Search
Now showing items 1-6 of 6
Characteristics of the combustion synthesis of TiC and Fe-TiC composites
(1994-10-01)
The combustion synthesis of TiC, using the thermal explosion mode, was investigated by varying some of the process parameters including the reactant particle size, the pre-compaction pressure, and the heating rate. Based ...
Reduction/carburisation of columbite concentrate
(1994-06-01)
The carbothermic reduction of columbite has been investigated at 1400°C utilising coal and graphite as alternative sources of carbon. Reduction to an iron-carbon matrix and NbC and TaC carbides occurs readily with complete ...
Kinetic dissociation of nickel titanate and nickel tungstate in oxygen potential gradients
(1994-06-01)
Nickel titanate (NiTiO) and nickel tungstate (NiWO) were exposed to oxygen potential gradients at 1400 and 1100° C, and they were found to dissociate into their constituent oxides, namely, NiO and TiO, and WO and NiO, ...
Carbothermic reduction of a columbite concentrate to produce cemented carbides and metal-matrix composites
(1994-04-01)
The study of the carbothermic reduction of a columbite concentrate was carried out to form cemented carbides based on particles of (Nb, Ta)C solid solution bonded together by ferromanganese. The effect of various parameters ...
Preparation of ceramic composite powders from waste colliery minestones
(1994-03-01)
An investigation was carried out to examine the potential for producing ceramic composites from waste colliery minestones. The nature of the raw materials had a marked influence on the kinetics and the product morphology. ...
Preparation and microstructure of AlOTiC composites by self-propagated high temperature synthesis
(1994-01-04)
This investigation was concerned with the production of ceramic composites based on AlOTiC by means of self-propagated high temperature synthesis. When titanium and carbon black mixed with AlO powder reacted, the ignition ...