公开(公告)号：CA2557383A1

公开(公告)日：2008-02-28

申请号：CA2557383

申请日：2006-08-28

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HANSEN BRUCE D ,  COOPER CLARK V ,  BEWILOUGA KLAUS

IPC: C09K3/14 ,  B32B15/16 ,  C23C30/00

Abstract: A substrate includes a metal diamond-like-carbon coating composed of a first laver and second layer deposited thereupon and having a thickness of about 0.5 micrometer to 10 micrometers. The first layer is composed of a transition metal and includes a first surface and a second surface in contact with the substrate. The second layer is composed of carbon and a transition metal selected from the group consisting of tungsten, niobium, titanium and combinations thereof, and also includes a first surface and a second surface in contact with the first surface of the first layer. The metal-containing diamond-like-carbon coating compositions possesses an abrasive wear rate of no more than about 10 x 10 -15 m3 m-1 N-1 over a negative biasing potential range of about -50 volts to -750 volts.