Journal of Inorganic Materials, Volume. 37, Issue 12, 1275(2022)
Effect of Pore Structure of Organic Resin-based Porous Carbon on Joining Properties of Cf/SiC Composites
Figures & Tables(11)
. Microstructures of joints with different volumn densities ((a) 0.51, (b) 0.70, (b) 0.90) and (d) flexural strengths of the joined specimens
. Morphologies of the polished surfaces before and after HF-HNO3 corrosion of RBSC fabricated from preforms with different pore sizes
. XRD patterns of the RBSC fabricated from preforms with different pore sizes
. Surface microstructures after HF-HNO3 corrosion of joining samples with different pore sizes
. (a) Schematic of the action of inert filler and (b) volume shrinkage and porosity change curves of porous carbon blanks
. Microstructures of the joint with different contents of inert filler ((a) 30%; (b) 40%; (c) 50%; (d) 55%, in mass) and (e) partial enlargement of (d)
. Flexural strength of the joined samples with different contents of inert filler
Table 1. Composition of resin solution and properties of porous carbons after pyrolysis
View tableView in ArticleTable 1. Composition of resin solution and properties of porous carbons after pyrolysis
Sample PF/% EG/% Pore former* Residual carbon**/% Average pore size/nm Bulk density/(g·cm-3) 1 50 50 FeCl2 (1%) 23+1.1 190±15 0.73±0.01 2 50 50 H3BO3 (1.5%) 24.3±0.9 642±15 0.74±0.01 3 50 50 FeCl2 (1%) + H3BO3 (1.5%) 24.1±1.7 1226±48 0.74±0.03 4 50 50 H3BO3 (2.5%) 25.8±2.1 1552±38 0.79±0.03 5 50 50 H3BO3 (3.5%) 26.7±1.5 2363±54 0.79±0.03
Table 2. Properties of the RBSC fabricated from preforms with different pore sizes
View tableView in ArticleTable 2. Properties of the RBSC fabricated from preforms with different pore sizes
Pore size/nm Open porosity/% Density/ (g·cm-3) Flexural strength/MPa Residual Si/(%, in volume) 190 0.97 2.93 296±28 16 642 1.26 2.91 268±46 14 1226 1.87 2.88 248±22 16 1552 3.51 2.81 238±44 12 2363 18.76 2.10 115±32 13
Table 3. Properties of joining samples with different pore sizes
View tableView in ArticleTable 3. Properties of joining samples with different pore sizes
Pore size/nm Flexural strength/MPa Strength retention/% 14 90±28 61 190 125±12 85 316 77±10 52 642 107±15 73 1226 65±22 44
Table 4. Composition of resin-based slurry
View tableView in ArticleTable 4. Composition of resin-based slurry
Sample PF/ % EG/ % Dispersant*/% Pore former** (FeCl2)/% α-SiC powder/% 1 40 40 4 1 20 2 35 35 4 1 30 3 30 30 4 1 40 4 25 25 4 1 50 5 22.5 22.5 4 1 55
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Xishi WU, Yunzhou ZHU, Qing HUANG, Zhengren HUANG. Effect of Pore Structure of Organic Resin-based Porous Carbon on Joining Properties of Cf/SiC Composites[J]. Journal of Inorganic Materials, 2022, 37(12): 1275
Paper Information
Category: EDITORIAL
Received: May. 25, 2022
Accepted: --
Published Online: Jan. 12, 2023
The Author Email: WU Xishi (wuxishi@nimte.ac.cn)
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