• Phase effects in tap-hole flow – a computational modelling study 

  Reynolds, QG; Olsen, JE; Erwee, MW; Oxtoby, Oliver F (SAIMM, 2019-06)

  The extraction of molten products and wastes through smelting furnace tap-holes during the tapping process is a complex procedure involving many coupled thermophysical effects. Insight into the fluid flow behaviour in such ...
• A techno-economic analytical approach of laser-based additive manufacturing processes for aerospace applications 

  Oyesola, M; Mpofu, K; Mathe, Ntombizodwa R (Elsevier, 2019-08)

  Additive manufacturing (AM) of laser-based technological solution is developing at an exponential rate and is stepping towards industrialisation. The value and possibilities it brings to modern design and manufacturing ...
• Corroboration of a multi-phase screen model 

  Mabena, Chemist M; Bell, Lebohang T; Roux, FS (SPIE, 2019-02)

  The solution of the infinitesimal propagation equation for atmospheric propagation of single-photon and entangled quantum states, represented in terms of Laguerre-Gauss modes, which is a discrete orbital angular momentum ...
• Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy 

  Mathabathe, Maria N; Govender, Gonasagren; Bolokang, Amogelang S; Mostert, RJ; Siyasiya, CW (Elsevier, 2018-05)

  The -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was developed. Microstructure evolution of the as-cast and heat-treated alloy yielded the spheriodised and Widmanstätten laths. High temperature differential thermal ...
• Allotrope conversion and surface hardness increase in ion implanted boron nitride 

  Derry, TE; Lisema, LI; Magabe, AT; Aradi, E; Machaka, Ronald; Madhuku, M (Elsevier, 2018-12)

  Previously, it has been shown that the implantation of hexagonal boron nitride with light ions (e.g. He+, Li+, B+) produces a surface layer containing nanoparticles of the much harder cubic form, as revealed by Raman ...
• REASSURED diagnostics to inform disease control strategies, strengthen health systems and improve patient outcomes 

  Land, Kevin J; Boeras, DI; Chen, X-S; Ramsay, AR; Peeling, RW (Springer Nature, 2018-12)

  Lack of access to quality diagnostics remains a major contributor to health burden in resource-limited settings. It has been more than 10 years since ASSURED (affordable, sensitive, specific, user-friendly, rapid, ...
• Synthesis of porous polymer-based metal–organic frameworks monolithic hybrid composite for hydrogen storage application 

  Molefe, Lerato Y; Musyoka, Nicholas M; Ren, Jianwei; Langmi, Henrietta W; Ndungu, PG; Dawson, R; Mathe, Mahlanyane K (Springer, 2019-01)

  Herein, we report a simple method for the preparation of cross-linked polymer of intrinsic microporosity (PIM-1)/Materials Institute Lavoisier chromium (III) terephthalate [MIL-101(Cr)] monoliths which involves direct ...
• Dimethylformamide is a novel nitrilase inducer in Rhodococcus rhodochrous 

  Chhiba, Varsha P; Mathiba, Kgama; Van der Westhuyzen, Christiaan W; Steenkamp, Paul A; Rashamuse, JK; Stoychev, Stoyan H; Bode, ML; Brady, D (Springer, 2018-12)

  Nitrilases are of commercial interest in the selective synthesis of carboxylic acids from nitriles. Nitrilase induction was achieved here in three bacterial strains through the incorporation of a previously unrecognised ...
• Rationality and context in defeasible subsumption 

  Britz, Katarina; Varzinczak, Ivan J (Springer, 2018-04)

  Description logics have been extended in a number of ways to support defeasible reasoning in the KLM tradition. Such features include preferential or rational defeasible concept subsumption, and defeasible roles in complex ...
• Beneficiation of sawdust waste in the context of an integrated forest bio-refinery mill: Kraft and pre-hydrolysis Kraft pulping properties 

  Andrew, JE; Johakimu, J; Lekha, P; Gibril, ME; Sithole, BB (UNISA, 2018)

  As part of a broader objective to extract cellulose from sawdust waste material for the production of nano-crystalline cellulose, conventional industrially available processes such as the Kraft and pre-hydrolysis Kraft ...
• Tuning hydrophobic-hydrophilic balance of cathode catalyst layer to improve cell performance of proton exchange membrane fuel cell (PEMFC) by mixing polytetrafluoroethylene (PTFE) 

  Chi, B; Hou, S; Liu, G; Deng, Y; Zeng, J; Song, H; Liao, S; Ren, Jianwei (Elsevier, 2018-06)

  The wettability, or hydrophobic-hydrophilic balance, of cathode catalyst layer influences the performance of the proton exchange membrane fuel cell. In this paper, cathode catalyst layer with different polytetrafluoroethylene ...
• Microstructure and material properties of LENS fabricated Ti-6Al-4V components 

  Arthur, Nana KK; Pityana, Sisa L (SAIMechE, 2018-10)

  Cylindrical components of dimensions 15 mm in diameter and 11 mm in height were laser printed by additive manufacturing using a LENS!™ system. Process parameters used in layer by layer build-ups showed that energy densities ...
• Structure-property orientation relationship of a /a2/Ti5Si3 in as-cast Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy 

  Mathabathe, Maria S; Bolokang, Amogelang S; Govender, Gonasagren; Mostert, RJ; Siyasiya, CW (Elsevier, 2018-10)

  Structure-property relationship of the as-cast -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was examined. The phases stable at room temperature in the alloy were /a(sub)2/Ti(sub)5Si(sub)3, respectively; while their ...
• In-situ formation, anti-corrosion and hardness values of Ti-6Al-4V biomaterial with niobium via laser deposition 

  Phume, L; Popoola, API; Aigbodion, VS; Pityana, Sisa L (Inderscience, 2018)

  Ti-6Al-4V alloy biomaterials have low hardness, wear resistance, high corrosion rate and toxicity as results of release of aluminium and vanadium ions that led to the premature failure of the implant. In order to overcome ...
• Fractal light from lasers 

  Sroor, H; Naidoo, Darryl; Miller, SW; Nelson, J; Courtial, J; Forbes, A (American Physical Society, 2019-01)

  Fractals, complex shapes with structure at multiple scales, have long been observed in Nature: as symmetric fractals in plants and sea shells, and as statistical fractals in clouds, mountains and coastlines. With their ...
• Microstructural characteristics, crack frequency and diffusion kinetics of functionally graded Ti-Al composite coatings: Effects of Laser Energy Density (LED) 

  Olakanmi, EO; Sepako, M; Morake, J; Hoosain, Shaik E; Pityana, Sisa L (Springer Nature, 2018-12)

  This study examines the dependence of microstructural characteristics, crack frequency and diffusion kinetics of functionally graded (FGM) titanium aluminide coatings reinforced with TiC on laser energy density (LED). ...
• Preparation of carbon nanofibers/tubes using waste tyres pyrolysis oil and coal fly ash derived catalyst 

  Rambau, Khavharendwe MA; Musyoka, Nicholas M; Manyala, N; Ren, Jianwei; Langmi, Henrietta W; Mathe, Mahlanyane K (Taylor & Francis, 2018-05)

  In this study, two waste materials namely; coal y ash (CFA) and waste tyres pyrolysis oil, were successfully utilized in the synthesis of carbon nanofibers/tubes (CNF/Ts). In addition, Fe-rich CFA magnetic fraction (Mag-CFA) ...
• Fabrication of stainless steel based FGM by laser metal deposition 

  Bayode, A; Akinlabi, ET; Pityana, Sisa L (De Gruyter, 2018-04)

  Recent advancement in materials processing has resulted in the evolution of advance composite known as Functionally Graded Materials (FGMs). FGMs are multi-layered structures with composition and/or microstructure that ...
• Atmospheric corrosion testing in Southern Africa - Results of a twenty year national exposure programme 

  Callaghan, BG (Printed in the Republic of South Africa by Scientia Publishers, CSIR, 1991)

  Atmospheric corrosion is one the most widespread causes of metal and alloy degradation known. We only have to look at the corrosion of structural steelwork in buildings, bridges and other forms of construction to recognize ...
• The effect of specimen geometry on tensile properties of titanium alloy metal sheet 

  Masete, Mosimanegape S; Muchavi, Noluntu S; Chikosha, Silethelwe (2018-12)

  Determination of tensile properties of materials is required to reliably predict performance of engineering materials in service and for design purposes. Tensile properties are also used as a measure of product quality. ...

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