动态热锻制备高性能织构Si<sub>3</sub>N<sub>4</sub>陶瓷

doi:10.19976/j.cnki.43-1448/TF.2025028

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Abstract Si₃N₄ ceramics exhibit excellent mechanical properties due to their strong covalent bonding characteristics, however, this characteristic makes them difficult to secondary process, severely limiting their widespread industrial applications. In this study, dynamic hot forging (DHF) technology was employed to process commercial Si₃N₄ ceramics, the effects of hot forging temperature on the microstructure and mechanical properties of materials were studied. The results indicate that under a dynamic pressure of (60±5) MPa and a hot forging temperature of 1 800 ℃, the Si₃N₄ ceramics exhibit optimal mechanical properties, with a hardness of 13.84 GPa, a fracture toughness of 6.88 MPa·m^1/2, and a bending strength reaching 925 MPa. All performance metrics significantly surpassing those of the original samples. This performance enhancement is primarily attributed to two key factors: firstly, the elimination of defects such as pores during the hot forging process, and secondly, the structural texturing effect induced by dynamic pressure. The DHF technology developed in this study provides an effective new method for the secondary processing and strengthening of high-performance difficult-to-machine ceramic materials.

Key words： hot forging dynamic pressure silicon nitride texturing mechanical property

Received: 21 March 2025 Published: 27 November 2025

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	Articles by authors
	DU Xuanhao
	YAO Shu
	FAN Jianye
	GUO Huimin
	CAI Silong
	ZHAO Yulong
	ZHAO Ke
	LIU Jinling
	LIU Dianguang

Cite this article:

DU Xuanhao,YAO Shu,FAN Jianye, et al. Dynamic hot forging preparation of textured Si₃N₄ ceramics with high performance[J]. Materials Science and Engineering of Powder Metallurgy, 2025, 30(5): 424-432.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2025028 OR http://pmbjb.csu.edu.cn/EN/Y2025/V30/I5/424

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