3524 results about "Ceramic coating" patented technology

During a deposition process, material may deposit not only on the substrate, but also on other chamber components. In a MOCVD chamber, one of those components is the gas distribution showerhead. The showerhead may be cleaned by bombarding the showerhead with radicals generated by a plasma that includes an inert gas and chlorine. In order to generate the plasma, the showerhead may be negatively biased or floating relative to the substrate support. The showerhead may comprise stainless steel and be coated with a ceramic coating.

A hybrid film, comprising a first polymer film having a plasma-treated surface and a second polymer film having first and second surfaces, with the first surface of the second polymer film being disposed along the first plasma-treated surface of the first polymer film, has superior thermal and mechanical properties that improve performance in a number of applications, including food packaging, thin film metallized and foil capacitors, metal evaporated magnetic tapes, flexible electrical cables, and decorative and optically variable films. One or more metal layers may be deposited on either the plasma-treated surface of the substrate and / or the radiation-cured acrylate polymer A ceramic layer may be deposited on the radiation-cured acrylate polymer to provide an oxygen and moisture barrier film. The hybrid film is produced using a high speed, vacuum polymer deposition process that is capable of forming thin, uniform, high temperature, cross-liked acrylate polymers on specific thermoplastic or thermoset films. Radiation curing is employed to cross-link the acrylate monomer. The hybrid film can be produced in-line with the metallization or ceramic coating process, in the same vacuum chamber and with minimal additional cost.

A segmented abradable ceramic coating system having superior abradability and erosion resistance is disclosed. The system includes a duct segment having a metallic substrate, a MCrAlY bond coat on the substrate and a segmented abradable ceramic coating on the bond coat. The segmented abradable ceramic coating includes a base coat foundation layer, a graded interlayer and an abradable top layer for an overall thickness of preferably about 50 mils (1.270 mm). The coating is characterized by a plurality of vertical microcracks. By precisely controlling the deposition parameters, composition of the layers and layer particle morphology, segmentation is achieved, as well as superior abradability and erosion resistance.

Method of producing a profiled abradable coating on a substrate in which an abradable ceramic coating composition is applied to a substrate using direct-write technology, or plasma sprayed onto the substrate through a mask or by use of a narrow foot-print plasma gun. These methods of producing abradable coatings are performed in the absence of a grid.

A method of applying a profiled abradable coating onto a substrate in which an abradable ceramic coating composition is applied to a metal substrate using one or more coating application techniques to produce a defined ceramic pattern without requiring a separate web or grid to be brazed onto the substrate. The invention is particularly designed to withstand the higher operating temperatures encountered with the stage 1 section of 7FA+e gas turbines to allow for increased coating life without significant deterioration in structural or functional integrity. Typically, the grid pattern coating begins approximately 0.431″ after the leading edge of the shroud, and ends approximately 1.60″ before the trailing edge of the shroud. In the case of diamond-shaped patterns, the grid pattern will be about 0.28″ long and 0.28″ wide, with an overall thickness of about 0.46.″ The coatings thus provide the required levels of abradability and leakage performance and may be applied as a chevron or diamond pattern with the shape oriented such that the diagonals run perpendicular and parallel to the sides of the shroud.

A biodegradable, biocompatible porous matrix as a scaffold for tissue engineering cartilage is formed of a copolymer of a polyalkylene glycol and an aromatic polyester such as a polyethylene glycol / polybutylene terephtalate copolymer. A ceramic coating such as a calcium phosphate coating may be provided on the scaffold by soaking the scaffold in a solution containing calcium and phosphate ions. A composite scaffold which is preferably a two-layer system may be formed having an outer surface of a layer of the porous matrix formed of the copolymer, and an outer surface of a layer of a ceramic material. The composite scaffold may be prepared by casting the copolymer on top of the ceramic material in a mould. Cells are preferably seeded on the scaffold prior to implanting, and the scaffold may contain bioactive agents that are released on degradation of the scaffold in vivo.

The invention discloses a ceramic and polymer composite coated lithium ion diaphragm and a preparation method thereof. The ceramic and polymer composite coated lithium ion diaphragm comprises a polyolefin porous diaphragm, a ceramic coating coated on one side or the two sides of the diaphragm surface and a polymer coating coated on the ceramic surface or the diaphragm surface. The composite diaphragm prepared by the preparation method disclosed by the invention has the advantages that the heat resistance of the diaphragm is greatly improved, and the infiltration of an electrolyte is improved; the bonding strength of the diaphragm and a positive and negative pole piece is improved, so that the internal short-circuit caused by staggering between the diaphragm and an electrode is prevented; meanwhile, the hardness of a battery is improved, so that the safety performance of the battery is greatly improved. In the production process, the ceramic coating and the polymer coating are uniform in thickness and good in uniformity and facilitate continuous and large-scale production.

There is disclosed a process and apparatus for carrying out plasma electrolytic oxidation of metals and alloys, forming ceramic coatings on surfaces thereof at a rate of 2-10 microns per minute. The process comprises the use of high-frequency current pulses of a certain form and having a given frequency range, combined with the generation of acoustic vibrations in a sonic frequency range in the electrolyte, the frequency ranges of the current pulses and the acoustic vibrations being overlapping. The process makes it possible to introduce ultra-disperse powders into the electrolyte, with the acoustic vibrations helping to form a stable hydrosol, and to create coatings with set properties. The process makes it possible to produce dense hard microcrystalline ceramic coatings of thickness up to 150 microns. The coatings are characterised by reduced specific thickness of an external porous layer (less than 14% of the total coating thickness) and low roughness of the oxidised surface, Ra 0.6-2.1 microns.

A method for producing a cast article comprises using a porous powder article as a sacrificial pattern. The porous powder article is preferably made using a rapid prototyping process. The porous powder article is used as a sacrificial pattern for a mold into which a molten metal is cast. Some embodiments include a step of proving the porous powder article with a ceramic coating. Methods of making molds and patterns using a porous powder article are also disclosed. The powder comprising the porous powder article may be a metal, ceramic or cermet. In some embodiments, the powder alloys with the molten casting metal. In some other embodiments, the powder and the casting metal form a composite. Sacrificial casting mold patterns comprising porous powder articles and casting molds comprising such sacrificial patterns are also disclosed.

This invention relates to novel process of preparing chemically bonded composite hydroxide ceramics by exposing a thermally treated hydroxide ceramic to phosphate reagent and subsequent heat treating the resulting system to initiate a rapid chemical bonding reaction. Such combined hydroxide / chemical bonding process can be used to fabricate ceramics or ceramic coatings for a variety of high and low temperature applications, including corrosion protection, wear resistance, dielectric properties, metal reinforced ceramics, ceramic membranes, non-sticky surfaces, bio-active ceramics, thermal barrier ceramics, non-wetted surfaces, and others.

A porous substrate is pretreated in a plasma field and a functionalizing monomer is immediately flash-evaporated, deposited and cured over the porous substrate in a vacuum vapor-deposition chamber. By judiciously controlling the process so that the resulting polymer coating adheres to the surface of individual fibers in ultra-thin layers (approximately 0.02–3.0 μm) that do not extend across the pores in the material, the porosity of the porous substrate is essentially unaffected while the fibers and the final product acquire the desired functionality. The resulting polymer layer is also used to improve the adherence and durability of metallic and ceramic coatings.

A corrosion resistant component of semiconductor processing equipment such as a plasma chamber comprises a cerium oxide containing ceramic material as an outermost surface of the component. The cerium oxide containing ceramic material comprises one or more cerium oxides as the single largest constituent thereof. The component can be made entirely of the cerium oxide containing ceramic material or, alternatively, the cerium oxide containing ceramic can be provided as a layer on a substrate such as aluminum or an aluminum alloy, a ceramic material, stainless steel, or a refractory metal. The cerium oxide containing ceramic layer can be provided as a coating by a technique such as plasma spraying. One or more intermediate layers may be provided between the component and the cerium oxide containing ceramic coating. To promote adhesion of the cerium oxide containing ceramic coating, the component surface or the intermediate layer surface may be subjected to a surface roughening treatment prior to depositing the cerium oxide containing ceramic coating.

A metalworking apparatus includes a threading insert with a channel-less chip breaker and a holder for holding the threading insert. The threading insert includes (i) one cooling channel disposed on the top side of the threading insert for each crest and each valley, which terminates near the cutting region, and (ii) a ceramic coating on at least the cutting region of crests and valleys, with each cooling channel being uncoated.

A corrosion resistant component of semiconductor processing equipment such as a plasma chamber comprises zirconia toughened ceramic material as an outermost surface of the component. The component can be made entirely of the ceramic material or the ceramic material can be provided as a coating on a substrate such as aluminum or aluminum alloy, stainless steel, or refractory metal. The zirconia toughened ceramic can be tetragonal zirconia polycrystalline (TZP) material, partially-stabilized zirconia (PSZ), or a zirconia dispersion toughened ceramic (ZTC) such as zirconia-toughened alumina (tetragonal zirconia particles dispersed in Al2O3). In the case of a ceramic zirconia toughened coating, one or more intermediate layers may be provided between the component and the ceramic coating. To promote adhesion of the ceramic coating, the component surface or the intermediate layer surface may be subjected to a surface roughening treatment prior to depositing the ceramic coating.