A braking band having an annular band body arranged around a rotation axis and made of one of gray cast iron, steel, aluminum or alloys thereof, has at least one braking surface having an activated band body portion for increasing adhesive capacity of at least one protective surface coating placed on the surface of the activated band body portion and having at least one material with elevated resistance to abrasion. The activated band body portion is arranged on the surface of the annular band body to form an outermost layer of the braking band with the at least one protective surface coating and has a rough profile having at least one channel delimited by at least one pair of projections, extending along a path at least partially surrounding the rotation axis and having a channel bottom and a first channel side forming an acute angle with the channel bottom and an opposite second channel side forming an obtuse angle with the channel bottom.

A braking band having an annular band body arranged around a rotation axis and made of one of gray cast iron, steel, aluminum or alloys thereof, has at least one braking surface having an activated band body portion for increasing adhesive capacity of at least one protective surface coating placed on the surface of the activated band body portion and having at least one material with elevated resistance to abrasion. The activated band body portion is arranged on the surface of the annular band body to form an outermost layer of the braking band with the at least one protective surface coating and has a rough profile having at least one channel delimited by at least one pair of projections, extending along a path at least partially surrounding the rotation axis and having a channel bottom and a first channel side forming an acute angle with the channel bottom and an opposite second channel side forming an obtuse angle with the channel bottom.

A brake element for a transportation vehicle, having a base body that is planar at least in some regions, to the planar sides of which at least two build-up layers are applied in each case at least in some regions. The build-up layers form a surface which, in the mounted state of the brake element on the transportation vehicle, serves as a friction surface for a brake pad. There is a bonding zone in which both a material of the base body and a material of a build-up layer adjacent to the base body are present, wherein the bonding zone has a thickness perpendicular to an areal extent of a planar side that is less than 10 μm.

The method for obtaining rolling mill rolls with a coating of tungsten carbide or the alloy thereof, wherein the coating is a single layer and is carried out by high velocity thermal spraying is disclosed.

The method for obtaining rolling mill rolls with a coating of tungsten carbide or the alloy thereof, wherein the coating is a single layer and is carried out by high velocity thermal spraying is disclosed.

A gas turbine engine article includes a substrate and an environmental barrier coating disposed on the substrate. The environmental barrier coating includes oxygen-scavenging particles. Each oxygen-scavenging particle includes a silicon-containing core particle encased in an oxygen barrier shell.

A gas turbine engine article includes a substrate and an environmental barrier coating disposed on the substrate. The environmental barrier coating includes oxygen-scavenging particles. Each oxygen-scavenging particle includes a silicon-containing core particle encased in an oxygen barrier shell.

The application relates to an aluminum alloy hub and a method for coating the surface of the aluminum alloy hub. The aluminum alloy hub is provided with an aluminum alloy matrix and a coating attached to the surface of the aluminum alloy matrix, and the coating sequentially includes a pre-coating layer formed by nickel-coated aluminum or aluminum-coated nickel powder, a Cr.sub.3C.sub.2 layer and a varnish layer on the surface of the aluminum alloy matrix. According to the aluminum alloy hub disclosed by the invention, more excellent corrosion resistance is obtained by spraying the Cr.sub.3C.sub.2 layer on the surface of the aluminum alloy hub.

The application relates to an aluminum alloy hub and a method for coating the surface of the aluminum alloy hub. The aluminum alloy hub is provided with an aluminum alloy matrix and a coating attached to the surface of the aluminum alloy matrix, and the coating sequentially includes a pre-coating layer formed by nickel-coated aluminum or aluminum-coated nickel powder, a Cr.sub.3C.sub.2 layer and a varnish layer on the surface of the aluminum alloy matrix. According to the aluminum alloy hub disclosed by the invention, more excellent corrosion resistance is obtained by spraying the Cr.sub.3C.sub.2 layer on the surface of the aluminum alloy hub.

A method for repairing a damaged portion of a steel member that includes at least one of a coating and a plating. The method includes applying to the damaged portion of the steel member a coating composition to produce a repair coating. The coating composition includes nickel, chromium, and carbon.