Influence of SiAlON ceramic reinforcement on Ti6Al4V alloy matrix via spark plasma sintering technique
- Authors: Falodun, Oluwasegun Eso , Oke, Samuel Ranti , Obadele, Babatunde Abiodun , Okoro, Avwerosuoghene Moses , Olubambi, Peter Apata
- Date: 2019
- Subjects: Powder metallurgy , Ti6Al4V , SiAlON
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/406789 , uj:34215 , Citation: Falodun, O.E. et al. 2019 : Influence of SiAlON ceramic reinforcement on Ti6Al4V alloy matrix via spark plasma sintering technique. DOI: https://doi.org/10.1007/s12540-019-00553-3.
- Description: Abstract : The titanium-based composite was fabricated by strengthening Ti6Al4V alloy with addition of SiAlON ceramics utilizing spark plasma sintering technique. Ti6Al4V and SiAlON powders were mixed in a T2F Turbula mixer with different propor- tions (5, 10, 15 and 20 vol%) and the admixed powders were consolidated using spark plasma sintering to produce titanium matrix composites. The characterization of the sintered composites was performed using X-ray diffraction, optical microscopy and scanning electron microscopy. The influence of SiAlON additions on densification, microstructure, microhardness and fracture morphology were investigated on the sintered composites. The experimental results revealed that the densification of the sintered titanium matrix composites was in the range of 95%–98%, which decreased with an increase in SiAlON addition. However, an increase in microhardness values ranging from 363 to 574 HV0.1 was achieved. The microstructure shows that the SiAlON ceramic particle was uniformly distributed within the titanium matrix composites which comprises of a mixture of lamellar colonies with β grain boundaries. The fracture features of all composites exhibit mixed fracture of both intergranular and transgranular fracture mechanism.
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Spark plasma sintering of nanoceramics dispersion strengthened titanium aluminium vanadium alloy
- Authors: Falodun, Oluwasegun Eso
- Date: 2019
- Subjects: Titanium-aluminum-vanadium alloys , Ceramic powders , Nanoparticles , Sintering
- Language: English
- Type: Doctoral (Thesis)
- Identifier: http://hdl.handle.net/10210/297379 , uj:32418
- Description: Abstract: Please refer to full text to view abstract. , Ph.D.
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Densification characteristics, microstructure and wear behaviour of spark plasma sintering processed titanium-niobium pentoxide (Ti-Nb2O5) based composites
- Authors: Alaneme, Kenneth Kanayo , Adu, Oluwaseun P. , Oke, Samuel Ranti , Falodun, Oluwasegun Eso , Olubambi, Peter Apata
- Date: 2020
- Subjects: Metallic biomaterial , Ti based composite , Niobium pentoxide
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/457519 , uj:40601 , Citation: Kenneth Kanayo Alaneme, O.P. Adu, Samuel Ranti Oke et al., Densification characteristics, microstructure and wear behaviour of spark plasma sintering processed titanium-niobium pentoxide (Ti-Nb2O5) based composites, Journal of King Saud University – Engineering Sciences, https://doi.org/ 10.1016/j.jksues.2020.10.005
- Description: Abstract: Please refer to full text to view abstract.
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Synthesis and characterization of commercial pure titanium-nickel alloy behavior reinforced with titanium diboride
- Authors: Falodun, Oluwasegun Eso , Oke, Samuel Ranti , Olubambi, Peter Apata
- Date: 2020
- Subjects: Titanium , Nickel , TiB2
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/458331 , uj:40705 , Falodun, O.E., Oke, S.R., Olubambi, P.A.: Synthesis and characterization of commercial pure titanium-nickel alloy behavior reinforced with titanium diboride.
- Description: Abstract: Commercial pure titanium alloy with Ni-TiB2 ceramic additions (5, 10, 15 and 20 vol.%) were synthesized through the spark plasma sintering approach with sintering temperature of 1000 oC, the heating rate of 100 oC/min, holding time of 5 min at a constant pressure of 50 MPa. The study investigated the effect of Ni-TiB2 on the densification, phase change, microhardness, microstructure, and wear properties of the sintered titanium-based composites. Results showed that Ti-Ni-TiB2 composites relative density ranges from 97 to 99 %, while microhardness values increase with addition of nickel and titanium diboride from 228 to 587 HV0.1. The microstructural evolution shows that pure titanium transformed from lamellar phase to equiaxed alpha phase upon addition of nickel alloy and further get refined with a distinct grain boundary comprises of titanium diboride around the boundaries. The average coefficient of friction for the titanium-based composite was higher for commercially pure titanium (0.73) while the addition of TiB2 exhibit (0.66, 0.63, 0.58, 0.55 and 0.46 respectively) improvement in the wear behavior.
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