| dc.description.abstract | The processing of palm oil in the MCC source utilizing energy resource derived
from palm oil shell and fiber in which the process of fuel shell and fiber
combustion in the boiler combustion chamber producing the remaining results in
the form of palm oil fly ash which are quite plenty . This palm oil fly ash is
usually left alone in the area of oil palm mills that certainly can cause
environmental pollution and inconvenience to workers . Therefore, this study aims
to look into the chance of the utilization of fly ash as the strengthening material in
the manufacture of metal matrix composite ( MMC ) with wide variety of fly ash
composition of palm oil . Palm oil fly ash used in this study were drawn from
Palm Oil Factory ( PKS ) in the Deli Serdang, North Sumatra with a size 74 m
and before being used, this palm oil fly ash is heated to 850o
C in a furnace to
remove moisture and fractions that are still can be burned . In the manufacture of
fly ash composition variations MMC are carried out from 2.5 , 5 , 7.5 , 10 and
12.5 % fly ash mixing process is done at the time in which aluminum was melted
in a crusibel graphite following the stirring for 5 minutes , addition of about 1.5
% Mg in the fluid to improve wettability of aluminum and casting is done at a
temperature of 760o
C . The result of the research shows that the addition of fly ash
in the manufacture of MMC can increase hardness , in which 82.6 BHN where the
highest hardness was obtained at the composition of 10 % fly ash and the lowest
at 2.5 % fly ash composition . The impact test result shows that in general the
addition of fly ash does not significantly decrease the impact strength . In the
microstructure test result can be seen that palm oil fly ash exists among the
aluminum matrix , but the distribution of the fly ash is not uniform in the all parts
. The result of the above study shows that palm oil fly ash can be utilized for the
manufacture of metal matrix composite with aluminium as the matrix , but the
method of manufacture needs to be completed further to obtain optimum results
because the stir casting method has not been able to achieve a homogeneous
distribution of the fly ash. | en_US |
