Study ou wear resistance and microstructure of nanosilica-iron based composites.

When a machine is in operation, two moving surfaces interact to generate a large
amount of wear particle. Abrasive wear of engineering machine components caused by
the abrasive particle is the major industrial problem. In materials science, wear is the
erosion of material from a solid surfuce by the action of another surfuce. It is related to
surfuce interactions and more specifically the removal of material from a surfuce as a
result of mechanical action. Wear caused by the presence of abrasive particles is
influenced by their size, concentration, shape, hardness, and sliding velocities.
The objective of this report is to study on wear resistance ofNanosilica-iron based
composites. The studies of this project are aim to research about the differential
percentage of nanosilica addition to the pure iron with different sintered temperatures
and focus on physical and mechanical properties of nanosilica-iron based composite,
several tests will be conducted to the samples, which include density measurement,
hardness test and wear resistance.
Currently, iron based silica sand nanoparticles composites 5, 10, 15 and 20 wt.%
of nanoparticles silica and were developed through powder metallurgy technique and
sintered at 900c, 1 OOOc and 11 OOc. So to determined which composition are better
regarding to the sintered temperature value wiii be test by using hardness test and wear
resistance test.
The results show that the addition of silica sand nanoparticles to iron enhanced the
hardness and wear resistance with increasing the sintered temperature and silica
sandnanoparticles. An improvement in sintered densities was also observed with
increasing trend of sintering temperatures. An optimum value of20wt.% of silica sand
nanoparticles in iron based composites was found to have best micro hardness values
and wear resistance for all sintering temperatures.