Absorption properties of twinned SiC nanowires reinforced Si3N4 composites fabricated by 3D-prining

Wenyan Duan, Xiaowei Yin, Fangxian Cao, Yinglu Jia, Yun Xie, Peter Greil, Nahum Travitzky

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

Near net- and complex shaped porous silicon nitride (Si3N4) composites reinforced with in-situ formed twinned silicon carbide (SiC) nanowires (NWs) were successfully fabricated by 3D-printing (3DP) followed by polymer precursor infiltration and pyrolysis (PIP) up to 1400 °C. An increase of the PIP cycle number of the printed bodies resulted in a homogeneous distribution of SiC NWs in the fabricated composites. An increase of SiC NW content in the fabricated composites led to the growth of both the real and the imaginary parts of permittivity. The formation of twinned SiC NWs with high electrical conductivity led to a minimal electromagnetic wave RC of -57 dB, demonstrating that Si3N4-SiC ceramics with the in-situ formed SiC NWs have a superior microwave absorbing ability.

Original languageEnglish
Pages (from-to)257-260
Number of pages4
JournalMaterials Letters
Volume159
DOIs
Publication statusPublished - 13 Jul 2015

Keywords

  • 3D-printing
  • Absorption properties
  • PIP
  • SiN-SiC

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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