Abstract:
Disclosed is a valve cross head adapted for mechanically translating valve opening impulses from the rocker arm of an internal combustion engine to the valve stem of the internal combustion engine. The cross head has a metal body portion and a ceramic wear pad. The ceramic wear pad includes a chemical vapor deposited transition metal film on the surface thereof whereby to permit adhesion thereof by brazing or soldering between the wear pad and the body portion.
Abstract:
A wear resistant dental burr coating is provided. The wear resistant coating comprises an external layer of disordered boron and carbon applied to the dental burr. In accordance with one embodiment, the disordered boron and carbon external coating is of a composition B.sub.x C.sub.1-x where x is from about 0.60 to about 0.90.
Abstract:
A wear resistant multilayer coating is provided. The wear resistant coating comprises at least one internal layer and a thin, external layer of disordered boron and carbon applied to a substrate. The synergistic interaction of a hard internal layer and a lubricious boron and carbon layer provides a long lived tool coating. In a more specific embodiment, the external layer of the coating is disordered boron carbide. In accordance with one embodiment, the disordered boron and carbon external coating is of a composition B.sub.x C.sub.1-x where x is from about 0.60 to about 0.90.
Abstract:
Disclosed is a method of forming a hard, carbonaceous film on a substrate and the hard carbonaceous film formed thereby. The hard carbonaceous film is formed by decomposing a gaseous hydrocarbon having carbon atoms tetrahedrally coordinated to carbon nearest neighbors through carbon-carbon single bonds. The gaseous hydrocarbon is decomposed in a radio frequency maintained plasma and the plasma decomposition products are deposited on a cathodic substrate. Optionally, fluorocarbons may be present in a decomposition gas.
Abstract:
Disclosed is a method of forming a hard, carbonaceous film on a substrate and the hard carbonaceous film formed thereby. The hard carbonaceous film is formed by decomposing a gaseous hydrocarbon having carbon atoms tetrahedrally coordinated to its nearest neighbors through carbon-carbon single bonds. The gaseous hydrocarbon is decomposed in a radio frequency maintained plasma and the plasma decomposition products are deposited on a cathodic substrate. Optionally, fluorocarbons may be present in a decomposition gas.