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Microstructure and Mechanical Properties of Silicon Nitride Ceramics Sintered by Oscillatory Pressure Sintering
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Xiaowei QIN1, 4, Liwen Sheng2, Shuang LI3, Zhipeng XIE4
Journal of the Chinese Ceramic Society | 2020, 48(6) : 803 - 809
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Journal of the Chinese Ceramic Society | 2020, 48(6): 803-809
• Special Topic on Engineering Ceramic Materials •
Microstructure and Mechanical Properties of Silicon Nitride Ceramics Sintered by Oscillatory Pressure Sintering
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Xiaowei QIN1, 4, Liwen Sheng2, Shuang LI3, Zhipeng XIE4
Affiliations
  • 1.School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333000, Jiangxi, China
  • 2.Zhuzhou Wanrong New Material Technology Co Ltd, Zhuzhou 412000, Hunan, China
  • 3.School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, Shandong, China
  • 4.School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

    • Qin Xiaowei (1990-), male, Master candidate. E-mail:

About Author:

Qin Xiaowei (1990-), male, Master candidate. E-mail:

Published: 2020-06-20 doi: 10.14062/j.issn.0454-5648.2020.06.20190712
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Si3N4 ceramics were prepared by an oscillating pressure sintering technique when Al2O3, Y2O3 and TiC additives were introduced into Si3N4 powders. The microstructure, grain size and mechanical properties of silicon nitride ceramics at different temperatures (i.e., 1 700, 1 725, 1 750 and 1 775 ℃) were analyzed. The effect of TiC additive on the particle densification and interface bonding of the ceramics were discussed. The results show that Si3N4 ceramics can be fully densified at 1 725 ℃ in the oscillating pressure sintering process, thus obtaining a high bending strength of (1 421±59) MPa and the Vickers hardness of (16.1±0.3) GPa, respectively. The aspect ratio of the sample also firstly increases and then decreases with the increase of temperature, and the maximum grain aspect ratio reaches at 1 725 ℃. The aspect ratio decreases and the grains become coarser when the temperature further increases to 1 775 ℃. The flexural strength and the Vickers hardness of silicon nitride decrease with the decrease of length-diameter ratio when the temperature higher than1 725 ℃.

silicon nitride ceramic  /  oscillating pressure  /  grain aspect ratio  /  flexure strength
秦笑威, 盛利文, 李双, 谢志鹏. 振荡压力烧结氮化硅陶瓷微观形貌及其力学性能. 硅酸盐学报, 2020 , 48 (6) : 803 -809 . DOI: 10.14062/j.issn.0454-5648.2020.06.20190712
Xiaowei QIN, Liwen Sheng, Shuang LI, Zhipeng XIE. Microstructure and Mechanical Properties of Silicon Nitride Ceramics Sintered by Oscillatory Pressure Sintering[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (6) : 803 -809 . DOI: 10.14062/j.issn.0454-5648.2020.06.20190712
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Year 2020 volume 48 Issue 6
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Article Info
doi: 10.14062/j.issn.0454-5648.2020.06.20190712
  • Receive Date：2019-10-29
  • Online Date：2026-10-29
  • Published：2020-06-20
Article Data
Affiliations
History
  • Received：2019-10-29
  • Revised：2019-11-18
Funding
Affiliations
    1.School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333000, Jiangxi, China
    2.Zhuzhou Wanrong New Material Technology Co Ltd, Zhuzhou 412000, Hunan, China
    3.School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, Shandong, China
    4.School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Corresponding:

XIE Zhipeng (1957-), male, Professor. E-mail:
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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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