KARAKTERISTIK PHISIK DAN STRUKTUR MIKRO KOMPOSIT LOGAM ALUMINIUM-GRAFIT HASIL PROSES METALURGI SERBUK
Abstract: Composite graphite
alluminium represent the material with the nature of good mechanic and also
light mass so that able to economize the fuel. Composite graphite alluminium
made with the method of powder metallurgy with the step of making mixing
powder, compaction and sintering. Composite this upon which for the application
of bearing self-lubricating, so that have to measure up to the high mechanic.
Nature of the will not be reached when matrix by reinforce do not tying. To
improve that matter, need the drenching and detention of time sintering. This
research use the volume faction 92% alluminium and 8% graphite and 10%
Magnesium as wetting agent. At drenching process conducted by a graphite
veneering as reinforce use the condensation HNO3 to yield metal oxide which
variation 20 ml, 40 ml and 50 ml HNO3 with the time sintering 15 minute, 30
minute and 60 minute. At this research done by examination density, porosity
and micro structure perception. Result of research indicate that the time hold
up the sintering progressively mount hence density go up and porosity descend
so that yielded a closer micro structure but accompanied also deffect becoming
initial crack from composite material, optimum variable yielded at 20 ml HNO3
and time sinter 60 minute with the value density 2,48 g /cm3 and porosity 17,2
%.
Penulis: Agus Pramono,
Salahuddin Junus
Kode Jurnal: jptmesindd110329
