Author:Scriba, Manfred R; Britton, DT; Arendse, C; van Staden, MJ; Härting, MDate:Apr 2009The effect of pressure on the structure and composition of silicon nanoparticles synthesized by hot wire thermal catalytic pyrolysis (HW-TCP) of pure silane has been investigated. Light brown powders were produced at silane pressures of 10 ...Read more
Author:Prins, SN; Cornish, LA; Boucher, PSDate:10 Nov 2005The liquidus surface projection for the Al-Pt-Ru ternary system has been determined based on the micro-structural characterisation of arc-melted alloys. The liquidus surface is dominated by the similarity to RuAl phase, and slopes down to the ...Read more
Author:Mothosi, KL; Chikosha, Silethelwe; Madyira, DM; Chikwanda, Hilda KDate:Jan 2017Manufacturing processes typically produce residual stresses. The residual stresses can be advantageous when they are compressive and detrimental when tensile. In roll compaction of metal powder, similarly to rolling solid metals, substantial ...Read more
Author:Motshekga, SC; Kesavan Pillai, Sreejarani; Ray, SS; Jalama, K; Krause, RWMDate:Nov 2011Tin oxide (SnO2) - decorated carbon nanotube (CNT) heterostructures were synthesized by microwave assisted wet impregnation method. CNTs of three different aspect ratios were compared. The hybrid samples were characterized by powder X-ray ...Read more
Author:Bolokang, AS; Phasha, MJ; Camagu, ST; Motaung, DE; Bhero, SDate:Mar 2012Stabilization of the metastable FCC phase has been achieved after 10 h milled Co powder sintering at 1400 °C. Phase identification of the Co powders was performed by the X-ray diffraction analysis, while the microstructural analyses were ...Read more
Author:Maepa, CE; Jayaramudu, J; Okonkwo, O; Ray, SS; Sadiku, ER; Ramontja, JDate:Apr 2015This article reports on the extraction and characterization of novel natural cellulose fibers obtained from the maize (tassel) plant. Cellulose was extracted from the agricultural residue (waste biomaterial) of maize tassel. The maize tassel ...Read more
Author:Mutombo, K; Kgomo, C; Rossouw, PDate:Oct 2014The interaction between the Ti6Al4V alloy and the mould materials was investigated. The alpha-case was characterized by Vickers hardness tester, optical and scanning electron microscopy equipped with electron dispersive X-ray spectrometry ...Read more
Author:Gaigher, JLDate:1977This report deals with the reactivity of mineral matter prepared from coal by the radio-frequency oxidation method, with the using X-ray diffraction to detect mineral phase changes, and possible react ion mechanisms.Read more
Author:Pityana, Sisa L; Rossouw, RDate:Oct 2008The aim of this work was to produce crack-free thin surface layers consisting of binary (Al-Ni, Al-Fe) and ternary (Al-Ni-Fe) intermetallic phases by means of a high power laser beam. The laser surface alloying was carried out by melting Fe ...Read more
Author:Pityana, Sisa LDate:Mar 2010Laser surface alloying of A1200 aluminium alloy was carried out using a 4.4 kW Nd:YAG laser. Powder mixtures of SiC and TiC hard particles were injected into the laser generated melt pool on the aluminium substrate using a commercial powder ...Read more
Author:Chakraborty, A; Singh, JK; Sen, D; Pityana, Sisa L; Manna, I; Krishna, S; Dutta Majumdar, JDate:Sep 2020This study aims at the development of composite surface on austenitic stainless (AISI 304 stainless steel) by laser surface alloying with WC and Co in the weight ratio of 4:1. Laser processing has been carried out by laser melting of sandblasted ...Read more
Author:Wilson, KC; Manikandan, E; Basheer Ahamed, M; Mwakikunga, Bonex WDate:2014We report on surface morphology changes of in situ tin (Sn) doped cadmium sulphide (CdS) thin film nanostructures prepared on a glass substrate using the chemical bath deposition (CBD) technique. Sn-doping in the presence of triethanolammine ...Read more
Author:Copeman, JH; Von Wolff, WTEDate:1968When certain component, in a mixture with other components, has to be determined in a sample, one cannot directly compare line intensities of the pure component, proposed under identical conditions as the sample, because of the absorption ...Read more
Author:Leyland, RC; Verryn, S; Momayez, MDate:Sep 2014In terms of aerial extent, basic igneous rocks are one of the most used road building materials in South Africa. This is mainly due to the fact that approximately 57% of the surface lithology in South Africa is of poor road construction ...Read more
Author:Barkenhuysen, FA; Van Rensburg, NJJDate:Jul 1984The modification of the structure of bleached cotton treated in yarn from with anhydrous liquid ammonia and liquid ammonia containing as much as 15% water was determined with the aid of iodine and moisture absorption tests, X-ray diffraction ...Read more
Author:Ojuri, OO; Shai, Jonas; Aderibigbe, ADDate:Jan 2017The characterization of the Nigerian Igbokoda Standard Sand was performed by X-ray diffraction, IR and Raman Spectroscopy, and nuclear magnetic resonance techniques. The principal reflections occurring at the d-Spacings of 4.25745, 3.34359, ...Read more
Author:Radebe, N; Thwala, Melusi; Cele, LM; Sikhwivhilu, L; Musee, N; Shumbula, PDate:Aug 2013The current study seeks to investigate the dissolution dynamics of silver (nAg) and zinc oxide (nZnO) engineered nanoparticles (ENPs), and how this affects their uptake by aquatic higher plants. First, the influence of particle size and ...Read more