Abstract:
Disclosed herein is a method comprising inclining a spray gun of a high velocity oxygen fuel device at an angle of 15 degrees to a perpendicular to a substrate; incrementally displacing the spray gun to an angle of 35 degrees to the perpendicular to the substrate; spraying a surface of the substrate with the spray gun during the displacing of the spray gun; and covering the substrate with a coating that has a smooth transition zone from a coated region of the substrate to a non-coated region of the substrate; wherein the coating provides erosion protection greater than or equal to that of a coating produced when the spray gun spray angle to the substrate is not varied during the spraying.
Abstract:
This invention relates to rolls for use in or in contact with molten metal comprising a roll drum having an outer peripheral surface and a thermally sprayed coating on the outer peripheral surface of said roll drum, said thermally sprayed coating comprising from about 66 to about 88 weight percent of tungsten, from about 2.5 to about 6 weight percent of carbon, from about 6 to about 20 weight percent of cobalt, and from about 2 to about 9 weight percent of chromium; a process for preparing the rolls; a method for forming a metal layer on a metal sheet utilizing the rolls, e.g., galvanization; and a thermal spray powder for coating the outer peripheral surface of the rolls.
Abstract:
A method for fabricating and testing an article having a thermal-spray coating thereon. The method includes providing a substrate article having a surface, thermally spraying a coating material onto the surface of the substrate article, wherein a surface of contact between the coating material and the substrate article is a bondline, and nondestructively testing the coated article. Nondestructively testing includes generating an eddy current in the coated article, measuring the eddy current in the coated article, and evaluating a near-bondline region of the coated article located adjacent to the bondline using the measured eddy current.
Abstract:
A method of hardfacing a metal body, including the steps of flame spraying a metallic material onto a surface of the metal body to produce a layer of the metallic material on the metal body and fusing the layer of metallic material to provide a hardfacing layer, is improved by roughening the surface of the metal body prior to the step of flame spraying to provide a mechanical bond between the metal body and the hardfacing layer. The roughening is carried out to achieve a surface roughness adjusted to the thickness of the hardcoating. The surface roughness is preferably 40%-90% of the thickness of the hardfacing layer. A rotor for a progressing cavity pump/motor, including a metallic rotor body having a surface, and a layer of hardfacing on the surface, the hardfacing comprising of fused flame sprayed metallic material, the surface of the rotor body having an average surface roughness of at least substantially 6 mils with irregular protrusions for providing a mechanical bond between the rotor body and the hardfacing.
Abstract:
An article comprising a substrate containing silicon and a barrier layer which functions as an environmental barrier coating and, more particularly, a barrier layer which comprises hafnium silicate and, optionally, zirconium silicate and a method for forming the hafnium silicate as a barrier coating.
Abstract:
The invention is a coating and a method for applying coatings to fiber reinforced composite materials. A first polymeric layer, free of fibers and particulate, coats a fiber reinforced polymer substrate. The first layer joins the fiber reinforced polymer substrate to a second polymeric layer. The second polymeric layer contains a polymeric matrix and a particulate within the polymeric matrix. Finally, at least one thermally sprayed material coats the second polymeric layer to form an adherent multi-layer coating attached to the fiber reinforced.
Abstract:
The present invention presents an improved upper electrode for a plasma processing system, wherein the design and fabrication of an electrode plate with a deposition shield coupled to the upper electrode advantageously provides gas injection of a process gas with substantially minimal erosion of the upper electrode while providing protection to a chamber interior.
Abstract:
Method for metallizing the surface of an object. The process begins with the location of the plate in the vicinity of elements for delivering molten metal, towards which a metal supply is fed in the form of metal wires for example through guided by sheaths. In the means for melting and in particular at melting site the melting occurs of the metal source. This can be carried out by discharging an electrical arch between two electrodes, or between an electrode and a metal wire that in this case works as second electrode, or still discharging an electrical arch directly between the metal wires. Alternatively, the melting of the metal wire, can be executed using a combination of a 20 current of gas fuel and a current of a comburent gas burning at high temperature at the melting site.
Abstract:
A coating includes a porous a first layer comprising metal coated solid lubricant panicles partially fused together. A second layer comprising a metal or a composite that conforms to the surface topography of the first layer.
Abstract:
A liner outer surface is coated by a sprayed layer or a heterogeneous metal layer including a base metal phase and dispersed metal phases. During casting, liquid metal enters the sprayed layer from the dispersed metal phases and solidifies in a virtual vegetation root state. The surface of the cylinder block is thus rigidly fixed to the surface of the cylinder liner. In this case, a strong bonding force is produced between the cylinder block and the cylinder liner and high thermal conductivity is obtained compared to the prior art in which the liquid metal merely contacts a surface layer.