TY - JOUR
T1 - Microstructural and phase evolution of spark plasma sintering of graphitized Ti (C0.9N0.1) composites
AU - Akinribide, Ojo Jeremiah
AU - Mekgwe, Gadifele Nicolene
AU - Obadele, Babatunde Abiodun
AU - Ajibola, Olawale Olarewaju
AU - Akinwamide, Samuel Olukayode
AU - Olubambi, Peter Apata
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/1
Y1 - 2019/1
N2 - Graphite addition on the particle grain sizes, multiple phases and the ultrafine Ti (C0.9, N0.1) composite produced by means of spark plasma sintering (SPS) was examined by means of X-ray diffractometer (XRD), and scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS). From the results analysed, the presence of graphite increased the porosity of sintered Ti (C0.9, N0.1) cermet and thereby crippled the sinterability of Ti (C0.9, N0.1). Significantly, graphite additions had an influence on particle size, morphology, microstructure and phases of ultrafine Ti (C0.9, N0.1) by inhibiting the dissolution of titanium carbonitride, outer rims phases and the inner rim formation, thereby causing grain growth reduction. Because of depressed dissolution and solution precipitate, graphite phase evolution in the composite has reduced. Furthermore, the presence of graphite improved the micro indentation hardness of Ti (C0.9, N0.1) composite and sintered relative density of the cermets.
AB - Graphite addition on the particle grain sizes, multiple phases and the ultrafine Ti (C0.9, N0.1) composite produced by means of spark plasma sintering (SPS) was examined by means of X-ray diffractometer (XRD), and scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS). From the results analysed, the presence of graphite increased the porosity of sintered Ti (C0.9, N0.1) cermet and thereby crippled the sinterability of Ti (C0.9, N0.1). Significantly, graphite additions had an influence on particle size, morphology, microstructure and phases of ultrafine Ti (C0.9, N0.1) by inhibiting the dissolution of titanium carbonitride, outer rims phases and the inner rim formation, thereby causing grain growth reduction. Because of depressed dissolution and solution precipitate, graphite phase evolution in the composite has reduced. Furthermore, the presence of graphite improved the micro indentation hardness of Ti (C0.9, N0.1) composite and sintered relative density of the cermets.
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U2 - 10.1016/j.ijrmhm.2018.09.013
DO - 10.1016/j.ijrmhm.2018.09.013
M3 - Article
AN - SCOPUS:85053782761
SN - 0263-4368
VL - 78
SP - 164
EP - 169
JO - International Journal of Refractory Metals and Hard Materials
JF - International Journal of Refractory Metals and Hard Materials
ER -