• Satyananda Behera

      Articles written in Bulletin of Materials Science

    • Sintering of magnesia: effect of additives

      Satyananda Behera Ritwik Sarkar

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      Effect of different additives, namely Cr2O3, Fe2O3 and TiO2, up to 2 wt% was studied on the sintering and microstructural developments of the chemically pure magnesia using the pressureless sintering technique between 1500 and 1600° C. Sintering was evaluated by per cent densification and microstructural developments were studied by electron microscopy and elemental distribution of the additives in the sintered products was also investigated for their distribution in the matrix. Cr2O3 and TiO2 were found to deteriorate the densification associated with grain growth. Fe2O3 was found to improve the densification and well-compacted grain distribution was observed in the microstructure.

    • Formation of Mg$_2$C$_3$ phase in N220 nanocarbon containing low carbon MgO-C composition

      SATYANANDA BEHERA RITWIK SARKAR

      More Details Abstract Fulltext PDF

      This paper reports a non-conventional microstructurewith sequicarbide (Mg$_2$C$_3$) formation in N220 nanocarboncontaining low carbon magnesia carbon composition having magnesium metal powder as antioxidant. 5 wt% graphitecontaining MgO-C refractory with and without 1 wt% N220 nanocarbon is studied and 2 wt% magnesium metal powder isused as the lone antioxidant. The compositions were mixed with powder and liquid resin binder, pressed uniaxially at 150MPa and cured at 220$^{\circ}$C. Cured samples were coked at 1000$^{\circ}$C for 2 h. Matrix of the coked samples was studied in detail for microstructural analysis phase content and formation of nail-shaped sequicarbide was found in the nanocarbon containing compositions. The in-situ sequicarbide formation has resulted in the strength of the batch.

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    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

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