Abstract
In this research, the influence of graphite platelet (GP) and its co-reinforced with SiC on the microstructure and flexural strength of ZrB2, was investigated. So, ZrB2, and ZrB2-30 vol% SiC reinforced with 10 and 15 vol% GP were fabricated through spark plasma sintering (SPS) at 1850 ºC for 8 min under a uniaxial pressure of 35 MPa. Full densification was gained in ZrB2 co-reinforced with GP (in both amounts of 10 and 15 vol%) and SiC. The microstructural evaluation and flexural strength were studied via field emission electron microscopy (FESEM) and three-point bending test. It was found, GP acts as a grain growth inhibitor in ZrB2 and ZrB2-30 vol% SiC and the finest microstructure obtained for ZrB2 co-reinforced with 10 vol% GP and SiC (3.3 µm). However, a slight increase occurred for ZrB2-30 vo l%-15 vol% GP due to some agglomeration introduced in the microstructure. The maximum flexural strengths of ZrB2 (319 MPa) and ZrB2-SiC (445 MPa) were obtained at 10 vol% GP addition. It was determined that synergetic applying SiC and GP has more benefits on the sintering and flexural strength rather than individually.
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References
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Zohre Balak: Data analyzing, Writing, Final technicality and grammar correction. Mostafa shahriari Asl: Conducting the experimental tests, Data collection.
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Asl, M.S., Balak, Z. Fabrication and Characterization of ZrB2 Ceramic in Presence of Graphite Platelet and SiC. Silicon 15, 6911–6919 (2023). https://doi.org/10.1007/s12633-023-02553-w
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DOI: https://doi.org/10.1007/s12633-023-02553-w