Influence of sintering technology on microstructure and mechanical properties of ZrB2-YAG-Al2O3 ceramics

DOI

10.2991/emcpe-16.2016.58How to use a DOI?

Keywords

Ultra-high-temperature ceramics; ZrB2; Sintering technology; Mechanical property.

Abstract

ZrB2, YAG and Al2O3 are widely applied because of some excellent performances, but ZrB2 is easily oxidized in the high-temperature air. To keep advantages and improve disadvantages of ZrB2, the shell-core structure A12O3-Y2O3/ZrB2 composite powders are prepared by the co-precipitation methods, the high density ZrB2-YAG-Al2O3 ceramics is prepared by the spark plasma sintering (SPS). The mechanical properties of prepared ceramics under the 20MPa sintering pressure and 4min holding time are shown, which indicates the mechanical properties are increased with increasing sintering temperature, and the increasing ratio of mechanical properties is faster at sintering temperature from 1300 to 1700. When the sintering condition is 1700, 20 MPa and 4 minutes, the Young's modulus and the fracture toughness are 421.8 GPa and 12.23 MPam1/2, respectively. The reinforced phase (YAG-Al2O3) is coated on the surface of ZrB2 crystal, that is to say, the YAG-Al2O3 is show on the crystal boundary, which is help for the densification and the mechanical properties.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jie-Guang Song
AU  - Ming-Han Xu
AU  - Shi-Bin Li
AU  - Shi-Zhe Li
AU  - Ting-Ting Xia
AU  - Yao-Qi Li
AU  - Ning Wang
AU  - Si-Yuan Yu
AU  - Lin Chen
PY  - 2016/08
DA  - 2016/08
TI  - Influence of sintering technology on microstructure and mechanical properties of ZrB2-YAG-Al2O3 ceramics
BT  - Proceedings of the 2016 5th International Conference on Environment, Materials, Chemistry and Power Electronics
PB  - Atlantis Press
SP  - 276
EP  - 279
SN  - 2352-5401
UR  - https://doi.org/10.2991/emcpe-16.2016.58
DO  - 10.2991/emcpe-16.2016.58
ID  - Song2016/08
ER  -