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Densification, Microstructural Evolution, Mechanical Properties and Oxidation Study of CrB2 + EuB6 Composite

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Abstract

This paper reports the results of investigation on densification, microstructural evolution, mechanical properties and oxidation study of CrB2 + EuB6 composite. CrB2 + EuB6 (10 and 20 wt.%) composites have been fabricated by hot pressing at a temperature of 1700 °C and 35 MPa pressure. The hardness and flexural strength were measured in the range of 21.25-24.48 GPa and 171-199 MPa, respectively. The fracture toughness increased from 3.3 to 4.01 MPa m1/2 by the addition of 20% EuB6. Microstructural evolution revealed the uniform distribution of EuB6 and absence of any reaction product. Fracture surface analysis confirmed the presence of transgranular mode of fracture. Oxidation study at 1200 °C revealed that the developed composites have good oxidation resistance and followed the parabolic rate of oxidation.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, National Institute of Technology, Warangal, India

    K. Raju & G. V. S. Nageswar Rao

  2. Materials Processing and Corrosion Engineering Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India

    J. K. Sonber, T. S. R. Ch. Murthy, K. Sairam, S. Majumdar & V. Kain

  3. Homi Bhabha National Institute, Mumbai, India

    T. S. R. Ch. Murthy, K. Sairam, S. Majumdar & V. Kain

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  1. K. Raju
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  2. J. K. Sonber
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  5. S. Majumdar
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Correspondence to J. K. Sonber.

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Raju, K., Sonber, J.K., Murthy, T.S.R.C. et al. Densification, Microstructural Evolution, Mechanical Properties and Oxidation Study of CrB2 + EuB6 Composite. J. of Materi Eng and Perform 27, 2457–2465 (2018). https://doi.org/10.1007/s11665-018-3354-2

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  • DOI: https://doi.org/10.1007/s11665-018-3354-2

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