ZrB2-ZrCxN1-x Eutectic Composites Produced by Melt Solidification

Eric Jianfeng Cheng, Hirokazu Katsui, Takashi Goto

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Ceramic eutectics are naturally occurring in-situ composites and can offer superior mechanical properties. Here, ZrB2-ZrCxN1-x quasi-binary ceramic eutectic composites were produced by arc-melting a mixture of ZrB2, ZrC, and ZrN powders in an N2 atmosphere. The arc-melted ZrB2-ZrCxN1-x composites containing 50 mol% of ZrB2 (irrespective of the ZrC/ZrN ratio) showed rod-like eutectic structures, where ZrCxN1-x single-crystalline rods were dispersed in the ZrB2 single-crystalline matrices. Multiple orientation relationships between the ZrCxN1-x rods and the ZrB2 matrices were observed, and one was determined as ZrB2 {} //ZrxN1-x {111} and ZrB2 < > //ZrCxN1-x < >. The rod-like eutectic composites had higher hardness than the hypo- and hypereutectic composites and the 50ZrB2-40ZrC-10ZrN (mol%) eutectic composite showed the highest Vickers hardness (Hv) of 19 GPa.

Original languageEnglish
Pages (from-to)667-673
Number of pages7
JournalJournal of the American Ceramic Society
Issue number2
Publication statusPublished - 2016 Feb 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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