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High-temperature Mechanical Properties of Si3N4 Composite Ceramics Prepared by Freeze Gelation
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Juanli YU, Zheng YANG, Jian ZHANG, Tianxiang ZHANG, Yuchen PEI
Journal of the Chinese Ceramic Society | 2021, 49(7) : 1439 - 1445
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Journal of the Chinese Ceramic Society | 2021, 49(7): 1439-1445
• Research Article •
High-temperature Mechanical Properties of Si3N4 Composite Ceramics Prepared by Freeze Gelation
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Juanli YU, Zheng YANG, Jian ZHANG, Tianxiang ZHANG, Yuchen PEI
Affiliations
  • Research Institute of Aerospace Special Materials and Technology, Beijing 100074, China

    • YU Juanli (1978-), Female, Ph.D., Associate Professor. E-mail:

About Author:

YU Juanli (1978-), Female, Ph.D., Associate Professor. E-mail:

Published: 2021-07-20 doi: 10.14062/j.issn.0454-5648.20200802
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Si3N4/BaAl2Si2O8(BAS) composite ceramics were prepared by a novel freeze gelation method. The flexural strength, flexural modulus, flexural fracture and microstructures of Si3N4/BAS composite ceramics were investigated at different temperatures (i.e., 25-1 400℃) and BAS contents (i.e., 7.5%-40.0%, in mass fraction). The results show that the high-temperature mechanical properties of Si3N4/BAS composite ceramics can be improved via the increasing of BAS content. At 1 400℃ and 40% BAS, the flexural strength and flexural modulus of Si3N4/BAS composite ceramics are 241 MPa and 92 GPa, respectively. At 25-1 400℃ and 30%-40% BAS, Si3N4/BAS composite ceramics become a rigid fracture mode, and the sintered body is mainly composed of β-Si3N4 and BAS without Si2N2O. In air, the testing samples show a surface oxidation phenomenon at 1 500℃, but the samples are not oxidized at <1 400℃.

freeze-gelation  /  silicon nitride  /  celsian  /  fracture mode
余娟丽, 杨铮, 张剑, 张天翔, 裴雨辰. 冷冻胶凝成型制备Si3N4复相陶瓷材料的高温力学特性. 硅酸盐学报, 2021 , 49 (7) : 1439 -1445 . DOI: 10.14062/j.issn.0454-5648.20200802
Juanli YU, Zheng YANG, Jian ZHANG, Tianxiang ZHANG, Yuchen PEI. High-temperature Mechanical Properties of Si3N4 Composite Ceramics Prepared by Freeze Gelation[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (7) : 1439 -1445 . DOI: 10.14062/j.issn.0454-5648.20200802
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Year 2021 volume 49 Issue 7
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Article Info
doi: 10.14062/j.issn.0454-5648.20200802
  • Receive Date：2020-10-24
  • Online Date：2026-10-30
  • Published：2021-07-20
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  • Received：2020-10-24
  • Revised：2020-11-29
Affiliations
    Research Institute of Aerospace Special Materials and Technology, Beijing 100074, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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