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Effect of TiN Source on Microstructures and Mechanical Properties of Hot-pressed Si3N4-TiN Ceramics
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Wanxin WEI, Junjie YU, Weijian LIU, Weiming GUO, Huatay LIN
Journal of the Chinese Ceramic Society | 2020, 48(3) : 375 - 380
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Journal of the Chinese Ceramic Society | 2020, 48(3): 375-380
Effect of TiN Source on Microstructures and Mechanical Properties of Hot-pressed Si3N4-TiN Ceramics
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Wanxin WEI, Junjie YU, Weijian LIU, Weiming GUO, Huatay LIN
Affiliations
  • School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China

    • WEI Wanxin (1994-), male, Master candidate. E-mail:

About Author:

WEI Wanxin (1994-), male, Master candidate. E-mail:

Published: 2020-03-20 doi: 10.14062/j.issn.0454-5648.20190421
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The effect of TiN source (i.e., TiN powder, TiO2 powder and TiO2 sol) on the phase compositions, microstructures and mechanical properties of hot-pressed Si3N4-TiN ceramics was investigated. The results show that only β-Si3N4 and TiN phases are detected for the sample with TiN powder. The sizes of β-Si3N4 and TiN grains are large, the Vickers hardness, flexure strength, and fracture toughness are (15.6±0.3) GPa, (1 058±78) MPa, and (11.2±0.6) MPa·m1/2, respectively. However, the O′-Sialon phase appears in the sample with TiO2 powder in addition to β-Si3N4 and TiN phases, and the content of O′-Sialon is 8.7wt%. Due to the relatively fine grains of β-Si3N4 and TiN, the Vickers hardness increases to (16.7±0.4) GPa, and the flexure strength and fracture toughness are (986±76) MPa and (11.3±0.4) MPa·m1/2, respectively. Moreover, the O′-Sialon phase appears in the sample with TiO2 sol, the content of O′-Sialon is 12.5wt%, and the size of β-Si3N4 and TiN grains is finer, having a higher Vickers hardness (i.e., 16.6±0.5 GPa), and relatively lower flexure strength (i.e., 788±94 MPa) and fracture toughness (i.e., 10.2±1.0 MPa·m1/2). Si3N4-TiN ceramics with uniformly fine microstructures and good mechanical properties can be thus obtained with TiO2 powder.

silicon nitride ceramics  /  titanium nitride sources  /  phase compositions  /  microstructures  /  mechanical properties
魏万鑫, 于俊杰, 刘伟键, 郭伟明, 林华泰. TiN对热压烧结Si3N4-TiN复相陶瓷显微结构和力学性能的影响. 硅酸盐学报, 2020 , 48 (3) : 375 -380 . DOI: 10.14062/j.issn.0454-5648.20190421
Wanxin WEI, Junjie YU, Weijian LIU, Weiming GUO, Huatay LIN. Effect of TiN Source on Microstructures and Mechanical Properties of Hot-pressed Si3N4-TiN Ceramics[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (3) : 375 -380 . DOI: 10.14062/j.issn.0454-5648.20190421
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Year 2020 volume 48 Issue 3
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Article Info
doi: 10.14062/j.issn.0454-5648.20190421
  • Receive Date：2019-06-21
  • Online Date：2026-10-29
  • Published：2020-03-20
Article Data
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History
  • Received：2019-06-21
  • Revised：2019-07-07
Funding
Affiliations
    School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China

Corresponding:

GUO Weiming (1982-), male, Ph.D., 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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