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- Title
Influence of spark plasma sintering on microstructure and corrosion behaviour of Ti-6Al-4V alloy reinforced with micron-sized Si<sub>3</sub>N<sub>4</sub> powder.
- Authors
Kgoete, F. M.; Popoola, A. P. I.; Fayomi, O. S. I.
- Abstract
Ti-6Al-4V-Si3N4 composites were effectively fabricated by spark plasma sintering (SPS) technique. The addition of Si3N4 on Ti-6Al-4V was varied from 5% to 15% (wt fraction). The effect of Si3N4 addition on the densification, microstructure, and microhardness and corrosion behaviour of Ti-6Al-4V was investigated. An increase in microhardness value was recorded from 325.46 HV0.1 to 585.73 HV0.1. X-ray diffraction (XRD) analysis showed that the intensity of diffraction peaks of Si3N4 phase in the composites increased. The sintered Ti-6Al-4V reinforced with Si3N4 compacts revealed the non-existence of intermediate phases, such as TiSi2 (titanium silicide) which was expected. SEM analysis of the spark plasma sintered composites revealed α and β phase microstructures in Ti-6Al-4V with uniform distribution of Si3N4 particulates in the matrix. The corrosion resistance property of the material was improved by the addition of Si3N4 from 0.986629 mm/year to 0.030547 mm/year.
- Subjects
MICROSTRUCTURE; X-ray diffraction; MICROHARDNESS; TITANIUM; ALLOYS
- Publication
Defence Technology, 2018, Vol 14, Issue 5, p403
- ISSN
2096-3459
- Publication type
Article
- DOI
10.1016/j.dt.2018.04.011