Author:Roro, Kittessa T; Tile, N; Yalisi, B; Forbes, ADate:May 2011For efficient photo-thermal conversion of solar energy a spectrally selective solar absorber surfaces are widely used. An ideal selective surface should have a high absorptance (low reflectance) in the solar wavelength range (0.3 to 2.5 µm) ...Read more
Author:Mokoduwe, SM; Van Rooyen, IJ; Neethling, JH; Janse van Vuuren, A; Olivier, EJDate:Oct 2010Recent research and development activities of the PBMR Fuel Characterization and Optimization Programme focused on the high temperature characteristics of the PBMR fuel and more specifically on the SiC layer. PBMR fuel consists of Tri-Isotropic ...Read more
Author:Moilwa, N; Wilkinson, MDate:Nov 2006Diarrhoeal disease is a major concern to the South Africa government. Understanding the relationship between the lack of water and sanitation and diarrhoeal disease, the government has developed a national initiative to provide poor and rural ...Read more
Author:Adeyemi, A; Botai, J; Ramoelo, Abel; van der Merwe, F; Tsela, PDate:Nov 2015The Tshwane Metropolis, Gauteng Province, South Africa, continues to experience rapid urbanization as a result of population growth. This has led to the conversion of natural lands into large man-made landscapes i.e., increase in impervious ...Read more
Author:Masina, Bathusile N; Skhosane, Besabakhe S; Tlotleng, MonnammeDate:2020The direct laser-deposited Inconel 718 (IN718) specimens were produced using 1073 nm, high power continuous wave (CW), IPG Ytterbium fibre laser and in-situ heat treatment. The laser power and in-situ heat treatment temperature were fixed ...Read more
Author:Galuszynski, S; Gee, E; Robinson, GADate:Feb 1984An all-wool, an all-polyester and a wool/polyester blend fabric were each fused at the same interlining under industrial conditions.Read more
Author:Zain, EM; Youssef, AF; Sabbagh, AEI; Pityana, Sisa L; Taha, MADate:Dec 2021Nickel Titanium alloy (Nitinol) is characterized by its good mechanical properties, good damping properties in addition to its distinctive shape-memory effect and superelasticity effect besides its great bio-mechanical compatibility and ...Read more
Author:Dada, M; Popoola, P; Mathe, Ntombizodwa R; Pityana, Sisa L; Adeosun, SDate:May 2020This preliminary study investigates the fabrication of Al-Co-Cr-Fe-Ni-Cu and Al-Ti-Cr-Fe-Co-Ni High Entropy Alloys with the Laser Deposition Technique. The effect of the laser parameters on the microstructure and hardness properties of the ...Read more
Author:Mokgalaka, MN; Pityana, Sisa L; Popoola, API; Meacock, CDate:Oct 2012Titanium is an attractive choice for many components in the aerospace, automotive and biomedical industry. It is frequently chosen as one of the preferred alloys for parts and components due to the excellent combination of specific mechanical ...Read more
Author:Mahamood, RM; Akinlabi, ET; Shukla, M; Pityana, Sisa LDate:Oct 2012This paper reports the effect of laser power on the optimum utilization of the powder material, the layer height and the width of the laser Metal Deposited Ti6Al4V. The Ti6Al4V powder was deposited on Ti6Al4V substrate using an Nd: YAG laser ...Read more
Author:Phala, MF; Popoola, API; Tlotleng, Monnamme; Pityana, Sisa LDate:2018A binary Ti-Si (1 : 1) alloy coating was fabricated on Ti-6Al-4V alloy using laser cladding technique where Neodymium yttrium aluminium garnet laser was utilised. Micro-atomised powders of Ti and Si were used for deposition of multi-track ...Read more
Author:Pretorius, JG; Desai, DA; Snedden, Glen CDate:Nov 2019Fatigue failure due to stress raiser regions on critical rotating components in gas turbine engines, such as the shaft, is a crucial aspect. Methods to reduce these stresses and improve fatigue life are a source of ongoing research. Laser ...Read more
Author:Arthur, Nana KK; Kubjane, SM; Popoola, API; Masina, Bathusile N; Pityana, Sisa LDate:May 2023Titanium alloys are prone to increased oxidation rates when exposed to higher temperatures during application. As a result, the components suffer mechanical failure due to the formation of the alpha-case layer at 500 °C. To improve its corrosion ...Read more
Author:Molatlhegi, G; Hoosain, Shaik; Popoola, API; Malatji, N; Pityana, Sisa LDate:Oct 2021Ti-6Al-4V is favourable due to its exquisite properties for example, low modulus, light weight, excellent strength, and corrosion resistance. Despite the excellent properties of the material, the fabrication process of titanium components is ...Read more
Author:Masina, Bathusile N; Akande, Amos A; Mwakikunga, Bonex WDate:Dec 2019Highly oriented VO2 (M1) thin films are difficult to produce using non-crystalline substrates. For example, to produce such films on glass has required post-annealing or the use of a ZnO transparent layer. Here, we overcome this challenge and ...Read more
Author:Kubjane, SM; Arthur, Nana KK; Masina, Bathusile N; Popoola, API; Pityana, Sisa LDate:Sep 2019Because of its low density, high corrosion resistance and high strength to weight ratio, titanium and its alloys are widely used in aerospace applications. As a result, the material is exposed to detrimental environment. An enhancement in ...Read more
Author:Molefe, DM; Labuschagne, FJFWJ; Focke, WW; Van der Westhuizen, I; Ofosu, ODate:Sep 2015Emulsion grade PVC was plasticised with 100 phr diisononyl phthalate and filled with 30 phr of different hydrated filler-type flame retardant additives. Static heat stabilities were determined at 200 oC by following the time dependance of ...Read more
Author:Pelembe, LAM; Dewar, J; Taylor, JRNDate:2002The effect of malting conditions on pearl millet malt quality in two varieties, SDMV 89004 and SDMV 91018, was investigated. Grain was steeped and germinated at four temperatures, 20degrees, 25degrees, 30degrees and 35degreesC, over 5 days. ...Read more
Author:Bolokang, AS; Phasha, MJ; Motaung, DE; Bhero, SDate:2012Cold pressing (CP) of the amorphous-like Co powder suppressed most of the XRD peaks, in particular the peak along (100) plane. The DSC curve of unmilled CP Co powder has shown a distinct sharp exothermic peak at 615◦C. Upon annealing at 700◦C, ...Read more