Vol 40 No 1 (2021) | Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i>

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Published: 2022-02-10

Articles

Litium-ontginning uit Zimbabwiese petaliet met behulp van ammoniumbifluoried Lithium extraction from Zimbabwean petalite using ammonium bifluoride

K T Mwepu, S J Lubbe, P L Crouse

1-11
- Afrikaans
- English
Goue jubileum van metrisering: 50 jaar sedert die jaart Golden jubilee of metrication: 50 years since the yard

Cobus Vermeulen, Jannie Rossouw

12-19
- Afrikaans
Assessering van die onkruidspektrum en assosiasies daarvan met onderdrukkende verbouingstrategieë op George Assessment of the weed spectrum and its associations with suppressive cultivation strategies on George:

Michael Ignatius Ferreira, Marieta van der Rijst

20-30
- Afrikaans
Oplosmiddelvrye-transformasie van bensielalkohol na bensaldehied oor koper- en sink-gemodifiseerde fosfomolibdeensuur-katalisators by kamertemperatuur Solvent free transformation of benzyl alcohol to benzaldehyde over copper and zinc modified phosphomolybdic acid catalysts at room temperature

Jhansi Pedada, Holger B Friedrich, Sooboo Singh

31-36
- Afrikaans
- English
Bepalers van watersekuriteit vir landelike huishoudings: Empiriese bewyse uit die Melanien Hamburg-gemeenskappe, Oos-Kaap, Suid-Afrika Determinants of water security for rural households: Empirical evidence from Melani and Hamburg communities, Eastern Cape, South Africa

Thulani Ningi, Amon Taruvinga, Leocadia Zhou, Saul Ngarava

37-49
- Afrikaans
- English
Heuningbos (Cyclopia spp.) volwasse embrioweefselkultuur en die effek van peulposisie op saadkleur Honeybush (Cyclopia spp.) mature embryo culture and the influence of pod position on seed colour

Jenifer Koen, Martha M Slabbert, Mardé Booyse, Cecilia Bester

50-58
- Afrikaans
- English
Ontwikkeling van differensiële aandrywing met haptiese gebruikersterugvoer Development of a user haptic feedback differential drive

Franck Junior Boukila, Nico Steyn, Karim Djouani

59-74
- Afrikaans
- English
Benadeel konvensionele grondbewerkingspraktyke die biodiversiteit in wingerdgronde? Do conventional soil management practices harm biodiversity in vineyard soils?

Adriaan J Reinecke, Sophié A Reinecke

75-84
- Afrikaans
’n Ondersoek na die opname van sink deur Chrysopogon zizanioides uit gekontamineerde oppervlakwater

Lesley Keay, Victor Wepener, Cornelius T Wolmarans

85-93
- Afrikaans
Wiskundige modellering van die prestasiekoëffisiënt van ’n direkte-uitbreiding grootmaatmelkverkoeler op ’n plaas: ’n Veelvoudige lineêre regressie-benadering Mathematical modelling of the coefficient of performance of an on-farm direct expansion bulk milk cooler: A multiple linear regression approach

Russel Mhundwa, Michael Simon

94-102
- Afrikaans
- English
Kraakvorming in plastiese vars beton Cracking in plastic fresh concrete

Daniël M Meyer, Riaan Combrinck

103-113
- Afrikaans
Mobiele toerusting wat die suksesvolle vervoer van intermodale standaardhouers per spoor ondersteun Mobile equipment that supports the successful transportation of standard intermodal containers by rail

Wessel J Pienaar

114-126
- Afrikaans
Evaluering van Saamgestelde- en Standaardslytvaste plate op Laaibakke van Hidrouliese Voorlaaiers in Platinummyne Evaluation of Composite and Standard Liner Plates on Hydraulic Face Shovels Operating in Platinum Mines

Witske Le Roux, Tamba Jamiru, Lodewyk Willem Beneke, Taoreed Adesola Adegbola

127-139
- Afrikaans
- English
Kaapstad: ’n Slimstad vir sosio-ekonomiese ontwikkeling in Afrika Cape Town: A Smart City for African Socio-Economic Development

Alvin Ngoni Arnardu, Errol Francke

140-148
- Afrikaans
- English
’n Bestekopname van slimhuistegnologie vir sekuriteitsdoeleindes in Suid-Afrika An overview of smart-home technology for security purposes in South Africa

Burgert A Senekal

149-161
- Afrikaans
Eierattribute en broeilingmassa as voorspellers van broeilinggroei op ’n Nylkrokodilplaas (Crocodylus niloticus-plaas) Egg attributes and hatchling mass as predictors of hatchling growth on a Nile crocodile (Crocodylus niloticus) farm

Johan Oliviette Nöthling, Riaan Crafford, Jaco Theron, Johan A Nöthling

162-175
- Afrikaans
- English

Conference of the South African Advanced Materials Initiative

Effect of hot rolling parameters on recovery mechanism in 436 (17%Cr, Nb-Mo) ferritic stainless steel

M Salojee, K A Annan, C W Siyasiya, J Moema

1-7
- PDF
Empirical Force Field Derivation and Implementation for LiMO2 (M: Ni, Mn, Co) Cathode Materials

N Tsebesebe, K Kgatwane, P Ngoepe, R Ledwaba

8-11
- PDF
First-principles study on structural, mechanical and electronic properties of Li7La3Zr2O12 solid electrolyte

R Maphoto, M Masedi, P Ngoepe, R Ledwaba

12-15
- PDF
Computational fluid dynamics evaluation of conditions before impact of particles in plasma spraying process

K J Mbwebwe, A Kolesnikov, I J Van Der Walt, H Bissett

16-21
- PDF
The effect of niobium doping on lithium manganese oxide surfaces, LiMn2-xNbxO4: DFT study

B Ramogayana, K P Maenetja, P E Ngoepe

22-26
- PDF
Formation of garnet-type Li7La3Zr2O12 nanoparticles as an alternative structural stabilization route

R S Ledwaba, P E Ngoepe

27-30
- PDF
The effect of titanium slag on the properties of glass-ceramic composites from South African coal fly ash

A Modiga, A Mwamba

31-36
- PDF
Determination of the dominant failure mechanism of P92 steam piping subjected to daily operational cycle using finite element (FE) technique

S Salifu, D Desai, S Kok

37-43
- PDF
Study of wear performance of wheel and rail steels under dry sliding conditions

T P Leso, C W Siyasiya, R J Mostert, J Moema

44-50
- PDF
Prediction of austenite grain growth during austenitization of a 0.7%C pearlitic rail steel

S Khanyema, K A Annan, R J Mostert, C W Siyasiya, J Moema

51-55
- PDF
Computational modelling studies for high temperature monazite systems

L Motsomone, R G Diale, P E Ngoepe, R Koen, H R Chauke

56-59
- PDF
Effects of substrate heating on the microstructure and hardness of TiB/Ti6Al4V-ELI during laser in-situ metal deposition

P M Lekoadi, M Tlotleng, B N Masina

60-65
- PDF
The effect of hydrothermal grown zinc oxide nanoparticles as seeds on the properties of nanoripples in zinc oxide thin films

M Seabi, T Muller, S Bolokang, F Cummings, C Arendse

66-69
- PDF
In-situ synthesis of TiC/Ti-6Al-4V-ELI composite by laser

P Ramasobane, P M Mashinini, B Masina

70-74
- PDF
The effect of doping with pt impurity on ti clusters: a density functional theory study

T M Phaahla, P E Ngoepe, R A Catlow, H R Chauke

75-78
- PDF
Reduction of copper oxide powder by an inductively coupled thermal plasma

H Bissett, M Makhofane, S Lötter

79-83
- PDF
Thermo-mechanical processing and phase analysis of titanium alloys with copper additions

K D Ukabhai, K T Nape, L Spotose, M Mavundla, I A Mwamba, M O Bodunrin, L H Chown, L H Cornish

84-90
- PDF
Influence of Mo on microstructure and nanoindentation hardness of Ti-Al-Si-xMo alloy processed by Laser Engineered Net Shaping (LENS)

S A Raji, A P I Popoola, S L Pityana, O M Popoola, N K K Arthur, M Tlotleng

91-97
- PDF
Structural and stability of B2 FeCo1-XVX and Fe1-XCoVX systems: Cluster expansion approach

T M Ledwaba, R G Diale, P E Ngoepe, H R Chauke

98-101
- PDF
Study of one-step and two-step quench and partition heat treatments on a medium carbon high silicon alloy using dilatometry

V Kurup, C W Siyasiya, R J Mostert, J Moema

102-107
- PDF
Reconditioning of ti6al4v powder through an inductively coupled plasma for direct metal laser sintering

N Nkhasi, W Du Preez, H Bissett

108-112
- PDF
Characterisation of Spheroidised tungsten carbide metco 32c powder using radio frequency plasma

R M Dire, H Bissett, D Delport, K Premlall

113-117
- PDF
Density functional theory study of MnO2, TiO2 and VO2

K P Maenetja, H R Chauke, P E Ngoepe

118-120
- PDF
Bio-based polyurethane coating synthesized from modified castor oil - applicable in base coat of automobile paint

D Mohanty, M K Kanny, S Mohanty, S K Nayak

121-125
- PDF
Induction melting of an Al-50Cu alloy for improved homogeneity required for powder spheroidisation

R van der Merwe, H Bissett, I J Van Der Walt, L A Cornish

126-132
- PDF
Structural and electronic properties of β-MnO2 employing DFTB technique

P Ngobeni, P E Ngoepe, K P Maenetja

133-136
- PDF
Effects of combined alkali treatment and clay nanoparticle infusion on thermo-mechanical response of kenaf/PLA biocomposites

M Moyo, K Kanny, T P Mohan

137-141
- PDF
The influence of austenitization time and temperature on the austenite grain growth in high Ti-V HSLA steels

S R J Rezaei, C W Siyasiya, Z Tang, J Moema

142-149
- PDF
First principles study of phase stability and elastic properties of Ti94Mo6-xZrx (where x: 2 ≤ x ≥ 5) for biomaterials

V C Mnisi, M E Sithole, R Modiba

150-153
- PDF
Modelling and simulation of the fatigue usage factor of γ-TiAl alloy fabricated through Laser Additive Manufacturing (LAM)

S A Raji, A P I Popoola, S L Pityana, O M Popoola, N K K Arthur, M Tlotleng

154-161
- PDF
Use of attenuated total reflectance fourier transform infrared spectroscopy as a tool to determine effect of hot air-drying on yield (%) of chitin from crab integument

T Khumalo, A V Rane, M T Pandurangan, K Kanny

162-167
- PDF
Towards predicting process parameters for selective laser melting of titanium alloys through the modelling of melt pool characteristics

T van Rhijn, W Du Preez, M Maringa, D Kouprianoff

168-173
- PDF
Using site occupation disorder to build bulk structures of Ni1-xAlx

C J Thesner, A Falch, C G C E van Sittert

174-179
- PDF
Effect of different simulated metal dusting environments on austenitic Alloys 602CA and 800

F M L Mulaudzi, L A Cornish, G A Slabbert, S J Moema, M J Papo

180-185
- PDF
The effect of laser surface re-melting on the surface roughness and micro-hardness of selective laser melting (SLM) fabricated Ti-6Al-4V samples

G Molatlhegi, S Hoosain, A P I Popoola, N Malatji, S Pityana

186-189
- PDF
A case for establishment of the Ferrous Materials Development Network (FMDN) in South Africa

M Phasha, J Moema, J Papo

190-199
- PDF
Adsorption-desorption of F2 diatomic molecule on Ti (100) surface at different coverages

D M Tshwane, R Modiba, G Govender, P E Ngoepe, H R Chauke

200-204
- PDF
First-principles study to explore the possibility of inducing martensitic transformation in ordered B2 TiRu phase by alloying with Pd

B S Ngobe, M J Phasha, I A Mwamba

205-211
- PDF
Microstructural influences on the damage evolution and kinetics of high temperature hydrogen attack in a C-0.5 Mo welded joint

C C Pretorius, R J Mostert, T W Mukarati, V M Mathoho

212-223
- PDF
Investigating the electronic and magnetic properties of Dy, Y and La by site substitution on Nd2Fe14B permanent magnet employing the first-principle approach

L E Miya, M E Sithole, R Modiba

224-227
- PDF
Use of first principles and Thermo-Calc to identify potential low elastic modulus titanium-based alloys for biomedical applications

M N Madigoe, R Modiba, L A Cornish

228-233
- PDF
Reconditioning of Ti6Al4V powder through an inductively coupled plasma for direct metal laser sintering

N Nkhasi, W Du Preez, H Bissett

234-238
- PDF
Effect of Nb glue atom in the cluster formula on the microstructure and mechanical properties of Ti-Mo alloy

L Raganya, N Moshokoa, B Obadele, E Makhatha, R Machaka

239-243
- PDF
Corrosion performance of Ti-Cu alloys targeted for biomedical applications

N D E Masia, M Smit, I A Mwamba, L Fowler, L H Chown, S Norgren, C Öhman-Mägi, N Hashe, L A Cornish

244-250
- PDF
Tracking the railway line in-service behaviour through metallurgical and mechanical property characterisation

A Mwamba, A Mabeba, J Moema, M Phasha

251-258
- PDF
Development of ATO as an alternative catalyst support for PEM fuel cells

M Mkhabela, T Ngwenya

259-261
- PDF
Synthesizing Pt-Ni/C Nanoframes electrocatalyst using the solvothermal and in-house developed method for PEM fuel cells

J Negondeni, T Ngwenya

262-266
- PDF
Influence of operating speed on the thermo-mechanical behaviour of cylindrical roller bearing

Themba Mashiyane, Dawood Desai, Lagouge Tartibu

267-273
- PDF
Impact of heat transfer on spheroidization of titanium alloys

W A Seya, A Kolesnikov, I J Van Der Walt, H Bissett

274-277
- PDF