Browsing Research Articles (Materials Science and Metallurgical Engineering) by UP Author "De Villiers, J.P.R. (Johan)"
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Browsing Research Articles (Materials Science and Metallurgical Engineering) by UP Author "De Villiers, J.P.R. (Johan)"
Now showing items 1-12 of 12
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Hancke, J.J.; Van Rooyen, Gerrit T.; De Villiers, J.P.R. (Johan) (American Nuclear Society, 2013-04)The crushing strength (load at fracture) of coated particles was measured by compression between soft metal anvils. The method requires no sample preparation and can be used as a quality control method as well as a valuable ...
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De Villiers, J.P.R. (Johan); Mulange, Delphin; Garbers-Craig, Andrie Mariana (MDPI, 2020-03)Please read abstract in the article.
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De Villiers, J.P.R. (Johan) (Mineralogical Society of America, 2017-10)The sustainability of a mineral resource depends, among other aspects, on what the mineral in question will be used for, price fluctuations, future resource requirements, and downstream manufacturing. A balance must be ...
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Swanepoel, Stefan; Garbers-Craig, Andrie Mariana; De Villiers, J.P.R. (Johan) (Springer, 2022-12)Please read abstract in the article.
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Pistorius, Petrus Christiaan; De Villiers, J.P.R. (Johan); Graser, Peter; Venter, A. (Maney Publishing, 2012-04)Within ilmenite smelters, the slag is at a temperature just above its liquidus (because the furnace operates with a slag freeze lining), and the metal bath is at a temperature which is approximately 150°C lower than the ...
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Bezuidenhout, Gert Adrian; Eksteen, J.J.; Akdogan, G.; Bradshaw, S.M.; De Villiers, J.P.R. (Johan) (Elsevier, 2013-11)The production of Platinum Group Metals (PGMs) normally entails the smelting of PGM flotation concentrates, converting of the furnace matte and removal of the bulk of the Ni, Cu, Co, S and Fe through atmospheric and ...
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Liles, David C.; De Villiers, J.P.R. (Johan); Kahlenberg, Volker (Springer, 2016-02)Crystals of a silico-ferrite of calcium and aluminium (SFCA) and an Al-free SFC were prepared from the melt by slow cooling of synthetically prepared mixtures and examined by single-crystal diffraction methods. Both ...
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Du Plessis, H.E.; De Villiers, J.P.R. (Johan); Kruger, Gert J.; Steuwer, A.; Brunelli, M. (Wiley, 2011-03)Fischer-Tropsch (FT) synthesis is an important process in the manufacturing of hydrocarbons and oxygenated hydrocarbons from mixtures of carbon monoxide and hydrogen (syngas). The reduced iron catalyst reacts with carbon ...
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Xaba, B.M.; De Villiers, J.P.R. (Johan) (American Chemical Society, 2016-09)The sintering of model TiO2-supported cobalt catalysts has been studied. The TiO2 supports used were anatase, P25 (85% anatase-15% rutile) and rutile. The catalysts were characterized at each stage of treatment. ...
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Ngoepe, Noko Nepo; De Villiers, J.P.R. (Johan) (Elsevier, 2013-07)The lattice parameter change of SiC in TRISO particles prepared by chemical vapour deposition (CVD) was measured using high temperature X-ray diffraction, across a temperature range of 25–1400 C. Al2O3 was used as the ...
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Van den Berg, Teresa; De Villiers, J.P.R. (Johan); Cromarty, Robert Douglas (Elsevier, 2016-05)The oxygen potential prevailing during iron ore sintering wasmeasuredwith a zirconia sensor in a series of sinter pot experiments. Thiswas done to get a better indication of the redox conditions during commercial sintering. ...
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Hejny, Clivia; Kahlenberg, Volker; Schmidmair, Daniela; Tribus, Martina; De Villiers, J.P.R. (Johan) (Elsevier, 2016-09)The crystal structures of unknown phases found in slags from the production of low-carbon ferrochromium were studied by powder and single-crystal X-ray diffraction. Two phases of Na2−δ (Al, Mg, Cr)17O25 composition were ...
Now showing items 1-12 of 12