Research article
Role of Si3N4 on microstructure and hardness of hot-pressed ZrB2−SiC composites
- 1 Department of Biophysics, Istanbul University-Cerrahpasa, Istanbul, Turkey
- 2 Department of Forest Biomaterials, College of Natural Resources, North Carolina State University, Raleigh, North Carolina, 27695-8005, United States
- 3 Department of Materials Science and Engineering٫ North Carolina State University, Raleigh, North Carolina, 27695-8005, United States
- 4 Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
- 5 Division of Powder/Ceramics Research, Korea Institute of Materials Science, Changwon, 51508, Republic of Korea
Abstract
The impact of Si3N4 content on the hardness and microstructural developments of ZrB2-SiC material has been investigated thoroughly in the present investigation. Having prepared the raw materials in a jar mill, the ZrB2-SiC samples containing various amounts of Si3N4 were hot-pressed at 1850 °C. Furthermore, XRD, FESEM, and HRTEM were utilized to evaluate the microstructure of samples. The formation of in-situ h-BN was proved by the mentioned methods. Also, it was shown that the Vickers hardness of ZrB2-SiC increases up to 20 GPa in presence of 4.5 wt% Si3N4 which is 3 GPa more than the sample without Si3N4. Results show that the positive effect of increased relative density on hardness is more than the negative effect of h-BN soft phase formation.
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Keywords:
Hot-pressing, ZrB2-SiC-Si3N4, Microstructure, Hardness
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Cited By
Submitted
2021-03-15
Available online
2021-04-10
How to Cite
Bahararjmand, Z., Khalilzadeh, M. A., Saberi-Movahed, F., Lee, T. H., Wang, J., Lee, S.- hoon, & Jang, H. W. (2021). Role of Si3N4 on microstructure and hardness of hot-pressed ZrB2−SiC composites. Synthesis and Sintering, 1(1), 34-40. https://doi.org/10.53063/synsint.2021.1113
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Copyright (c) 2021 Zahra Bahararjmand, Mohammad A. Khalilzadeh, Farshad Saberi-Movahed, Tae Hyung Lee, Jinghan Wang, Sea-hoon Lee, Ho Won Jang
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