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The role of graphite addition on spark plasma sintered titanium nitride

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dc.contributor.author Akinribide, Ojo Jeremiah
dc.contributor.author Obadele, Babatunde Abiodun
dc.contributor.author Ayeleru, Olusola Olaitan
dc.contributor.author Akinwamide, Olukayode Samuel
dc.contributor.author Nomoto, Keita
dc.contributor.author Eizadjou, Mehdi
dc.contributor.author Ringer, Simon P.
dc.contributor.author Olubambi, Peter Apata
dc.date.accessioned 2021-02-15T14:29:11Z
dc.date.available 2021-02-15T14:29:11Z
dc.date.issued 2020-05
dc.identifier.citation Akinribide, O.J. et al (2020) The role of graphite addition on spark plasma sintered titanium nitride. Journal of Materials Research and Technology, 9 (3) 6268-6277,https://doi.org/10.1016/j.jmrt.2020.03.040. en_US
dc.identifier.issn 2238-7854
dc.identifier.uri http://repository.biust.ac.bw/handle/123456789/264
dc.description.abstract Composites of titanium nitride reinforced with graphite were synthesized using spark plasma sintering at 2000 °C. The effects of graphite addition on the microstructure, relative density, and mechanical properties of TiN ceramics matrix were examined. The investigation was performed on TiN powder with varying graphite content (1–5 wt.%) for 8 h using an energy ball milling equipment. Results show that TiN without and with graphite (TiN + 1 wt.% graphite) sintered at 2000 °C recorded sintered relative density of 96.7% and 97% respectively. Additionally, TiN with 3 wt.% graphite had a relative density of 98%. However, the shrinkage of TiN + 3 wt.% graphite was observed to be the lowest compared to other composites at the same sintering conditions. Microstructural analysis indicates that the grain of titanium nitride in the composite was very fine and continuous. Subsequently, a bimodal particle sizes were observed when 5 wt.% graphite was dispersed in TiN. The highest Vickers microhardness of 23.5 GPa and fracture toughness of 6.5 MPa m1/2 were achieved with composites reinforced with 3 wt.% graphite at milling period of 8 h. The combination of TEM/EDS and HRTEM/FFT show a single pattern of diffraction and consistency in interplanar distance obtained from X-ray diffractometry of the milled sample. There is a clear coherence interface between the phases. en_US
dc.language.iso en en_US
dc.publisher Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license en_US
dc.subject TiN en_US
dc.subject Graphite en_US
dc.subject Spark plasma sintering en_US
dc.subject Microstructure en_US
dc.title The role of graphite addition on spark plasma sintered titanium nitride en_US
dc.description.level phd en_US
dc.description.accessibility unrestricted en_US
dc.description.department cme en_US


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