Journal of Inorganic Materials, Volume. 37, Issue 8, 853(2022)
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![Optical picture (a) and amplified microstructures (b-d) of the porous Si3N4 ceramics prepared by gel-casting and SHS[32]](/Images/icon/loading.gif){kind=icon}
1. Optical picture (a) and amplified microstructures (b-d) of the porous Si3N4 ceramics prepared by gel-casting and SHS[32]
2. Schematic illustration of the fabrication of porous Si3N4 ceramics by SHS[47]
3. Microstructures of the porous Si3N4 ceramics fabricated by different (p ) pressures of N2 gas (p ) and average particle sizes of Si powder (d 50)[46]
4. Schematic of the formation mechanism of porous Si3N4 starting from Si with different particle sizes[46]
5. Microstructures of different areas of the SHS-fabricated Si3N4 ceramics[59]
6. Weibull plots of flexural strength for samples prepared with different types of Si3N4 diluent and shaping pressures[59]
7. Relationship between flexural strength and porosity of ceramics prepared by different methods
8. Room-temperature and high-temperature flexural strength of the fabricated porous Si3N4 ceramics with different sintering additives[56]
9. Stress-strain curves of the obtained porous Si3N4 ceramics during fracture at 1400 ℃[56]
10. Microstructures and average grain sizes of the SHS-fabricated Si3N4 ceramics prepared with different Y2O3 mass content as sintering additive[62]
11. Room-temperature and high-temperature flexural strength of the fabricated porous Si3N4 ceramics as function of sintering additives addition[62]
Table 1. Composition of raw materials, parameters of SHS process and properties of the fabricated samples
View tableView in ArticleTable 1. Composition of raw materials, parameters of SHS process and properties of the fabricated samples
Si/g Si3N4/g Y2O3/g Combustion temperature/℃ Reaction time/s Open porosity/% Shrinkage/% Ref. 30-45 70-55 2 1870-2050 30-13 40.5-45.8 / [ 47 ]30-70 70-30 5 1820-1982 / 50.0-60.0 2.8-3.4 [ 48 ]
Table 2. Correlation coefficient and Weibull modulus of samples obtained with two different Si3N4 powders and varied shaping pressures[59]
View tableView in ArticleTable 2. Correlation coefficient and Weibull modulus of samples obtained with two different Si3N4 powders and varied shaping pressures[59]
SA-50 SA-100 SA-150 SA-200 ST-50 ST-100 ST-150 ST-200 Ref.[ 63 -64 ]R2 0.99 0.96 0.99 0.97 0.96 0.90 0.96 0.99 - m 11.4 9.3 8.8 5.7 11.4 16.0 17.2 11.0 10.6-20.9
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Ye ZHANG, Yuping ZENG.
Paper Information
Category: REVIEW
Received: Jan. 13, 2022
Accepted: --
Published Online: Jan. 10, 2023
The Author Email: ZENG Yuping (yuping-zeng@mail.sic.ac.cn)
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