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Reinforced Si3N4 Ceramic Foam with Dense Outer Shell
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Feiyue YANG, Shuang ZHAO, Zichun YANG, Guobing CHEN, Shuowei YUAN
Journal of the Chinese Ceramic Society | 2020, 48(3) : 362 - 367
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Journal of the Chinese Ceramic Society | 2020, 48(3): 362-367
Reinforced Si3N4 Ceramic Foam with Dense Outer Shell
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Feiyue YANG, Shuang ZHAO, Zichun YANG, Guobing CHEN, Shuowei YUAN
Affiliations
  • School of Power Engineering, Naval University of Engineering, Wuhan 430032, China

    • YANG Feiyue (1994-), male, Master candidate. E-mail:

About Author:

YANG Feiyue (1994-), male, Master candidate. E-mail:

Published: 2020-03-20 doi: 10.14062/j.issn.0454-5648.20190385
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A Si3N4 ceramic foam having a shell with the thickness of 500 μm and the thickest portion of 693 μm was prepared by a reaction sintering method with a pre-embedding powder. The shell sintered at 1 400 ℃ for 6 h appears a staggered crystal columnar structure. The length of the crystal column in the shell increases slightly when the nitriding temperature is 1 450 ℃. Prolonging the nitriding time to 10 h can transform the microstructure of shell into a coarse crystalline column structure, thus reducing an aspect ratio of the crystal column. The shell has a ceramic foam with a certain degree of elasticity (i.e., Young's modulus of elasticity is 117-352 MPa), and increases the compressive strength of the sample by 47%. In addition, the presence of shell has little effect on the porosity, density and thermal conductivity of ceramic foam.

silicon nitride foam ceramics  /  outer shell  /  crystal morphology  /  compressive strength
杨飞跃, 赵爽, 杨自春, 陈国兵, 袁硕伟. 致密外壳整体增强Si3N4泡沫陶瓷的制备及性能. 硅酸盐学报, 2020 , 48 (3) : 362 -367 . DOI: 10.14062/j.issn.0454-5648.20190385
Feiyue YANG, Shuang ZHAO, Zichun YANG, Guobing CHEN, Shuowei YUAN. Reinforced Si3N4 Ceramic Foam with Dense Outer Shell[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (3) : 362 -367 . DOI: 10.14062/j.issn.0454-5648.20190385
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Year 2020 volume 48 Issue 3
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Article Info
doi: 10.14062/j.issn.0454-5648.20190385
  • Receive Date：2019-06-06
  • Online Date：2026-10-29
  • Published：2020-03-20
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History
  • Received：2019-06-06
  • Revised：2019-06-23
Funding
Affiliations
    School of Power Engineering, Naval University of Engineering, Wuhan 430032, China

Corresponding:

YANG Zichun (1967-), 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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