Synthesis, microstructure and mechanical properties of ZrB2 ceramic prepared by mechanical alloying and spark plasma sintering

Chun Feng Hu, Yoshio Sakka, Tetsuo Uchikoshi, Tohru S. Suzuki, Byung Koog Jang, Salvatore Grasso, Gustavo Suarez

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Dense bulk ZrB2 ceramic was synthesized by mechanical alloying (MA) and followed spark plasma sintering (SPS) using zirconium and boron as initial materials. It was found that MA process was effective to fragment the coarse metal zirconium particles from 45 μm to less than 1 ?m within 20 hours. In comparison with the commercial ZrB2 powder, the as-obtained zirconium and boron mixture powders showed higher sinterability. When the sintering was carried out at 1800°C, the relative density of synthesized ZrB2 samples using mixture powder was above 95%, higher than that of ZrB2 sample prepared using commercial powder (73%). Vickers hardness of those ZrB2 samples was at the same level of 15 GPa. However, the fracture toughness of ZrB2 samples seemed to depend on the heating rate of the SPS process. Corresponding to the heating rates of 10, 50, and 100°C/min, the fracture toughness of as-prepared ZrB2 samples were 3.83, 3.19, and 2.74 MPa·m1/2, respectively.

Original languageEnglish
Title of host publicationHigh-Performance Ceramics VI
PublisherTrans Tech Publications Ltd
Pages165-168
Number of pages4
ISBN (Print)0878492747, 9780878492749
DOIs
Publication statusPublished - Jan 1 2010
Externally publishedYes
Event6th China International Conference on High-Performance Ceramics, CICC-6 - Harbin, China
Duration: Aug 16 2009Aug 19 2009

Publication series

NameKey Engineering Materials
Volume434-435
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other6th China International Conference on High-Performance Ceramics, CICC-6
CountryChina
CityHarbin
Period8/16/098/19/09

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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