Tests were carried out to examine the abrasiveness of diamond-like carbon (
DLC) coated-coupons run against steel balls. Al low loads, the initial abra
sion rate increases with load, while at higher loads, the initial abrasion
rate is roughly independent of the load. Surprisingly, however, the rate at
which the abrasiveness of the W-DLC is lost does not depend on the load. O
ur results differ from those predicted by standard equations of abrasion. T
he rate at which the abrasiveness of DLC is lost takes a similar value for
all of the W- and Ti-DLCs that we have examined, even though the DLCs vary
in hardness from 8 to 14 GPa and vary in composition from 6 to 20% metal. (
C) 1999 Elsevier Science S.A. All rights reserved.