Fabrication and characterization of titanium-nickel-zirconia matrix composites prepared by spark plasma sintering

Babatunde Abiodun Obadele, Oladeji Oluremi Ige, Peter Apata Olubambi

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Ti–Ni–ZrO2 composites were prepared by spark plasma sintering (SPS). The effect of ZrO2 content on the densification, microstructure and microhardness properties of the composites were investigated. Samples were characterized by SEM, EDS and XRD analyses. Noticeably, SPS process under the sintering conditions was achieved at a sintering temperature of 950 °C, for 10 min holding time, at 100 °C/min of heating rate and at an applied pressure of 50 MPa. This resulted in maximum densification of the powder compact and the formation of a distinguishable spherical globules rich in Ni surrounding the retained Ti. Gradient composition distribution of ZrO2 at the grain boundaries resulted into pinning effect of the grain growth. As the ZrO2 content increased from 5 to 10 vol%, it was accompanied by a significant increase in hardness values of the sintered composites from 480 to 713 HV.

Original languageEnglish
Pages (from-to)825-830
Number of pages6
JournalJournal of Alloys and Compounds
Volume710
DOIs
Publication statusPublished - Jan 1 2017
Externally publishedYes

Fingerprint

Spark plasma sintering
Titanium
Nickel
Zirconia
Densification
Fabrication
Composite materials
Sintering
Heating rate
Grain growth
Powders
Microhardness
Energy dispersive spectroscopy
Grain boundaries
Hardness
Microstructure
Scanning electron microscopy
Chemical analysis
zirconium oxide
Temperature

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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abstract = "Ti–Ni–ZrO2 composites were prepared by spark plasma sintering (SPS). The effect of ZrO2 content on the densification, microstructure and microhardness properties of the composites were investigated. Samples were characterized by SEM, EDS and XRD analyses. Noticeably, SPS process under the sintering conditions was achieved at a sintering temperature of 950 °C, for 10 min holding time, at 100 °C/min of heating rate and at an applied pressure of 50 MPa. This resulted in maximum densification of the powder compact and the formation of a distinguishable spherical globules rich in Ni surrounding the retained Ti. Gradient composition distribution of ZrO2 at the grain boundaries resulted into pinning effect of the grain growth. As the ZrO2 content increased from 5 to 10 vol{\%}, it was accompanied by a significant increase in hardness values of the sintered composites from 480 to 713 HV.",
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Fabrication and characterization of titanium-nickel-zirconia matrix composites prepared by spark plasma sintering. / Obadele, Babatunde Abiodun; Ige, Oladeji Oluremi; Olubambi, Peter Apata.

In: Journal of Alloys and Compounds, Vol. 710, 01.01.2017, p. 825-830.

Research output: Contribution to journalArticle

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