الفهرس 
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Abstract
Aluminium-Titanium Carbide (Al-TiC) composites with 5, 10, and 20wt. % titanium carbide were prepared by powder metallurgy route. Different milling times (MT) 0, 6, 12, 24 and 48 hr were used for the mechanical mixing process. The milled powders were compacted using uniaxial cold press under 600 MPa. Sintering was carried out in a vacuum furnace for 1 hr at 600°C.
The sintered products have been characterized by X-ray diffraction (XRD) for studying the phases and detect any new phases formed during the sintering process. Microstructure has been studied by feild emission scanning electron microscope (FE-SEM). The effect of both titanium carbide percentage and milling time on the density, microstructure, crystallite size, hardness, compression strength, and wear has been studied.
XRD results showed that composites with 5, 10, and 20wt. % titanium carbide at all milling times have no peaks rather than those corresponding to Al and TiC and no new phases between Al and TiC were detected. On the other hand for 48hr MT after sintering, aluminium carbide (Al4C3) phase was formed.
All specimens showed fully dense up to 24 hr MT, where as the density is decreased at 48 hr MT, due to increasing the porosity and the formation of Al4C3 phase that have lower density than Al and TiC.
Microstructural investigations have shown the homogeneous distribution of TiC over all the Al matrix and the reduction of Al grain size by increasing both milling time and TiC percent.
The hardness and compression strength were increased by increasing both TiC percent and milling time up to 24 hr while they were decreased for 48hr MT. Other wise, the wear rate was decreased gradually by increasing TiC content and MT. This is due to the strengthening effect of TiC % wt. and the suitable milling time (MT).