• Surface morphology characterisation for parts produced by the high speed selective laser melting 

  Shange, Mfanufikile; Yadroitsava, I; Pityana, Sisa L; Yadroitsev, I; Bester, Duwan C (IOP Publishing, 2019-11)

  Additive Manufacturing (AM) systems are unique in terms of fast production and lead time to market. South Africa has built the AM Laser Powder Bed Fusion (LPBF) machine called Aeroswift with the world's largest build volume ...
• Effect of powder bed preheating on distortion and mechanical properties in high speed selective laser melting 

  Motibane, Londiwe P; Tshabalala, Lerato C; Mathe, Ntombizodwa R; Hoosain, Shaik E; Knutsen, RD (IOP Publishing, 2019-10)

  Selective Laser Melting (SLM) is known to cause residual stresses due to the inherent large thermal gradients from high heating and cooling rates during manufacturing. The residual stresses tend to induce distortion, ...
• Influence of stress relieving thermal cycles on AISI10 Mgspecimens produced by selective laser melting 

  Mfusi, Busisiwe J; Mathe, Ntombizodwa R; Popoola, Patricia A; Tshabalala, Lerato C (CoSAami, 2019-10)

  The AlSi10Mg alloy is known for its castability, corrosion resistance, high heat conductivity, low weight and good weldability. The applications of the aluminium alloy components includes heat exchangers that are subjected ...
• Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment 

  Lekoadi, Paul M; Tlotleng, Monnamme; Maledi, N; Masina, Bathusile N (RAPDASA, 2019-11)

  Selective laser melting (SLM) is a powder bed additive manufacturing technique that produces components layerby-layer from computer aided designs as opposed to conventional manufacturing methods. Although this manufacturing ...
• The validation of the microstructural evolution of selective laser-melted AlSi10Mg on the in-house built machine: Energy density studies 

  Mathe, Ntombizodwa E; Tshabalala, Lerato C (Springer, 2019-12)

  The additive manufacturing of aluminium alloys has become an area of interest for the aerospace industry due to the high strength-to-weight ratios of the produced components. AlSi10Mg has been explored as an alloy of choice ...
• Synthesis of radially aligned nano-rutile modified with Au and Ni for the photodegradation of methyl orange 

  Dziike, F; Franklyn, PJ; Durbach, SH; Maubane, M; Hlekelele, Lerato (Elsevier, 2018-08)

  Radially aligned nano-rutile (RANR) was synthesized using the hydrothermal technique. The RANR structure was formed by the radial aggregation of nanorods with an average width of 9 nm. The radii of RANR ranged between ...
• Microstructural Properties of Heat-Treated LENS In Situ Additively Manufactured Titanium Aluminide 

  Tlotleng, Monnamme (Springer, 2019-02)

  This study reports on the microstructure, phase identification and hardness property of the LENS-manufactured binary Ti-Al alloy which was achieved via laser in situ alloying. The in situ alloying method, using laser beam ...
• Layer-wise powder deposition defect detection in additive manufacturing 

  Hendriks, Adriaan J; Ramokolo, Lesiba R; Ngobeni, Christopher M; Moroko, Matome C; Naidoo, Darryl (SPIE, 2019-03)

  Additive manufacturing applications, in areas such as aerospace and medicine, are limited due to the lack of process stability and quality management. In particular, geometrical inaccuracies and the presence of mechanical ...
• Amplification of higher-order Poincaré sphere beams 

  Naidoo, Darryl; Sroor, H; Litvin, I; Forbes, A (SPIE, 2019-09)

  The Higher order Poincar´e sphere (HOPS) is generally used to describe scalar and vector orbital angular momentum modes. These modes have found many applications to date; however, they are limited to low power levels. It ...
• 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 ...

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