电场辅助动态热锻制备超高韧3YSZ陶瓷

doi:10.19976/j.cnki.43-1448/TF.2024032

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Abstract The inherent brittleness greatly limits the wide application of high performance ceramic materials in the industrial field. In this paper, ultrahigh toughness 3YSZ ceramics were prepared by electric field assisted dynamic hot forging. The microstructure evolution and mechanical properties of 3YSZ ceramics under the coupling of electric field and dynamic force field were studied. The results show that: under the conditions hot forging for 10 min at a constant furnace temperature of 1 000 ℃, electric field strength of 20 V/cm, current density of 140 mA/mm², and dynamic pressure of (50±10) MPa, the Vickers hardness and fracture toughness of 3YSZ ceramic reache (12.40±0.58) GPa and (10.69±0.33) MPa·m^1/2, respectively, which increase 11.5% and 54.9% compared with the conventional sintered ceramic. The remarkable improvement of toughness mainly due to the stability of the tetragonal phase in 3YSZ ceramics reduced by electric field assisted dynamic hot forging, which makes it easier to undergo phase transformation when induced by external force, so as to effectively inhibit crack propagation. Electric field assisted dynamic hot forging technology has the advantages of no need to add reinforcement phase and remarkable toughening effect, which provides a new path for toughening high performance 3YSZ ceramic materials.

Key words： electric field dynamic hot forging zirconia toughness transformation toughening

Received: 04 April 2024 Published: 30 September 2024

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	ZHANG Botao
	YAO Shu
	FAN Jianye
	ZHAO Ke
	LIU Jinling
	LIU Dianguang

Cite this article:

ZHANG Botao,YAO Shu,FAN Jianye, et al. Electric field assisted dynamic hot forging preparation of 3YSZ ceramic with ultrahigh toughness[J]. Materials Science and Engineering of Powder Metallurgy, 2024, 29(4): 290-297.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2024032 OR http://pmbjb.csu.edu.cn/EN/Y2024/V29/I4/290

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