广西师范大学学报（自然科学版） ›› 2010, Vol. 28 ›› Issue (3): 46-50.

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低温烧结α/β Si3N4复相陶瓷及力学性能研究

梁振华1, 彭桂花1, 冯玉芝1, 李庆余1, 刘茜2, 李文兰2   

  1. 1.广西师范大学化学化工学院药用资源化学与药物分子工程教育部重点实验室,广西桂林541004;
    2.中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海200050
  • 收稿日期:2010-01-27 出版日期:2010-09-20 发布日期:2023-02-06
  • 通讯作者: 彭桂花(1979—),女,湖北钟祥人,广西师范大学教授,博士。E-mail:pengguihua@mail.sic.ac.cn
  • 基金资助:
    国家自然科学基金资助项目(50962003);广西科学研究与技术开发计划应用基础研究专项基金资助项目(桂科基0731007);高性能陶瓷和超微结构国家重点实验室开放基金资助项目(SKL200707SIC)

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

摘要： 以MgSiN2为烧结助剂,在1 600～1 750 °C下,热压烧结制备α/β Si3N4复相陶瓷,并研究其力学性能与相组成及显微结构之间的关系。结果表明,显微硬度随α-Si3N4质量分数的增加而增加,α-Si3N4质量分数为60%时,显微硬度达到最大,随α-Si3N4质量分数继续增加,显微硬度变化很小,约为23 GPa。随着β-Si3N4质量分数的增加,断裂韧性先增加后又下降,抗弯强度先增加而后变化不大。

关键词: Si3N4, 陶瓷, 低温烧结, 力学性能, MgSiN2

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

中图分类号: 

  • TQ174
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