A carbon fiber (CF) reinforced poly-ether-ether-ketone (PEEK) gear was prep
ared by injection molding, and its gear performance was evaluated, It was f
ound that the wear process of the CF reinforced PEEK gear significantly var
ied depending on the test conditions, such as the kind of the partner gear
combined and whether a lubricant exists on the engagement region or not. It
was assumed that the existence of transfer film at the engagement region,
the affinity between PEEK and CF, the compression modulus as well as surfac
e hardness of the partner gear, and the characteristics of CF play a role o
f differentiation in the wear depth. (C) 2000 Elsevier Science Ltd. All rig
hts reserved.