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Mechanical Properties of Boron Nitride Nanosheets (BNNSs) Reinforced Si3N4 Composites

  • Guandong Liang
  • Jianqiang BiEmail author
  • Guoxun Sun
  • Yafei Chen
  • Weili Wang
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

The boron nitride nanosheets (BNNSs)/silicon nitride (Si3N4) composite ceramics were prepared by SPS sintering. BNNSs with few layers and transverse size in micron-scale were prepared by ball-milling and ultrasound-assisted liquid-phase stripping. In this work, it was found that the BNNSs prepared by these two methods could enhance the mechanical properties of silicon nitride ceramics, and of BNNSs/Si3N4 composite ceramics exhibit better bending strength when adding the ultrasound-assisted liquid-phase stripping BNNSs. The bending strength and fracture toughness of BNNSs/Si3N4 composite ceramics was increased by 36% and 51%, respectively, when 2 wt% BNNSs prepared by ball-milling method were added. The pullout of BNNSs, the bridging of cracks, and the deflection of cracks are the main factors of improving the toughness.

Keywords

Boron nitride nanosheets BNNSs/Si3N4 composite ceramics Mechanical properties 

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Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Guandong Liang
    • 1
    • 2
  • Jianqiang Bi
    • 1
    • 2
    Email author
  • Guoxun Sun
    • 1
    • 2
  • Yafei Chen
    • 1
    • 2
  • Weili Wang
    • 1
    • 2
  1. 1.Key Laboratory for Liquid–Solid Structure Evolution and Processing of MaterialsMinistry of Education, Shandong UniversityJinanChina
  2. 2.Engineering Ceramics Key Laboratory of Shandong ProvinceShandong UniversityJinanChina

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