Browsing Journal Articles by Author "Machio, Christopher N"

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Characterization of mechanically alloyed f.c.c. Ti–Mg–based powders

Author: Machio, Christopher N ; Nyabadza, D ; Sibanda, V ; Chikwanda, HK Date: May 2010 Face centred cubic Ti – 10 and 20 Mg and Ti-6Al-4Mg (wt. %) alloy powders have been produced by high energy ball milling, under argon, of elemental powder mixtures containing a process control agent (PCA). Milling leads to a multi-disperse ... Read more
Consolidation of titanium hydride powders during the production of titanium PM parts: The effect of die wall lubricants

Author: Machio, Christopher N ; Machaka, Ronald ; Chikwanda, HK Date: Nov 2015 The effects of die wall lubricants on the cold compaction of titanium hydride powder are studied. Three commonly-used die wall powder metallurgy lubricants – zinc stearate, Acrawax® C dispersion and Mirror Glaze® – are compared. The influence ... Read more
Corrosion behaviour of WC-VC-Co hardmetals in acidic media

Author: Konadu, DS ; Van der Merwe, J ; Potgieter, JH ; Potgieter-Vermaak, S ; Machio, Christopher N Date: Sep 2010 The effect of increasing vanadium carbide (VC) content on the corrosion behaviour of tungsten carbide – 10 wt% cobalt hard metals was investigated in 1 M hydrochloric (HCl), and sulphuric (H2SO4) acids solutions. Increasing VC content makes ... Read more
Corrosion of WC-VC-Co hardmetal in neutral chloride containing media

Author: Machio, Christopher N ; Konadu, DS ; Potgieter, JH ; Potgieter-Vermaak, S ; Van der Merwe, J Date: Jan 2013 Corrosion is an important surface degradation process in some, if not all, applications of tungsten-carbide-(WC-) cobalt- (Co-) based hardmetals. Applications like tools for machining of metals and for wear resistance in the mining industry ... Read more
Effect of process control agent (PCA) on the characteristics of mechanically alloyed Ti-Mg powders [Journal article]

Author: Machio, Christopher N ; Chikwanda, HK ; Chikosha, S Date: Mar 2011 This paper reports the results of a study to determine the effect of process control agent (PCA) on the characteristics of Ti-Mg powders during milling. It has been shown that a 2% increase in PCA content leads to up to a 40% increase in yield ... Read more
Mechanical alloying and sitering of TI - 10WT.% MG powders

Author: Machio, Christopher N ; Nyabadza, D ; Chikwanda, HK ; Phasha, M ; Sibanda, VM Date: Jun 2009 A Ti-10wt.%Mg powder alloy has been produced by mechanical alloying. Elemental powders of Ti and Mg were ball milled in a Zoz-Simoloyer CM01 for 16 and 20 hours under argon. Mechanical alloying was followed by XRD, SEM and particle size ... Read more
Modelling and optimization of surface roughness during AISI P20 milling process using Taguchi method

Author: Tlhabadira, I ; Daniyan, IA ; Machaka, Ronald ; Machio, Christopher N ; Masu, L ; VanStaden, LR Date: Jun 2019 Surface roughness Ra is a parameter normally used to indicate the level of surface irregularities during machining operations. This work aims to model the cutting process, correlate and optimise the critical process parameters using the Taguchi ... Read more

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Browsing Journal Articles by Author "Machio, Christopher N"

Browsing Journal Articles by Author "Machio, Christopher N"

Browse

All of ResearchSpace

This Collection

Quick Links

Legislation and compliance

General Enquiries

Social Connect