Nanocarbon-dependent synthesis of ZrB2 in a binary ZrO 2 and boron system

Ruixing Li, Haijie Lou, Shu Yin, Yun Zhang, Yanshan Jiang, Bin Zhao, Junping Li, Zhihai Feng, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Thermodynamically, ZrO2 may react with boron to form B 2O3/B2O2 and ZrB2 at room temperature. However, this reaction is incomplete at temperatures lower than 1550 °C, even with the use of metastable reactants, i.e., as-synthesized amorphous hydrous nano-ZrO2 and amorphous boron powders. In this study, a complete disintegration of ZrO2 was achieved by introducing nanocarbon to the binary system of ZrO2 and boron at 1550 °C. The metastable reactants affected the temperature required for the solid-state reactions and also strongly affected the kinetics of the transformation. Single crystal and plate-like ZrB2 particles with a uniform distribution and a size of ca. 1.0 μm in two-dimensions were obtained using 5 wt.% nanocarbon and a B/Zr molar ratio of 4.

Original languageEnglish
Pages (from-to)8581-8583
Number of pages3
JournalJournal of Alloys and Compounds
Volume509
Issue number34
DOIs
Publication statusPublished - 2011 Aug 25

Keywords

  • Amorphous materials
  • Ceramics
  • Nanoparticles
  • Nanosize
  • Powder technology

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Nanocarbon-dependent synthesis of ZrB<sub>2</sub> in a binary ZrO <sub>2</sub> and boron system'. Together they form a unique fingerprint.

Cite this