Microstructural and phase evolution of spark plasma sintering of graphitized Ti (C0.9N0.1) composites

Ojo Jeremiah Akinribide; Gadifele Nicolene Mekgwe; Babatunde Abiodun Obadele; Olawale Olarewaju Ajibola; Samuel Olukayode Akinwamide; Peter Apata Olubambi

doi:10.1016/j.ijrmhm.2018.09.013

Microstructural and phase evolution of spark plasma sintering of graphitized Ti (C_0.9N_0.1) composites

Ojo Jeremiah Akinribide, Gadifele Nicolene Mekgwe, Babatunde Abiodun Obadele, Olawale Olarewaju Ajibola, Samuel Olukayode Akinwamide, Peter Apata Olubambi

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Graphite addition on the particle grain sizes, multiple phases and the ultrafine Ti (C_0.9, N_0.1) 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 (C_0.9, N_0.1) cermet and thereby crippled the sinterability of Ti (C_0.9, N_0.1). Significantly, graphite additions had an influence on particle size, morphology, microstructure and phases of ultrafine Ti (C_0.9, N_0.1) 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 (C_0.9, N_0.1) composite and sintered relative density of the cermets.

Original language	English
Pages (from-to)	164-169
Number of pages	6
Journal	International Journal of Refractory Metals and Hard Materials
Volume	78
DOIs	https://doi.org/10.1016/j.ijrmhm.2018.09.013
Publication status	Published - Jan 2019

Keywords

Graphite
Microhardness
Microstructure
Porosity
Spark plasma sintering
Ti (C, N)

ASJC Scopus subject areas

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.ijrmhm.2018.09.013

Cite this

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title = "Microstructural and phase evolution of spark plasma sintering of graphitized Ti (C0.9N0.1) composites",

abstract = "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.",

keywords = "Graphite, Microhardness, Microstructure, Porosity, Spark plasma sintering, Ti (C, N)",

author = "Akinribide, {Ojo Jeremiah} and Mekgwe, {Gadifele Nicolene} and Obadele, {Babatunde Abiodun} and Ajibola, {Olawale Olarewaju} and Akinwamide, {Samuel Olukayode} and Olubambi, {Peter Apata}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2019",

month = jan,

doi = "10.1016/j.ijrmhm.2018.09.013",

language = "English",

volume = "78",

pages = "164--169",

journal = "International Journal of Refractory Metals and Hard Materials",

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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

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.

KW - Graphite

KW - Microhardness

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KW - Porosity

KW - Spark plasma sintering

KW - Ti (C, N)

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