Influence of TiN addition on densification behavior and mechanical properties of ZrB2 ceramics

  • Alain Shima Department of Aeronautical Engineering, University of Kyrenia, Kyrenia, Cyprus
  • Masoud Kazemi Ceramic Department, Materials and Energy Research Center (MERC), Karaj, Iran

Abstract

In the present work, densification behavior and mechanical features (fracture toughness and Vickers hardness) of undoped and TiN-doped ZrB2 ceramic materials, hot-pressed at 1800 ºC under 15 MPa for 1 hr, were studied. The addition of only 5 wt% TiN into ZrB2 has resulted in an increase in its relative density from 83% to 90 %. Removal of oxide contaminations like B2O3 via chemical reactions with TiN and new secondary phases formation such as ZrN, h-BN, and (Zr,Ti)B2 solid solutions were approved employing crystalline phase analysis and microstructural studies. Improvement of densification and restriction of grain growth caused enhancement of mechanical characteristics. The measured values of Vickers hardness and fracture toughness are ameliorated from 7.8 GPa and 1.5 MPa.m1/2 to 14.1 GPa and 3.8 MPa.m1/2, respectively.

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Keywords: ZrB2, TiN, Densification, Sinterability, Mechanical properties
Influence of TiN addition on densification behavior and mechanical properties of ZrB2 ceramics
Submitted
2022-12-04
Published
2023-03-30
How to Cite
Shima, A., & Kazemi, M. (2023). Influence of TiN addition on densification behavior and mechanical properties of ZrB2 ceramics. Synthesis and Sintering, 3(1), 46-53. https://doi.org/10.53063/synsint.2023.31133
Section
Articles