Low temperature fabrication of highly dense α‐Si<sub>3</sub>N<sub>4</sub> ceramics-Reference-Cited by-同舟云学术

Low temperature fabrication of highly dense α‐Si₃N₄ ceramics

Published:2024-03-28 Issue:7 Volume:107 Page:4494-4500
ISSN:0002-7820
Container-title:Journal of the American Ceramic Society
language:en
Short-container-title:J Am Ceram Soc.

Author:

Du Songmo¹^ORCID,Zhang Jie²^ORCID,Li Fei¹^ORCID,Chen Zhanglin¹^ORCID,Zhang Shijia¹^ORCID,Zhao Shuo¹^ORCID,Zhao Dengke¹,Fan Binbin¹,Chen Kexin¹,Liu Guanghua¹^ORCID

Affiliation:

1. State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing China

2. Advanced Ceramics and Structures Center Yongjiang Laboratory Ningbo City Zhejiang Province China

Abstract

AbstractHighly dense α‐silicon nitride (Si3N4) ceramics were densified at a lower temperature of 1450°C under a moderate mechanical pressure of 50 MPa from commercial α‐Si3N4 powder and with conventional Al2O3–Y2O3 sintering additives. The fabricated α‐Si3N4 ceramics exhibited a hardness of 19 GPa, which is higher than that of the β‐Si3N4 ceramics usually obtained. The effect of sintering temperature and sintering pressure in the liquid phase sintering of the α‐Si3N4 ceramics is studied. The role of the dissolution–reprecipitation process and the particle rearrangement during densification of the α‐Si3N4 ceramics is discussed.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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