Abstract
The self-lubricating wear behaviour of a C-fibre reinforced borosilicate glass matrix composite was investigated using a vane-stator configuration resembling a rotating vacuum pump. The vanes were made of the composite material and the stator was of cast iron. Tests were carried out under varying loads in the range 3.8 to 5.8 N. Rotational velocities varied between 5.5 and 7.8 m/s. Fibre fracture and glass matrix particle detachment were the damage mechanisms observed by scanning electron microscopy. Composite wear was accompanied by material transfer onto the stator surface. The formation of isle-type and continuous graphitic films on the counter-body surface was observed. These films provide adequate lubrication during friction, leading to a relatively low wear of the composite under the conditions investigated.
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