The Effect of TiN-TiB2 on the Microstructure, Wear, and Nanoindentation Behavior of Ti6Al4V-Ni-Cr Matrix Composites

Oluwasegun Eso Falodun, Samuel Ranti Oke, Samuel Olukayode Akinwamide, Olawale Olarewaju Ajibola, Abdullahi Olawale Adebayo, Sunday Gbenga Borisade, Adeolu Adesoji Adediran, Peter Apata Olubambi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The influence of ceramic (TiN and TiB2) particles on the densification, microstructure, wear, and nanoindentation behavior of titanium matrix composites produced by spark plasma sintering was investigated. The results showed that the relative density of the Ti6Al4V-Ni-Cr-matrix composite with TiN and TiB2 was reduced from 99.51 to 95.33%. The microstructural analysis revealed that the reinforcements were dispersed uniformly within the composite, demonstrating the existence of lamellar (α and β phase) and bimodal structures. The average microhardness value gradually increased from 378 to 707 HV0.2, while the coefficient of friction ranged between 0.3 and 0.65. Furthermore, the material resisted the wear mechanism with improved wear resistance. The decreased frictional coefficient exhibited by the reinforced composite might be attributed to the oxide-layer formation, which served as a lubricant reducing friction between the two gliding surfaces of the material. The nanohardness values ranged from 6363.3 to 10,343 MPa, while the reduced-elastic-modulus values varied from 122.9 to 158.93 GPa.

Original languageEnglish
Pages (from-to)5566-5575
Number of pages10
JournalJournal of Materials Engineering and Performance
Issue number12
Publication statusPublished - Jun 2023


  • ceramic particles
  • microstructure
  • nanoindentation behavior
  • spark plasma sintering
  • titanium alloys

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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