Processing and structural characterization of Si-based carbothermal derivatives of rice husk
- Adediran, Adeolu Adesoji, Alaneme, Kenneth Kanayo, Oladele, Isiaka Oluwole, Akinlabi, Esther Titilayo
- Authors: Adediran, Adeolu Adesoji , Alaneme, Kenneth Kanayo , Oladele, Isiaka Oluwole , Akinlabi, Esther Titilayo
- Date: 2018
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/290405 , uj:31526 , Citation: Adediran et al., Cogent Engineering (2018), 5: 1494499 https://doi.org/10.1080/23311916.2018.1494499
- Description: Abstract: The processing and structural characterization of Si-based carbothermal derivatives of rice husk (RH) was investigated. RH, an agro-waste, was used as starting material in a single-stage processing route to produce Si-based refractory compounds via carbothermal treatment. The processing was carried out at different temperatures windows (900–1,900°C) at 10°C/min heating range in a controlled atmosphere. The functional groups of the reaction products were analyzed using Fourier transform infrared spectroscopy. The crystalline and amorphous phases were identified by X-ray diffractometer (XRD), while the morphological features were examined by scanning electron microscopy. It was observed that the major functional groups present after carbothermal treatment of RH are OH− (hydroxyl), Si–O–Si (siloxane), and Si–C groups. However, polytypes of silicon carbide (SiC) such as 3C-SiC (C = cubic), hexagonal symmetry 6H-SiC, and mixes of 3C-SiC, 2H-SiC, and 4H-SiC were various polytypes of SiC observed for different processing temperatures adopted. The SiC made up between 63 and 74 wt.% of the crystalline phases was identified by XRD from the process. Hence, the carbothermal treatment explored.
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- Authors: Adediran, Adeolu Adesoji , Alaneme, Kenneth Kanayo , Oladele, Isiaka Oluwole , Akinlabi, Esther Titilayo
- Date: 2018
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/290405 , uj:31526 , Citation: Adediran et al., Cogent Engineering (2018), 5: 1494499 https://doi.org/10.1080/23311916.2018.1494499
- Description: Abstract: The processing and structural characterization of Si-based carbothermal derivatives of rice husk (RH) was investigated. RH, an agro-waste, was used as starting material in a single-stage processing route to produce Si-based refractory compounds via carbothermal treatment. The processing was carried out at different temperatures windows (900–1,900°C) at 10°C/min heating range in a controlled atmosphere. The functional groups of the reaction products were analyzed using Fourier transform infrared spectroscopy. The crystalline and amorphous phases were identified by X-ray diffractometer (XRD), while the morphological features were examined by scanning electron microscopy. It was observed that the major functional groups present after carbothermal treatment of RH are OH− (hydroxyl), Si–O–Si (siloxane), and Si–C groups. However, polytypes of silicon carbide (SiC) such as 3C-SiC (C = cubic), hexagonal symmetry 6H-SiC, and mixes of 3C-SiC, 2H-SiC, and 4H-SiC were various polytypes of SiC observed for different processing temperatures adopted. The SiC made up between 63 and 74 wt.% of the crystalline phases was identified by XRD from the process. Hence, the carbothermal treatment explored.
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Nanoindentation studies and analysis of the mechanical properties of Ti-Nb2O5 based composites
- Alaneme, Kenneth Kanayo, Fatokun, Ayoyemi Adebanji, Oke, Samuel Ranti, Olubambi, Peter Apata
- Authors: Alaneme, Kenneth Kanayo , Fatokun, Ayoyemi Adebanji , Oke, Samuel Ranti , Olubambi, Peter Apata
- Date: 2020
- Subjects: Titanium based composites , Niobium pentoxide , Nanoindentation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/464025 , uj:41433 , Citation: Alaneme, K.K. et al. 2020. Nanoindentation studies and analysis of the mechanical properties of Ti-Nb2O5 based composites. , DOI: https://doi.org/10.1051/mfreview/2020017
- Description: Abstract: Please refer to full text to view abstract.
- Full Text:
- Authors: Alaneme, Kenneth Kanayo , Fatokun, Ayoyemi Adebanji , Oke, Samuel Ranti , Olubambi, Peter Apata
- Date: 2020
- Subjects: Titanium based composites , Niobium pentoxide , Nanoindentation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/464025 , uj:41433 , Citation: Alaneme, K.K. et al. 2020. Nanoindentation studies and analysis of the mechanical properties of Ti-Nb2O5 based composites. , DOI: https://doi.org/10.1051/mfreview/2020017
- Description: Abstract: Please refer to full text to view abstract.
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Nanoindentation studies and a alysis of the mechanical properties of Ti-Nb2O5 based composites
- Alaneme, Kenneth Kanayo, Fatokun, Ayoyemi Adebanji, Oke, Samuel Ranti, Olubambi, Peter Apata
- Authors: Alaneme, Kenneth Kanayo , Fatokun, Ayoyemi Adebanji , Oke, Samuel Ranti , Olubambi, Peter Apata
- Date: 2020
- Subjects: Titanium based composites , Niobium pentoxide , Nanoindentation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/453348 , uj:40020 , Citation: Alaneme, K.K. et al. 2020. Nanoindentation studies and a alysis of the mechanical properties of Ti-Nb2O5 based composites. , DOI: https://doi.org/10.1051/mfreview/2020017
- Description: Abstract: In this study, nanoindentation tests were used to evaluate the mechanical properties of spark plasma sintered Ti based composites containing 5, 10 and 15 wt.% Nb2O5, targeted for potential use as biomedical material. Nanoindentation tests were performed on the samples using indenter loads of 20 and 100 mN, while the microstructures were characterized using scanning electron microscopy. It was noted that with increasing Nb2O5 wt.%, there is transition from the lamellar structure of pure Ti to fully bimodal structures for the Ti-10 wt.% Nb2O5 and Ti-15 wt.% Nb2O5 composites. The hardness (6.0–40.67 GPa (20 mN) and 2.4–12.03 GPa (100 mN)) and reduced elastic modulus (115–266.91 GPa (20 mN) and (28.05–96.873 GPa (100 mN)) of the composites increases with increase in the Nb2O5 content, attributed to contributions of load transfer from the Ti matrix to the relatively harder Nb2O5 particles, particle and dispersion strengthening mechanisms. The elastic recovery index also improved with increase in Nb2O5 content, while the inverse was noted with respect to plasticity index. The elastic strain to failure and yield pressure both improved with increase in Nb2O5 content, which suggests that the antiwear properties and resistance to impact loading equally improves with Nb2O5 addition.
- Full Text:
- Authors: Alaneme, Kenneth Kanayo , Fatokun, Ayoyemi Adebanji , Oke, Samuel Ranti , Olubambi, Peter Apata
- Date: 2020
- Subjects: Titanium based composites , Niobium pentoxide , Nanoindentation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/453348 , uj:40020 , Citation: Alaneme, K.K. et al. 2020. Nanoindentation studies and a alysis of the mechanical properties of Ti-Nb2O5 based composites. , DOI: https://doi.org/10.1051/mfreview/2020017
- Description: Abstract: In this study, nanoindentation tests were used to evaluate the mechanical properties of spark plasma sintered Ti based composites containing 5, 10 and 15 wt.% Nb2O5, targeted for potential use as biomedical material. Nanoindentation tests were performed on the samples using indenter loads of 20 and 100 mN, while the microstructures were characterized using scanning electron microscopy. It was noted that with increasing Nb2O5 wt.%, there is transition from the lamellar structure of pure Ti to fully bimodal structures for the Ti-10 wt.% Nb2O5 and Ti-15 wt.% Nb2O5 composites. The hardness (6.0–40.67 GPa (20 mN) and 2.4–12.03 GPa (100 mN)) and reduced elastic modulus (115–266.91 GPa (20 mN) and (28.05–96.873 GPa (100 mN)) of the composites increases with increase in the Nb2O5 content, attributed to contributions of load transfer from the Ti matrix to the relatively harder Nb2O5 particles, particle and dispersion strengthening mechanisms. The elastic recovery index also improved with increase in Nb2O5 content, while the inverse was noted with respect to plasticity index. The elastic strain to failure and yield pressure both improved with increase in Nb2O5 content, which suggests that the antiwear properties and resistance to impact loading equally improves with Nb2O5 addition.
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Densification characteristics, microstructure and wear behaviour of spark plasma sintering processed titanium-niobium pentoxide (Ti-Nb2O5) based composites
- Alaneme, Kenneth Kanayo, Adu, Oluwaseun P., Oke, Samuel Ranti, Falodun, Oluwasegun Eso, Olubambi, Peter Apata
- 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.
- Full Text:
- 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.
- Full Text:
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