HRTEM study and mechanical properties of ZrB2–SiC composite: An insight into in-situ carbon formation over the SPS process
- Authors
- Yu, H.; Namini, A.S.; Shakeri, M.S.; Delbari, S.A.; Van, Le Q.; Cha, J.H.; Kim, S.Y.; Jang, H.W.; Lee, S.-H.; Swiatkowska-Warkocka, Z.; Shokouhimehr, M.
- Issue Date
- 4월-2022
- Publisher
- Elsevier Ltd
- Keywords
- Carbon; Composite; Mechanical properties; SiC; TEM; ZrB2
- Citation
- International Journal of Refractory Metals and Hard Materials, v.104
- Indexed
- SCIE
SCOPUS
- Journal Title
- International Journal of Refractory Metals and Hard Materials
- Volume
- 104
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/136603
- DOI
- 10.1016/j.ijrmhm.2022.105789
- ISSN
- 0263-4368
- Abstract
- In this research, we performed studies on the in-situ formation of carbon in the ZrB2–25 vol% SiC composite prepared by the spark plasma sintering (SPS) process at 1850 °C. The sintering behavior, microstructure, and mechanical properties of the resulted composite were also evaluated. The sample showed excellent sintering behavior, and a relative density of 99.77% could be obtained. X-ray diffractometry and microstructural results confirmed the in-situ formation of carbon during the SPS process. The source of carbon was found to be a reaction between SiC and its surface oxide. Moreover, the SiO2 and B2O3 compounds could form a low melting point eutectic phase and trigger the liquid phase sintering mechanism. The resulted composite achieved the fracture toughness of 5.63 MPa.m1/2, the Vickers hardness of 18.93 GPa, the flexural strength of 741 MPa, and the elastic modulus of 481 GPa. © 2022
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