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

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

3 被引用数 (Scopus)

抄録

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.

本文言語英語
ホスト出版物のタイトルHigh-Performance Ceramics VI
出版社Trans Tech Publications Ltd
ページ165-168
ページ数4
ISBN(印刷版)0878492747, 9780878492749
DOI
出版ステータス出版済み - 1 1 2010
外部発表はい
イベント6th China International Conference on High-Performance Ceramics, CICC-6 - Harbin, 中国
継続期間: 8 16 20098 19 2009

出版物シリーズ

名前Key Engineering Materials
434-435
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

その他

その他6th China International Conference on High-Performance Ceramics, CICC-6
国/地域中国
CityHarbin
Period8/16/098/19/09

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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