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Al2O3-Reinforced TiB2-Fe Composites: Microstructural and Mechanical Properties

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Abstract

In this study, the effects of Al2O3 addition on microstructural and mechanical properties of TiB2-3 wt.% Fe composites were investigated. At first, TiB2 was synthesized via carbothermal reduction method. Then, four batches of TiB2-3 wt.%Fe-x wt.%Al2O3 (x = 0, 10, 20, 30) were prepared and consolidated by spark plasma sintering method at 1700 °C. Phase evaluation and microstructural observation of the prepared composites were studied through x-ray diffraction and field-emission scanning electron microscopy (FESEM) analysis, respectively. Vickers indentation and three point bending tests were used to evaluate the hardness, fracture toughness and flexural strength of the composites. Results showed that the addition of Al2O3 improved the densification and mechanical properties of the composites, however, the grain growth occurred. In other words, the results showed that the sample containing 10 wt.% Al2O3, exhibited the optimal mechanical properties, relative density (97 ± 1.8 g/cm3), hardness (18.70 ± 0.6 GPa), flexural strength (479.2 ± 34.2 MPa) and fracture toughness (6.84 ± 0.36 MPa m1/2).

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Acknowledgments

The authors would like to acknowledge the Materials and Energy Research Center (MERC) for providing the financial support throughout the research grant (No. 99391001).

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Authors and Affiliations

  1. Department of Ceramics, Materials and Energy Research Center, P.O. Box 31787-316, Karaj, Iran

    Sadaf Habibzadeh, Leila Nikzad & Hudsa Majidian

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  1. Sadaf Habibzadeh
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  2. Leila Nikzad
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Correspondence to Leila Nikzad.

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Habibzadeh, S., Nikzad, L. & Majidian, H. Al2O3-Reinforced TiB2-Fe Composites: Microstructural and Mechanical Properties. J. of Materi Eng and Perform (2023). https://doi.org/10.1007/s11665-023-08308-3

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