Porous SiC ceramics prepared via freeze-casting and solid state sintering
Source abstract
Abstract
Abstract Porous SiC ceramics were prepared by freeze-casting process. In order to enhance the mechanical properties of the porous SiC, poly(vinyl alcohol) (PVA) was added as binder and pore morphology controller in this work. The results indicated that high porosity (>60%) SiC ceramics was obtained although the sintering temperature was over 2000 °C. The pore structure could be divided into two kinds: macropores generated by sublimation of large ice crystals, and micropores in the ceramic matrix caused by sublimating of small ice crystals, stacking of SiC particles, and burning out of PVA. With the increase of the sintering temperature, the specimens exhibited higher density, thus resulted in higher strength. Porous SiC ceramics sintered at 2100 °C showed a good flexural strength of 11.25 MPa with an open porosity as high as 66.46%.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Aluminum Alloys Composites Properties · Advanced materials and composites
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References (23)
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1. Impact of char and ash fines on porous ceramic filter life10.1016/S0378-3820(97)00088-X ↗
2. High-temperature strength of silicon carbide ceramics sintered with rare-earth oxide and aluminum nitride10.1016/j.actamat.2006.08.059 ↗
3. Effects of CeO2 addition on the properties of cordierite-bonded porous SiC ceramics10.1016/j.jeurceramsoc.2008.11.002 ↗
4. Low-temperature fabrication and characterization of porous SiC ceramics using silicone resin as binder10.1016/j.ceramint.2006.08.018 ↗
5. Effect of Y2O3 addition on the properties of reaction-bonded porous SiC ceramics10.1016/j.ceramint.2005.03.024 ↗
6. Fabrication and characterization of cordierite-bonded porous SiC ceramics10.1016/j.ceramint.2008.01.025 ↗
7. Thermal shock resistance of in situ reaction bonded porous silicon carbide ceramics10.1016/j.msea.2006.03.075 ↗
8. High temperature sintering of SiC with oxide additives III. Quantitative vaporization of SiC–Al2O3 powder beds10.1016/S0955-2219(02)00069-9 ↗
9. High temperature sintering of SiC with oxide additives II. Vaporization processes in powder beds and gas10.1016/S0955-2219(02)00068-7 ↗
10. High temperature sintering of SiC with oxide additives I. Analysis in the SiC–Al2O3 and SiC–Al2O3–Y2O3 systems10.1016/S0955-2219(02)00067-5 ↗
11. Effect of additives on the activation energy for sintering of silicon carbide10.1111/j.1551-2916.2008.02271.x ↗
12. An aqueous gelcasting process for sintered silicon carbide ceramics10.1111/j.1551-2916.2006.01198.x ↗
13. Fabrication of SiCf/SiC composites by SITE-P process10.1016/j.jnucmat.2012.04.023 ↗
14. Highly dense and fine-grained SiC with a Sc-nitrate sintering additive10.1016/j.jeurceramsoc.2013.10.001 ↗
15. Preparation of SiC ceramics by aqueous gelcasting and pressureless sintering10.1016/j.msea.2006.08.047 ↗
16. Fabrication of pure SiC ceramic foams using SiO2 as a foaming agent via high-temperature recrystallization10.1016/j.msea.2010.12.063 ↗
17. Controlled freezing and freeze drying: a versatile route for porous and micro-/nano-structured materials10.1002/jctb.2495 ↗
18. Shaping of porous alumina bodies by freeze casting10.1179/174367608X369280 ↗
19. Mechanical properties of solid-sintered porous silicon carbide ceramics10.1002/adem.201200278 ↗
20. Ice recrystallization inhibition and molecular recognition of ice faces by poly(vinyl alcohol)10.1002/cphc.200600533 ↗
21. Antifreeze (glyco)protein mimetic behavior of poly(vinyl alcohol): detailed structure ice recrystallization inhibition activity study10.1021/bm400217j ↗
22. Properties of microstructure-montrollable porous yttria-stabilized ziroconia ceramics fabricated by freeze casting10.1111/j.1744-7402.2008.02190.x ↗
23. Effect of polyvinyl alcohol additive on the pore structure and morphology of the freeze-cast hydroxyapatite ceramics10.1016/j.msec.2009.11.003 ↗