Abstract:
Yttria-coated ceramic components of semiconductor material processing apparatuses include a substrate and at least one yttria-containing coating on the substrate. The components are made by applying a first yttria-containing coating on a ceramic substrate, which can be a green body of the ceramic material. The coated green body is sintered. The first yttria-containing coating can be treated to remove attached yttria particles resulting from the sintering. In another embodiment, a second yttria-containing coating can be thermally sprayed on the first yttria-containing coating to cover the particles.
Abstract:
The medical device of the invention comprises a surface comprising at least one outermost portion and a plurality of depressions. The depressions occupy at least about 80% of the surface area of the surface. The depressions contain a coating material that preferably comprises a biologically active material and/or polymer, and the outermost portion is substantially free of any coating material. The invention is also directed to a method for manufacturing a medical device. The method comprises applying a coating material to the surface of the medical device by using at least one roller.
Abstract:
An apparatus for applying segmented ceramic coatings includes means for supporting and moving one or more substrates; one or more heat sources disposed proximate to one or more substrates, wherein at least one of the heat sources is positioned to apply a heat stream to pre-heat a thermal gradient zone on a surface of a substrate; a material deposition device disposed proximate to one or more heat sources, wherein the material deposition device is positioned to deposit a material on a deposition area located behind the thermal gradient zone on the surface; and means for monitoring a surface temperature of one or more substrates.
Abstract:
A component is disclosed. The component comprises a substrate comprising an outer surface and an inner surface, where the inner surface defines at least one hollow, interior space, where the outer surface defines one or more grooves, and where each of the one or more grooves extends at least partially along the surface of the substrate and has a base. One or more access holes extend through the base of a respective groove to place the groove in fluid communication with respective ones of the at least one hollow interior space. The component further comprises a coating disposed over at least a portion of the substrate surface, where the coating comprises one or more layers. At least one of the layers defines one or more permeable slots, such that the respective layer does not completely bridge each of the one or more grooves. The grooves and the coating together define one or more channels for cooling the component. Methods for fabricating and coating a component are also provided.
Abstract:
A process for applying a plurality of coats of abrasion resistant material to a substrate such as a rotor for an air-craft. The abrasion resistant material is composed of a first and a second material. The coats gradually transition from an abrasion resistant composition having a larger percentage part per volume of the first material to a larger percentage part per volume of the second material as additional coats are applied.
Abstract:
A method of and system for repairing the sheaves (24) in an elevator system has these steps. The ropes (22) associated with the sheave are removed, the sheave is cleaned, and a coating (24) is deposited on the cleaned surface. The coating is adapted to reduce the wear coefficient of the surface of the coated sheave by about 80% to 90% with respect to the sheave without a coating. The thickness of the coated sheave is adjusted to produce a specified sheave diameter.
Abstract:
A composite article includes a substrate and a layer attached to the substrate. The layer includes a metal phase, a first ceramic phase, and a second ceramic phase.
Abstract:
A method of forming a pattern on a turbomachine component includes adding material to selected surface regions of the turbomachine component, the material is arranged in a predetermined pattern.
Abstract:
A process for the manufacture of sputtering target comprises the steps of i) providing a substrate; ii) plasma melting of a material selected to form the sputtering target, yielding droplets of molten material; and iii) deposition of the droplets onto the substrate, yielding a sputtering target comprised of the coated layer of the material on the substrate. In some application, it might be preferable that the substrate be a temporary substrate and iv) to join the coated temporary target via its coated layer to a permanent target backing material; and v) to remove the temporary substrate, yielding a sputtering target comprised of the coated layer of the material on the permanent target backing material. The plasma deposition step is carried out at atmospheric pressure or under soft vacuum conditions using, for example, d.c. plasma spraying, d.c. transferred arc deposition or induction plasma spraying. The process is simple and does not require subsequent operation on the resulting target.