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Browsing by Subject "SEM"

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Anodising of Al-Mg-Si-(Cu) alloys produced by R-HPDC

Author: Chauke, L ; Möller, H ; Curle, UA ; Govender, G Date: Jul 2013 Anodising of aluminium alloys can be used to improve corrosion resistance during application or it can be simply for decorative purposes. In this research, anodising of 6111 (Cu containing) and 6082 (without Cu) alloys produced by Rheo-High ... Read more
Applying the Theory of Planned Behavior to recycling behavior in South Africa

Author: Strydom, Wilma F Date: Sep 2018 This paper reports on an application of the Theory of Planned Behavior to understand the relationships between the determinants (latent variables) comprising the Theory of Planned Behavior and, based on these findings, to guide decision-making ... Read more
The comparative study of the microstructural and corrosion behaviour of laser-deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S ; Aramide, O Date: Jun 2021 Corrosion is a conservational occurrence that has a large economic impact on most metals and its alloys because it destroys and deteriorates most materials by an electrochemical process through the reaction of these materials with the ... Read more
Distribution of nanoclay in a new TPV/nanoclay composite prepared through dynamic vulcanization

Author: Dutta, S ; Sengupta, S ; Chanda, J ; Das, A ; Wiessner, S ; Ray, Suprakas S ; Bandyopadhyay, A Date: Mar 2020 In this article distribution of nanoclay between the two phases of a new class of dynamically vulcanized TPV based on POE/EVA(Polyethylene octene elastomer/ethylene vinyl acetate copolymer) elastomers prepared with various amounts of organoclay ... Read more
Effects of stearic acid and irradiation alone and in combination on properties of amylose-lipid nanomaterial from high amylose maize starch

Author: Ocloo, FCK ; Ray, Suprakas S ; Emmambux, NM Date: May 2019 This study determines the effects of stearic acid and gamma irradiation, alone and in combination, on properties of amylose-lipid nanomaterials from pasted high amylose maize starch (HAMS) with and without alpha amylase hydrolysis. HAMS was ... Read more
Electrospun chitosan nanofibre membranes for antimicrobial application: role of electrospinning processing parameters

Author: Jacobs, V ; Patanaik, A ; Anandjiwala, RD Date: 2010 Electrospinning is a straightforward and versatile technique for fabrication of nanofibres from a variety of polymer solutions.Nanofibers with high surface area to volume ratio, high porosity and small fiber diameter make them ideal materials ... Read more
Evaluation of chitosan/sisal fiber/polyethylene membranes

Author: Agboola, O ; Fayomi, OSI ; Sadiku, ER ; Ayoola, A ; Mokrani, T ; Mbuli, BS ; Popoola, P ; Perry, Goitseona S Date: Jul 2020 Composites of ternary blend of chitosan/sisal fiber/high density polyethylene, were prepared by using the Rheomixer, followed by hot press, in order to form dense microfiltration membranes. The effective operation of the membranes was tested ... Read more
Inkjet-printed silver tracks on different paper substrates

Author: Joubert, T-H ; Bezuidenhout, PH ; Chen, H ; Smith, S ; Land, K Date: Aug 2015 Inkjet printing is a widely used patterning method in industrial and scientific applications, and has also drawn attention in the field of printed electronics in recent years [1]. In this work, conductive silver tracks were achieved by inkjet ... Read more
Kenaf fiber-reinforced copolyester biocomposites

Author: Mokhothu, Thabang H ; Guduri, BR ; Luyt, AS Date: Dec 2011 In this study the morphology and properties of a biodegradable aliphatic–aromatic copolyester mixed with kenaf fiber were investigated. Untreated kenaf fiber, as well as kenaf fiber treated with NaOH, and with NaOH followed by silane coupling ... Read more
Laser surface alloying of 316L stainless steel with Ru and Ni mixtures

Author: Lekala, MB ; Van der Merwe, JW ; Pityana, Sisa L Date: May 2012 The surfaces of AISI 316L stainless steel were laser alloyed with ruthenium powder and a mixture of ruthenium and nickel powders using a cw Nd:YAG laser set at fixed operating parameters. The microstructure, elemental composition, and corrosion ... Read more
Low temperature molten salt synthesis of Y(sub2)Sn(sub2)O(sub7) anode material for lithium ion batteries

Author: Nithyadharseni, P ; Reddy, MV ; Ozoemena, KI ; Balakrishna, RG ; Chowdari, BVR Date: Oct 2015 For the first time, yttrium tin oxide (Y(sub2)Sn(sub2)O(sub7)) compound is prepared at low temperature (400 _C) with cubic pyrochlore structure via molten salt method using KOH as a flux for their electrochemical applications. The final product ... Read more
Microstructural pavement material characterization: some examples

Author: Mgangira, Martin B Date: Jul 2008 The utilisation of advanced measurement techniques should assist in the characterization of pavement materials at a micro-scale. The motivating factor for such an approach is that material properties at the micro-level have a critical role ... Read more
Microstructures of alloyed and dispersed hard particles in the aluminium surface

Author: Pityana, Sisa L Date: Mar 2010 Laser 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
Morphological and chemical composition characterization of commercial sepia melanin

Author: Mbonyiryivuze, A ; Nuru, ZY ; Ngom, BD ; Mwakikunga, Bonex W ; Dhlamini, SM ; Park, E ; Maaza, M Date: Jun 2015 Melanins are difficult to characterize because of their intractable chemical properties and the heterogeneity in their structural features. Melanin pigments, in fact, are composed of many different types of monomeric units that are connected ... Read more
Nanocauliflower like structure of CdS thin film for solar cell photovoltaic applications: Insitu tin doping by chemical bath deposition technique

Author: Wilson, KC ; Manikandan, E ; Basheer Ahamed, M ; Mwakikunga, Bonex W Date: 2014 We 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
Natural fabric of Hildegardia populifolia composites

Author: Guduri, BBR Date: Dec 2006 The influence of Hildegardia populofolia fabric content, fabric orientation, sodium hydroxide (NaOH) and silane coupling agent treatment on the surface properties of the fabric, mechanical and fracture properties of Hildegardia populifolia- ... Read more
The stability of Ag and ZnO engineered nanoparticles in Hoagland's nutrient water: the role of particle size and morphology

Author: Radebe, N ; Thwala, Melusi ; Cele, LM ; Sikhwivhilu, L ; Musee, N ; Shumbula, P Date: Aug 2013 The 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
A study of solvent debinding variables on Ti6Al4V green bodies

Author: Seerane, M ; Chikwanda, H ; Focke, W ; Machaka, Ronald Date: Oct 2014 Debinding is one of the most critical and time consuming stage in metal injection moulding (MIM). German and Bose (1997) reported that early debinding practice relied on thermal binder degradation, requiring up to 300 hours for complete binder ... Read more
Synthesis of single walled carbon nanotubes by dual laser vaporization

Author: Moodley, MK et al. Date: 27 Feb 2006 Single-walled carbon nanotubes were synthesised by the laser vaporisation of graphite composite targets in a tube furnace. Two pulsed Nd:YAG lasers operating at fundamental (1 064 nm) and 2nd harmonic (532 nm) were combined, focused and ... Read more
Synthesis, characterization, and growth mechanism of α-Cr2O3 monodispersed particles

Author: Khamlich, S ; Manikandan, E ; Ngoma, BD ; Sithole, J ; Nemraoui, O ; Zorkani, I ; McCrindle, R ; Cingo, N ; Maaza, M Date: Jun 2011 Monodispersed spherical particles of chromium (III) oxide, α-Cr2O3, were successfully synthesized from a diluted solution of KCr(SO4)2·12H2O using the Aqueous Chemical Growth (ACG) technique. The spherical α-Cr2O3 particles obtained were ... Read more

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