Journal of Guangxi Normal University(Natural Science Edition) ›› 2010, Vol. 28 ›› Issue (3): 46-50.

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Fabrication of α/β Si3N4 Composites at Low Temperature and Its Mechanical Properties

LIANG Zhen-hua1, PENG Gui-hua1, FENG Yu-zhi1, LI Qing-yu1, LIU Qian2, LI Wen-lan2   

  1. 1. Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources of Ministry of Education of China,College of Chemistry and Chemical Engineering,Guangxi Normal University,Guilin Guangxi 541004,China;
    2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics, Chinese Academy of Sciences,Shanghai 200050,China
  • Received:2010-01-27 Online:2010-09-20 Published:2023-02-06

Abstract: α/β Si3N4 composites were sintered by hot pressing at 1 600~1 750 °C using MgSiN2 as additives,and the relationship between mechanical properties and phase composition,microstructure was investigated.Microhardness increased with the increase of the content of α-Si3N4,achieved the highest valuewhen the content of α-Si3N4 is about 60%,and tended to a steady value (about 23 GPa) with further increase of the content of α-Si3N4.With the increaseof the content of β-Si3N4,fracture toughness increased and then decreased,and strength increased first and then had little change.

Key words: Si3N4, ceramic, sinter at low temperature, mechanical properties, MgSiN2

CLC Number: 

  • TQ174
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