Author:Raji, SA; Popoola, API; Pityana, Sisa L; Monnamme, TlotlengDate:Mar 2021Intermetallics based on gamma titanium aluminide ( -TiAl) alloys are potential lightweight materials that can be used for high-temperature components. However, poor room temperature ductility hinders their full potential for producing components ...Read more
Author:Tlotleng, Monnamme; Makoana, Nkutwane W; Pityana, Sisa L; Masina, Bathusile NDate:Nov 2016It is difficult to produce titanium aluminides (TiAl) components because these materials lack ductility and when used as high temperature structures they fail prematurely due to the inability to self-oxidise. In this study, a 20 by 20 mm cube ...Read more
Author:Madikezela, C; Cornish, LA; Chown, LH; Moller, HDate:Feb 2019Beta Ti-alloys are known for their high fracture toughness and ductility, and are used in applications where these properties are needed, such as the aerospace and biomedical industries. The selective laser melting of the alpha + beta Ti-6Al-4V ...Read more
Author:Raganya, Mampai L; Moshokoa, Nthabiseng A; Obadele, B; Makhatha, E; Machaka, RonaldDate:Jun 2021The aim of this study is to investigate the effect of niobium on the microstructure and mechanical properties of Ti-Mo-Nb alloys, which include Ti-11.1Mo-10.8Nb (TMN1), Ti-10.2Mo-19.5Nb (TMN2), and Ti-9.2Mo-26.7Nb (TMN3) alloys designed using ...Read more
Author:Sibisi, PN; Popoola, API; Kanyane, LR; Fatoba, OS; Adesina, OS; Arthur, Nana KK; Pityana, Sisa LDate:Mar 2019Failure of engineering components on application is mainly a result of poor surface behavior of materials under certain conditions. Titanium and its alloys have numerous beneficial properties including light weight, high strength and excellent ...Read more
Author:Bolokang, AS; Phasha, MJ; Motaung, DE; Cummings, FR; Muller, TFG; Arendse, CJDate:Oct 2014Water quenching of unmilled Ti compact has yielded martensitic-type laths and fishbone-type twinned microstructures, with a', a'' and FCC phases induced. Upon quenching 30 h milled and (0+30) h mixed powders at 1200 °C, a', FCC, tetragonal ...Read more
Author:Aramide, B; Sadiku, R; Popoola, P; Pityana, Sisa L; Jamiru, TDate:Jan 2022The enhancement of wear performance of steel baseplate for tillage application was carried out by manufacturing vanadium-chromium carbide coatings in situ by powder infusion of high carbon ferrochrome FeCrV15 powder through laser additive ...Read more
Author:Ochonogor, OF; Meacock, C; Pityana, Sisa L; Popoola, PAI; Dutta Majumder, JDate:Sep 2012Laser metal deposition (LMD) is an additive manufacturing technique whereby a stream of metal powder is consolidated by a focused laser beam on the surface of a substrate or engineering component. The interaction zone between the laser beam ...Read more
Author:Davoren, B; Sacks, N; Theron, MarithaDate:Jun 2021To assess if a WC-9.2wt%Monel 400 alloy properties could be improved using LENS, one alloy was deposited onto a heated substrate and a second alloy was subjected to laser remelting of the final deposited layer. Microstructural characterization ...Read more
Author:Banerjee, R; Ray, Suprakas S; Ghosh, AKDate:Apr 2018The present work is a novel attempt to understand the microstructure of styrene-ethylene-butylene-styrene (SEBS)/polystyrene (PS) blends not only through morphological studies, but also thermal, mechanical and rheological characterizations. ...Read more
Author:Tlotleng, Monnamme; Akinlabi, E; Shukla, M; Pityana, Sisa LDate:Oct 2014Hydroxyapatite (HAP) coatings on bioinert metals such as Ti–6Al–4V are necessary for biomedical applications. Together, HAP and Ti–6Al–4V are biocompatible and bioactive. The challenges of depositing HAP on Ti–6Al–4V with traditional thermal ...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:Rohwer, Mark B; Modibedi, Remegia M; Ozoemena, KIDate:Feb 2015The impact of microwave irradiation on the structure and electrochemistry of monodispersed palladium nanoparticles is reported for the first time. When compared to the Pd that was not subjected to microwave treatment, the microwaved Pd ...Read more
Author:Adams, D; Malgas, GF; Smith, RD; Massia, SP; Alford, TL; Mayer, JWDate:Nov 2006A sol was spun on single crystal silicon substrates at a spin-rate of 3000–5000 rpm followed by a low temperature cure to form a stable sol–gel/ silicon structure. Good quality crystalline HA films of thickness ~300–400 nm were obtained by ...Read more
Author:Botha, GE; Oliveira, JC; Ahrné, LDate:Jan 2012Variable power programmes for microwave assisted air drying of pineapple were studied. The pineapple pieces were pre-treated by osmotic dehydration in a 55º Brix sucrose solution at 40ºC for 90 minutes. Variable power output programmes were ...Read more
Author:Jafta, CJ; Raju, Kumar; Mathe, Mahlanyane K; Manyala, N; Ozoemena, KIDate:Feb 2015A hybrid synthesis procedure, combining microwave irradiation and conventional annealing process, is described for the preparation of lithium-rich manganese-rich cathode materials, Li[Li0.2Mn0.54Ni0.13Co0.13]O2 (LMNC) and its aluminum-doped ...Read more
Author:Makgabutlane, B; Nthunya, LN; Nxumalo, EN; Musyoka, Nicholas M; Mhlanga, SDDate:Sep 2020Class F South African coal fly ash was used as a precursor for the synthesis of zeolite A via complete microwave irradiation. To attain optimal conditions for the synthesis of zeolite A with minimum impurities, the microwave synthesis time, ...Read more