Synthesis and mechanical properties of TiCx and Ti(C,N) reinforced Titanium matrix in situ composites by reactive spark plasma sintering

In this study, Ti powders were ball-milled with 2 wt% graphene nanoplatelets (GnP) and graphitic carbon nitride (g-C3N4) and subjected to spark plasma sintering (SPS) in order to prepare Ti-TiCx and Ti–Ti(C,N) composites. Dispersion of GnP and g-C3N4 in Ti matrix after milling was analysed. The effe...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2019-06, Vol.759, p.30-39
Main Authors: Vasanthakumar, K., Ghosh, Sreetama, Koundinya, NTBN, Ramaprabhu, Sundara, Bakshi, Srinivasa Rao
Format: Article
Language:English
Subjects:
Ball milling
Carbon nitride
Compressive strength
Diamond pyramid hardness
Dispersion
Graphene
Graphene nanoplatelet
Graphitic carbon nitride
High temperature
Mechanical properties
Microstructure
Modulus of elasticity
Molecular composites
Nanohardness
Particulate composites
Plasma sintering
Spark plasma sintering
Ti matrix composites
Titanium
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Summary:In this study, Ti powders were ball-milled with 2 wt% graphene nanoplatelets (GnP) and graphitic carbon nitride (g-C3N4) and subjected to spark plasma sintering (SPS) in order to prepare Ti-TiCx and Ti–Ti(C,N) composites. Dispersion of GnP and g-C3N4 in Ti matrix after milling was analysed. The effect of GnP and g-C3N4 on microstructure, phase evolution and the mechanical properties of the resultant composites were studied. Lattice parameter evaluation indicated the presence of TiC0.40 phase in the sintered compact of Ti-2GnP whereas Ti(C, N) was found to be formed in Ti-2g-C3N4 compact. Microstructural studies indicated finer secondary phase in Ti-2g-C3N4 compared to Ti-2GnP due to well dispersion of g-C3N4 in Ti during milling. Ti-2g-C3N4 showed superior Vickers hardness (820 ± 28 VHN), elastic modulus (168 GPa), nanohardness (12 GPa), room temperature (2.9 GPa) and high temperature compression strength (120 MPa) compared to other composites and pure Ti.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2019.05.021