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Enhancing Uniformity in Flash Sintering Through High-Frequency Alternating Current - Role of Skin Effect
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Weiwei XIAO1, Yali YU2, Xiaofeng ZHAO3, Na NI1, 3
Journal of the Chinese Ceramic Society | 2023, 51(12) : 3077 - 3082
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Journal of the Chinese Ceramic Society | 2023, 51(12): 3077-3082
• Research Articles •
Enhancing Uniformity in Flash Sintering Through High-Frequency Alternating Current - Role of Skin Effect
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Weiwei XIAO1, Yali YU2, Xiaofeng ZHAO3, Na NI1, 3
Affiliations
  • 1.School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2.State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • 3.Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

    • XIAO Weiwei (1990-), male, Doctorial Candidate. E-mail:

About Author:

XIAO Weiwei (1990-), male, Doctorial Candidate. E-mail:

Published: 2023-09-11 doi: 10.14062/j.issn.0454-5648.20230362
Outline
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Flash sintering is extensively investigated for over a decade since its discovery, but its practical application is seldomly discussed. A primary challenge in utilizing flash sintering is a difficulty in sintering large samples. This is since in a typical direct current (DC) flash sintering, the current is concentrated primarily in the center of the sample, causing a significant temperature gradient between the interior and surface of the sample, thus leading to an inhomogeneous microstructure in the final product and sometimes large stresses in the sample that breaks the material. In this paper, we utilized the alternating current (AC) with varying frequencies to investigate its effect on this inhomogeneity issue in flash sintering. The results indicate that increasing the frequency significantly enhances the uniformity of the sample. The underlying mechanism is related to a significant "skin effect" in AC flash sintering, where the current density is concentrated on the surface of the sample rather than its center, compensating for a higher radiation heat loss at the surface and resulting in a more uniform sample temperature. This work provides a potential approach to enhance the flash sintering for industrial applications.

alternating current flash sintering  /  microstructure homogeneity  /  skin effect
肖巍伟, 余亚丽, 赵晓峰, 倪娜. 利用高频交流电提高闪烧均匀性：趋肤效应的作用. 硅酸盐学报, 2023 , 51 (12) : 3077 -3082 . DOI: 10.14062/j.issn.0454-5648.20230362
Weiwei XIAO, Yali YU, Xiaofeng ZHAO, Na NI. Enhancing Uniformity in Flash Sintering Through High-Frequency Alternating Current - Role of Skin Effect[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (12) : 3077 -3082 . DOI: 10.14062/j.issn.0454-5648.20230362
Appendix
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Year 2023 volume 51 Issue 12
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Article Info
doi: 10.14062/j.issn.0454-5648.20230362
  • Receive Date：2023-05-22
  • Online Date：2026-10-19
  • Published：2023-09-11
Article Data
Affiliations
History
  • Received：2023-05-22
  • Revised：2023-06-14
Funding
Affiliations
    1.School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2.State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
    3.Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding:

NI Na (1977-), female, Ph.D., Associate 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
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Percentage of
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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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