TY - JOUR
T1 - Effects of the size distribution of SiC powders on the microstructures and properties of liquid phase bonded porous SiC with neck bonding phases of Y4Al2O9, Y3A5O12, Y2Si2O7, and Al2O3
AU - YUN, Sung Il
AU - NAHM, Sahn
AU - PARK, Sang Whan
N1 - Funding Information:
Acknowledgments This study was supported by a grant from the Fundamental R&D Program of the Ministry of Trade, Industry, and Energy, Republic of Korea and Korea Institute of Science and Technology, Republic of Korea.
Publisher Copyright:
© 2021 The Ceramic Society of Japan.
PY - 2021/11/1
Y1 - 2021/11/1
N2 - Liquid phase bonded (LPB) porous SiC with neck bonding phases consisting of yttrium aluminate (Y4Al2O9, Y3Al5O12), yttrium silicate (Y2Si2O7), and Al2O3 were fabricated using varying amounts of an Al2O3Y2O3SiO2 bonding additive in Ar at 1500 °C for 1 h. LPB porous SiC ceramics exhibited unimodal pore-size distributions, porosities of 36.644.8%, and pore sizes of 7.78.5 μm. The particle-size distribution of SiC powders was an important factor in determining the pore characteristics, including pore-size distribution, pore shape, porosity, and pore size, and the flexural strength as well as the gas permeability of LPB porous SiC ceramics. The porosity and pore size increased, and the pore-size distribution narrowed by using SiC powders with a narrow size distribution. The flexural strength of porous SiC varied in the range of 39.766.7MPa and was mainly dependent on the porosity, pore shape, pore size, and solid boning area varied by the SiC particle-size distribution. A relatively high permeability (1.281.84 × 10-12m2) of LPB porous SiC was attained mainly due to the unimodal pore size distribution of pores with sizes of 7.78.5 μm.
AB - Liquid phase bonded (LPB) porous SiC with neck bonding phases consisting of yttrium aluminate (Y4Al2O9, Y3Al5O12), yttrium silicate (Y2Si2O7), and Al2O3 were fabricated using varying amounts of an Al2O3Y2O3SiO2 bonding additive in Ar at 1500 °C for 1 h. LPB porous SiC ceramics exhibited unimodal pore-size distributions, porosities of 36.644.8%, and pore sizes of 7.78.5 μm. The particle-size distribution of SiC powders was an important factor in determining the pore characteristics, including pore-size distribution, pore shape, porosity, and pore size, and the flexural strength as well as the gas permeability of LPB porous SiC ceramics. The porosity and pore size increased, and the pore-size distribution narrowed by using SiC powders with a narrow size distribution. The flexural strength of porous SiC varied in the range of 39.766.7MPa and was mainly dependent on the porosity, pore shape, pore size, and solid boning area varied by the SiC particle-size distribution. A relatively high permeability (1.281.84 × 10-12m2) of LPB porous SiC was attained mainly due to the unimodal pore size distribution of pores with sizes of 7.78.5 μm.
KW - Flexural strength
KW - Particle size distribution
KW - Permeability
KW - Porous SiC
KW - Reaction bonding
UR - http://www.scopus.com/inward/record.url?scp=85119494413&partnerID=8YFLogxK
U2 - 10.2109/jcersj2.21077
DO - 10.2109/jcersj2.21077
M3 - Article
AN - SCOPUS:85119494413
VL - 129
SP - 660
EP - 668
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
SN - 1882-0743
IS - 11
ER -