Influence of mass ratios between SiC particles and chopped carbon fibers on properties of C/SiC/SiO2 porous ceramics. Issue 8 (15th April 2021)

• Record Type: Journal Article
• Authors: Zhang, Bo; Huang, Haiming; Zhao, Buyue; Huang, Jie; Li, Weijie
• Is Part Of: Ceramics international. Volume 47:Issue 8(2021)
• Page Start: 11574
• Page End: 11580
• Publication Date: 2021-04-15
• Subjects: Chopped carbon fibers -- C/SiC/SiO2 porous ceramic -- Transpiration cooling -- Optimized grinding-mould pressing-sintering process -- Permeability; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.12.288
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Transpiration cooling in the thermal protection system of hypersonic vehicles still remains a challenge due to the lack of lightweight porous ceramic with excellent permeability. C/SiC/SiO2 porous ceramics with low density and good permeability are fabricated by optimized grinding-mould pressing-sintering process. The influences of different mass ratios between SiC particles and chopped carbon fibers on the microscopic structure, mechanical performance, pore-size distribution and permeability of the porous ceramics are studied systematically. C/SiC/SiO2 porous ceramics with density of 1.092～1.327 g/cm 3, compressive strength of 1.55～15.7 MPa, permeability of 5.903 × 10 –8 ～13.434 × 10 -8 mm 2, as well as uniform microstructure and pore-size distribution have been obtained with the increasing of the mass ratios. Notably, the densities and compressive strengths of C/SiC/SiO2 porous ceramics improve gradually but their permeabilities decrease with the increasing of mass ratio between SiC particles and chopped carbon fibers from 0.3:1 to 1:1. The porous ceramics fabricated by optimized processing method can have a potential application in the transpiration cooling.