Friction force between a spherical slider and a smooth flat surface of mica
, glass, silicon, sitall, sapphire, metal or diamond-like coating has been
measured at reciprocating motion. The slider was made of steel or sapphire.
It was revealed that higher surface microhardness of the samples gave lowe
r friction coefficient. An attempt to model friction process of a precision
joint in the presence of wear particles in the contact zone was undertaken
. For this purpose, ultrafine diamond particles (UFD) were introduced into
the friction zone. The friction coefficient increased nonmonotonously with
the sample surface microhardness. This fact is explained by abrasive action
of the particles and prevailing component deformation in friction. A possi
bility of reducing the effect of hard particles on friction coefficient has
been demonstrated with the surface microrelieves, which contain peak textu
res. (C) 2000 Elsevier Science S.A. All rights reserved.