Effects of the particle size composition of sintering additives on pore characteristics, flexural strength, and gas permeability of liquid-phase-bonded macroporous SiC
- Authors
- Yun, Sung Il; Nahm, Sahn; Park, Sang Whan
- Issue Date
- 11월-2021
- Publisher
- SPRINGER HEIDELBERG
- Keywords
- Flexural strength; Particle size composition; Permeability; Pore structure; Sintering additives
- Citation
- JOURNAL OF THE KOREAN CERAMIC SOCIETY, v.58, no.6, pp.737 - 746
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN CERAMIC SOCIETY
- Volume
- 58
- Number
- 6
- Start Page
- 737
- End Page
- 746
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/135834
- DOI
- 10.1007/s43207-021-00148-y
- ISSN
- 1229-7801
- Abstract
- Macroporous SiC with unimodal pore-size distribution was fabricated using a liquid-phase bonding method with Al2O3-Y2O3-SiO2 sintering additives at 1500 degrees C in Ar at for 1 h. The effects of the sintering additive particle size and content on the flexural strength, apparent porosity, gas permeability, and pore characteristics, such as average pore size and pore structure, were investigated. The pore size and porosity of the TA-SC specimens fabricated using relatively large sintering additive particles increased simultaneously, thus changing their pore structure. The pore structure of SA-SC mainly consisted of stacked cubic solid spheres, while the pore structure of TA-SC consisted of spherical pores with cubic stacking. The TA-SC specimens with higher porosity and larger pores exhibited higher flexural strengths than the SA-SC specimens. This can mainly be attributed to the difference in the pore structures of the SA-SC and TA-SC specimens, which directly affected the solid bonding area. The gas permeability of the SA-SC and TA-SC specimens varied from 2.5 x 10(-12) to 4.1 x 10(-12) m(2) depending on their porosity and pore size. The effect of the apparent porosity was more significant on the gas permeability than that on the average pore size, particularly for the porous SiC with the porosity of 33.5-39.7 vol% and the average pore size of 13.4-18.5 mu m.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.