TY - JOUR
T1 - ZrB2-ZrCxN1-x Eutectic Composites Produced by Melt Solidification
AU - Cheng, Eric Jianfeng
AU - Katsui, Hirokazu
AU - Goto, Takashi
N1 - Funding Information:
This study was supported by the Tohoku University, Japan and the MEXT (Ministry of Education, Culture, Sports, Science and Technology), Scientific Research (B) No. 25289223. Eric Jianfeng Cheng thanks the financial support from the China Scholarship Council, P.R.China. Eric Jianfeng Cheng would also thank Dr. Robert Schmidt for proofreading the manuscript.
Publisher Copyright:
© 2015 The American Ceramic Society.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - 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.
AB - 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.
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U2 - 10.1111/jace.13984
DO - 10.1111/jace.13984
M3 - Article
AN - SCOPUS:84951763249
SN - 0002-7820
VL - 99
SP - 667
EP - 673
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 2
ER -