Reactive sintering of tungsten-doped high strength ZrB2-SiC porous ceramics using metastable precursors

Bin Zhao, Yanshan Jiang, Biyun Yang, Tingyu Wang, Yongzhen Hu, Dongfeng Sun, Ruixing Li, Shu Yin, Junping Li, Zhihai Feng, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Tungsten-doped porous ZrB2-20 vol.% SiC specimens with a high strength skeleton were fabricated by reactive sintering using metastable reactants, i.e., as-synthesized amorphous hydrous ZrO2-WO 3/ZrO2, amorphous boron, nanocarbon, and β-SiC. Doping with tungsten clearly promoted sintering and improved mechanical properties; the optimum tungsten concentration to obtain high mechanical properties was investigated. A single-phase solid solution (Zr,W)B2 was formed in the specimens with tungsten. We suggest that sintering was promoted by self-accelerated diffusion owing to the formation of point defects caused by doping with tungsten. The improvement of mechanical properties could be attributed to solid solution strengthening.

Original languageEnglish
Pages (from-to)19-23
Number of pages5
JournalMaterials Research Bulletin
Volume51
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • A. Amorphous materials
  • A. Ceramics
  • A. Microporous materials
  • D. Defects
  • D. Mechanical properties

ASJC Scopus subject areas

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

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