TITLE:
Friction Coefficient Displayed by the Scratch of Epoxy Composites Filled by Metallic Particles under the Influence of Magnetic Field
AUTHORS:
F. I. El-Zahraa, G. T. Abdel-Jaber, M. I. Khashaba, W. Y. Ali
KEYWORDS:
Friction Coefficient, Epoxy Composites, Iron, Copper, Aluminium, Magnetic Field, Scratch
JOURNAL NAME:
Materials Sciences and Applications,
Vol.6 No.2,
February
15,
2015
ABSTRACT: The wide use of epoxy composites as bearing materials in electronic appliances necessitates studying
their frictional behaviour under the influence of magnetic field. Experiments were carried out
to investigate the effect of magnetic field on the friction coefficient displayed by the scratch of
epoxy composites filled by iron, copper and aluminium particles at different concentrations. It was
observed that, for epoxy filled by the metallic fillers (iron, copper and aluminium), under the effect
of the magnetic field, friction coefficient showed relative decrease then significantly increased
with further increase of the intensity of the magnetic field. Besides, friction coefficient increased
with increasing the content of the metallic fillers due to the decrease of the strength of the epoxy
matrix. The values of friction coefficient displayed by epoxy filled by copper were lower than those
observed for epoxy filled by iron. Filling epoxy by aluminium displayed lower friction coefficient
than that observed for epoxy composites filled by iron and copper. This can be attributed to the
charging of aluminium by positive charge when slid against steel. The resultant charge on the
sliding surfaces was lower than that generated when epoxy was filled by iron and copper. In that
condition, the adhesion of epoxy composites would be relatively weaker leading to the decrease of
friction coefficient.