1 - 1 of 1
Loading...
- Name:
- composites_prepared_by_sol-gel_infiltration-2022.pdf
- Size:
- 3.24 MB
- Format:
- Adobe Portable Document Format
- Description:
License bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- license.txt
- Size:
- 1.63 KB
- Format:
- Item-specific license agreed upon to submission
- Description: