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Browsing Research Publications/Outputs by Impact Area "Powder Metallurgy Technologies"

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The adsorption of halogen molecules on Ti (110) surface

Author: Tshwane, David M ; Modiba, Rosinah ; Govender, Gonasagren ; Ngoepe, PE ; Chauke, R Date: Jan 2021 Adsorption of halogen on the metal surface has received much attention due to its technological applications and major relevance for material surface processing, corrosion protection and etching. In this work, first-principle approach was ... Read more
Adsorption of NH3 and NO2 molecules on sn-doped and undoped ZnO (101) surfaces using density functional theory

Author: Dima, Ratshilumela S ; Tshwane, David M ; Shingange, Katekani ; Modiba, Rosinah ; Maluta, NE ; Maphanga, Rapela R Date: 2022 The adsorption and interaction mechanisms of gaseous molecules on ZnO surfaces have received considerable attention because of their technological applications in gas sensing. The adsorption behavior of NH3 and NO2 molecules on undoped and ... Read more
Adsorption-desorption of F2 diatomic molecule on Ti (100) surface at different coverages

Author: Tshwane, David M ; Modiba, Rosinah ; Govender, Gonasagren ; Ngoepe, PE ; Chauke, HR Date: Dec 2021 Fluorine molecules and ions are used as an etchant for metal surface processing. The presence of fluorine significantly influences the electrochemical behaviour on a metal surface, which has major relevance for etching, corrosion, electro-catalysis ... Read more
Challenges in machining of advanced materials

Author: Mathabathe, Maria N ; Bolokang, Amogelang S Date: May 2022 Contemporary ways of employing and combining existing materials are a requisite for meeting tomorrow’s engineering applications. This is upscaled by the potent attributes of remaining competitive by keeping costs effective while advancing the ... Read more
The effect of alloying elements on densification and mechanical behaviour of titanium based alloy

Author: Teffo, ML ; Nyakane, NE ; Seerane, M ; Shongwe, MB ; Machaka, Roland Date: Feb 2021 The allotropic behavior of titanium is affected by many factors such as processing temperature and alloying elements. Using processing method with parameters that enhaces properties of the resulting alloy is imperative. In this study, CP-Ti, ... Read more
The effect of Cr additions and oxidation on densification, microstructure, phase constituents and mechanical properties of TiAlCr alloys produced by SPS

Author: Mogale, N ; Matizamhuka, W ; Machaka, Ronald ; Shongwe, M ; Yamabe-Mitarai, Y Y Date: Jan 2021 Ternary Ti-47.5Al-(1–3)Cr (at. %) and reference quaternary Ti-48Al-2Cr-2Nb (at. %) titanium aluminide alloys were processed from elemental powders utilizing mechanical milling, mechanical alloying and spark plasma sintering. The effect of Cr ... Read more
Effect of Nb glue atom in the cluster formula on the microstructure and mechanical properties of Ti-Mo alloy

Author: Raganya, Mampai L ; Moshokoa, N ; Obadele, B ; Makhatha, E ; Machaka, Ronald Date: 2021 The effect of Nb in the glue site of the cluster-plus-glue atom model formula on the microstructure and mechanical properties of Ti-Mo alloy was investigated. Phase and microstructural analysis were performed by X-ray diffraction and electron ... Read more
The effect of solution treatment on the microstructure and mechanical properties of as-cast Ti-Mo alloys

Author: Moshokoa, Nthabiseng ; Raganya, Mampai L ; Obadele, BA ; Olubambi, PA ; Machaka, Ronald Date: 2020 The present study investigates the effect of solution treatment on the microstructure and mechanical properties of as-cast Ti-Mo alloys. The two alloys (Ti-8Mo and Ti-9Mo) were fabricated using a commercially available Arc re-melting furnace. ... Read more
The electrochemical corrosion behaviour of Ti48Al-2Nb-0.7Cr-0.3Si alloy in 3.5%NaCl

Author: Magogodi, Steven M ; Mathabathe, Maria N ; Bolokang, Amogelang S ; Siyasiya, C Date: Nov 2022 Titanium aluminides (TiAl) have attracted industrial interest, particularly for high temperature applications owing to their promising mechanical properties. Due to the application of these materials to the marine environment it is therefore ... Read more
Fabrication of a ß-based titanium alloy for biomedical applications

Author: Madigoe, Mandy N ; Modiba, Rosinah ; Lesley, Cornish, L Date: Nov 2022 The aim of this study was to produce a titanium-based alloy with mainly ß-phase and reduced Young’s modulus for biomedical applications. Alloys Ti-Nbx-Ta5-Zr5 (x = 20, 30, 40 at.%Nb) were prepared by arc melting then solution annealed at 950 ... Read more
First principles study of phase stability and elastic properties of Ti94Mo6-xZrx (where x: 2 = x = 5) for biomaterials

Author: Mnisi, VC ; Sithole, ME ; Modiba, Rosinah Date: 2021 Elastic modulus is a very important physical aspect for biomaterials which is impartial to various replacements as artificially hip joints, bone plate, and gum implants since it measures the material’s resistance to be deformed elastically. ... Read more
First-principles investigation of W-V and W-Mo alloys as potential plasma facing materials (PFMs) for nuclear application bondMo alloys as potential plasma facing materials (PFMs) for nuclear application

Author: Phasha, MJ ; Bolokang, Amogelang S ; Kebede, Mesfin A Date: Feb 2021 Density-functional theory (DFT) based first-principles calculations were used to investigate the crystal structure, binding energy, phase stability and elastic properties of body-centered cubic (BCC) W-based binary solid solutions. The effect ... Read more
Grain structure orientational change in Ti6Al4V alloys induced by sea water quenching and novel stress relief annealing process

Author: Bolokang, Amogelang S ; Mathabathe, Maria N ; Motaung, DE ; Arendse, CJ ; Swart, HC Date: Mar 2023 We report on the microstructures and properties of Ti6Al4V alloys, which were achieved upon quenching in sea water medium with potential high cooling rate. The Ti6Al4V alloys were quenched at 1000 and 1100 °C, respectively. Moreover, the ... Read more
The high-temperature performance of Ti-46.5Al-%xTa (x = 0.8, 4 and 8 at.%) alloys produced using SPS

Author: Cobbinah, PV ; Matizamhuka, W ; Machaka, Ronald ; Shongwe, MB ; Yanabe-Mitaria, Y Date: Jan 2021 In this study, -TiAl based alloys of composition Ti-46.5Al-%xTa (x = 0.8, 4 and 8 at.%) were fabricated by mechanical alloying and consolidated by spark plasma sintering. The main objective of the study was to evaluate the influence Ta contents ... Read more
The high-temperature performance of Ti-46.5Al-%xTa (x = 0.8, 4 and 8 at.%) alloys produced using SPS

Author: Cobbinah, PV ; Matizamhuka, W ; Machaka, Ronald ; Shongwe, MB ; Yanabe-Mitaria, Y Date: Jan 2021 In this study, -TiAl based alloys of composition Ti-46.5Al-%xTa (x = 0.8, 4 and 8 at.%) were fabricated by mechanical alloying and consolidated by spark plasma sintering. The main objective of the study was to evaluate the influence Ta contents ... Read more
Highly adsorptive removal of palladium and platinum ions from wastewater using novel ethylenediamine-glutaraldehyde-grafted metal organic framework

Author: Maponya, TG ; Makgopa, K ; Somo, TR ; Tshwane, David M ; Modibane, KD Date: Dec 2023 Herein, a metal–organic framework (MIL-101(Cr)) was synthesized and functionalized with ethylenediamine-glutaraldehyde (ED-GA for removal of palladium (Pd2+) and platinum (Pt4+) from wastewater. The chemical structure, surface properties, ... Read more
Influence of SN on the microstructure and mechanical properties of TI-MO-NB alloys for orthopaedic applications

Author: Muchavi, Noluntu S ; Raganya, Mampai L ; Machaka, R ; Motsi, Glenda T ; Makhatha, E Date: Nov 2022 Metastable ß-Ti alloys intended for orthopaedic implants typically possess undesirable a', a", precipitates, which increase the elastic modulus. Non-toxic Sn was reported as an effective suppressor of a', a" and precipitates. Furthermore, ... Read more
Investigating the effects of Carbon and Boron atoms on the t- MnAl alloy properties employing the first principle approach

Author: Sebe, ID ; Sithole, ME ; Modiba, Rosinah Date: Dec 2022 Permanent magnet-based technologies are focusing on the use of t-phase magnetic alloys. The t-MnAl permanent magnetic alloys are interesting candidates to fill the performance gap between the expensive rare-earth-based magnets and the low ... Read more
Investigating the electronic and magnetic properties of Dy, Y and La by site substitution on Nd2Fe14B permanent magnet employing the first-principle approach

Author: Miya, LE ; Sithole, ME ; Modiba, Rosinah Date: Dec 2021 The development of new Nd-Fe-B permanent magnets continues to be a pressing matter for the transition to a green economy. Permanent magnets have become significant in applications of highly efficient energy conversion machines and devices. ... Read more
Investigation of the tensile properties of heat treated Ti-Mo alloys

Author: Raganya, Mampai L ; Moshokoa, Nthabiseng ; Obadele, BA ; Olubambi, PA ; Machaka, Ronald Date: 2020 Extensive efforts have been undertaken to develop Ti alloys consisting of single ß phase in order to substitute the a + ß phase in Ti-6Al-4V used as biomaterials. This study was aimed at investigating the tensile properties of solution treated ... Read more

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