Aluminum Silicon Carbide Particulate Metal Matrix Composite Development Via Stir Casting Processing
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Springer
Abstract
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In this paper, conventional simple methods of
Q1
producing MMC with attained properties through the dis
persion of silicon carbide in the matrix were investi11
gated. To achieve these objectives two step-mixing method
of stir casting technique has been employed. Aluminum
(99.66 %C.P) and SiC (320 and 1200 grits) were chosen
as matrix and reinforcement materials respectively. Exper
iments were conducted by varying weight fraction of SiC
for 2.5 %, 5.0 %, 7.5 % and 10 %. The result indicated
that the stir casting method was quite successful to obtain
uniform dispersion of reinforcement in the matrix. This
was evident by the improvement properties of composites
over the base metal. Reinforced Aluminium Silicon Car
bide (ASC) showed increase in Young’s Modulus (E) and
hardness above the unreinforced case and marginal reduc
tion of electrical conductivity was recorded for the com
posites. The silicon carbide of 1200 grits (3 μm) showed
increased Young’sModulus (E) and hardness of 1517.6Mpa
and 26.1 Hv values at 7.5% volume fraction silicon carbidewhen compared with the silicon carbide 320 grit (29 μm)Also; the electrical conductivity properties of the two grit
sizes of the Silicon Carbides were less than the base metal
for all the volume fraction of Silicon Carbide
Keywords
T Technology (General), TJ Mechanical engineering and machinery