Author:Popoola, AP; Pityana, Sisa L; Ogunmuyiwa, EDate:Oct 2010Al/TiB2 metal matrix composite (MMCs) was fabricated on aluminium AA1200 with the aim of improving the wear resistance property of the substrate. The characterization of the MMCs was carried out by Optical Microscopy (OM), Scanning Electron ...Read more
Author:Vogt, D; Brink, VZ; Schutte, SDate:Sep 2009South African underground hard rock mines are typically managed using measurements made daily, weekly or even monthly of key parameters like face advance, readiness to blast, blast success, temperature or dust levels. Safety and health can ...Read more
Author:Edwards, A; Kritzinger, DDate:2011At the 2003 Mine Health and Safety Summit, the milestones for elimination of Noise-induced Hearing Loss (NIHL) in the mining industry were agreed on. The first milestone, December 2008, has passed and the next one in 2013 is looming. The study ...Read more
Author:Watson, BP; Kuijpers, JS; Henry, G; Palmer, CE; Ryder, JADate:Oct 2008Uniaxial tests performed on core from instrumented sites at Amandelbult 1 shaft, Impala 10 shaft and Union Section Spud-shaft showed a nonlinear elastic relationship between applied load and induced deformation. This nonlinear behaviour does ...Read more
Author:Tshilombo, KG; Pistorius, PCDate:2007The authors argue the possibility of using an oxygen probe to follow iron removal during converting, if local equilibrium is established between iron in the matte and the iron oxides in the fayalitic slag. The oxygen activity is expected to ...Read more
Author:Edwards, A; Dekker, JJ; Franz, RM; Van Dyk, T; Banyini, ADate:May 2011This two-year study focused on current noise exposure levels in the South African mining industry, aimed at helping the Mine Health and Safety Council of South Africa meet its milestones for eliminating noise-induced hearing loss (NIHL). A ...Read more
Author:Pereira, MFVT; Williams, M; Du Preez, WBDate:Oct 2010The difficulties and issues associated with the economics of the process and die life in casting Aluminium alloys, as experienced by the high pressure die casting industry, were reasons behind undertaking this research project. The use of a ...Read more
Author:Benson, JM; Richter, W; Chikwanda, HCDate:Oct 2010Titanium is an exciting structural material that can offer significant strength-to-weight advantages over currently used alloys. However its Achilles heel is its cost energy intensive production process that effectively eliminates it from ...Read more
Author:Benson, JM; Richter, W; Chikwanda, HCDate:Mar 2011Titanium is an exciting structural material that can offer significant strength-to-weight advantages over currently used alloys. However, its Achilles’ heel is its costly, energy-intensive production process that effectively eliminates it ...Read more
Author:Goldbach, ODDate:Sep 2009Many South African gold mines will flood when they close, as the groundwater will gradually fill the mining voids. Preliminary investigations have shown that flooding of mines can generate increased levels of seismicity. Examples are given ...Read more
Author:Kovalchik, PG; Duda, FT; Harper, GSDate:May 2009This report describes the procedure for the measurement and reporting of noise from portable pneumatic tools such as jackleg drills. The technique used in this research allows for the determination of the source A-weighted sound power levels ...Read more
Author:Mushove, T; Chikwanda, HK; Machio, Christopher N; Ndlovu, SDate:Apr 2009This paper reports the preliminary results of an investigation on the synthesis of a Ti-Mg alloy powder through mechanochemical processing of TiO2 and Mg powders. TiO2 was mixed with elemental Mg according to a nominal stoichiometric composition ...Read more
Author:Oosthuizen, SJDate:Nov 2011This paper examines innovation in relation to the availability of a new material: the metal titanium. The paper aims to highlight the need for the inclusion of entrepreneurial innovation as a necessary focus area in the development of a ...Read more
Author:Mushove, T; Chikwanda, HK; Machio, Christopher N; Ndlovu, SDate:Oct 2010Dissolution of waste by-products of mechanochemical processing (MCP) synthesis of Ti(Mg) alloy, from TiO2 and 15 wt.% excess Mg, was conducted in equimolar cysteine/ascorbic acids. The synthesized alloy is inherently mixed with MgO and other ...Read more