  Institute Dante Pazzanese of Cardiology (IDPC) develops Ventricular Assist
Devices (VAD) that can stabilize the hemodynamics of patients with severe heart
failure before, during and/or after the medical practice; can be temporary or
permanent. The ADV's centrifugal basically consist of a rotor suspended for
system pivoting bearing; the PIVOT is the axis with movement of rotational and
the bearing is the bearing surface. As a whole system of an implantable VAD
should be made of long-life biomaterial so that there is no degradation or
deformation during application time; surface modification techniques have been
widely studied and implemented to improve properties such as biocompatibility
and durability of applicable materials. The Chemical Vapour Deposition
technique allows substrates having melting point higher than 300 {\deg}C to be
coated, encapsulated, with a diamond like carbon film (DLC); The test simulated
the actual conditions in which the system of support remains while applying a
ADV. The results have been prepared on a comparative basis; where you select
the pivoting assembly which showed less deformation by abrasive wear.
