203results about How to "Reduce erosion rate" patented technology

A ceramic article which is resistant to erosion by halogen-containing plasmas used in semiconductor processing. The ceramic article includes ceramic which is multi-phased, typically including two phase to three phases. The ceramic is formed from yttrium oxide at a molar concentration ranging from about 50 mole % to about 75 mole %; zirconium oxide at a molar concentration ranging from about 10 mole % to about 30 mole %; and at least one other component, selected from the group consisting of aluminum oxide, hafnium oxide, scandium oxide, neodymium oxide, niobium oxide, samarium oxide, ytterbium oxide, erbium oxide, cerium oxide, and combinations thereof, at a molar concentration ranging from about 10 mole % to about 30 mole %.

An implantable medical device, such as a stent, with a coating region for controlling erosion of the substrate region is disclosed.

A ceramic article useful in semiconductor processing, which is resistant to erosion by halogen-containing plasmas. The ceramic article is formed from a combination of yttrium oxide and zirconium oxide. In a first embodiment, the ceramic article includes ceramic which is formed from yttrium oxide at a molar concentration ranging from about 90 mole % to about 70 mole %, and zirconium oxide at a molar concentration ranging from about 10 mole % to about 30 mole %. In a second embodiment, the ceramic article includes ceramic which is formed from zirconium oxide at a molar concentration ranging from about 96 mole % to about 94 mole %, and yttrium oxide at a molar concentration ranging from about 4 mole % to about 6 mole %.

A method and apparatus to maximize spark plug life in pre-chamber spark plugs operating with ultra-lean mixtures and/or elevated engine BMEP is presented. Electrode erosion is reduced by spreading discharge energy over a wider surface area, maintaining fuel concentration in the spark gap, controlling gas static pressure during discharge, and maintaining safe electrode temperature. Energy is spread via a swirling effect created by periphery holes in an end cap, resulting in a lower specific energy discharge at the electrodes. Divergently configured electrodes reduce the spark voltage at high operating pressures and the energy required for ignition. The flow field generated at the electrodes prevents electrical shorts due to water condensation and avoids misfire. The center electrode insulation provides an effective heat transfer path to prevent electrode overheating and pre-ignition. The volume behind the electrodes provides a volume for burnt products from previous combustion cycles and leads to more reliable ignition.

A method and apparatus to maximize spark plug life in pre-chamber spark plugs operating with ultra-lean mixtures and/or elevated engine BMEP is presented. Electrode erosion is reduced by spreading discharge energy over a wider surface area, maintaining fuel concentration in the spark gap, controlling gas static pressure during discharge, and maintaining safe electrode temperature. Energy is spread via a swirling effect created by periphery holes in an end cap, resulting in a lower specific energy discharge at the electrodes. Divergently configured electrodes reduce the spark voltage at high operating pressures and the energy required for ignition. The flow field generated at the electrodes prevents electrical shorts due to water condensation and avoids misfire. The center electrode insulation provides an effective heat transfer path to prevent electrode overheating and preignition. The volume behind the electrodes provides a volume for burnt products from previous combustion cycles and leads to more reliable ignition.

A method of etching multiple films with a dual layer hard mask wherein one layer is totally removed and the other layer partially removed during deep trench etching of the silicon substrate. In particular, a method of deep trench etching silicon substrates comprising the steps of providing a semiconductor substrate capable of being etched, with HBr/NF3/He/O2, having a layer of pad dielectric disposed depositing a layer of material capable of selective removability with respect to the pad dielectric, preferably BSG; depositing a layer of material having a slower etch rate than the semiconductor substrate and the layer of material capable of selective removability with respect to the pad dielectric, preferably, silicon oxide deposited by PECVD; patterning at least one of the layers, and etching the semiconductor substrate to form a trench and removing the layer of material having a slower etch rate than the semiconductor substrate, wherein trenches are of close proximity to each other.

A bulk, sintered solid solution-comprising ceramic article useful in semiconductor processing, which is resistant to erosion by halogen-containing plasmas and provides advantageous mechanical properties. The solid solution-comprising ceramic article is formed from a combination of yttrium oxide and zirconium oxide. The bulk, sintered solid solution-comprising article is formed from zirconium oxide at a molar concentration ranging from about 96 mole % to about 94 mole %, and yttrium oxide at a molar concentration ranging from about 4 mole % to about 6 mole %.

An igniter (20) emitting an electrical field including a plurality of streamers forming a corona includes a corona enhancing tip (52) at an electrode firing end (28). The corona enhancing tip (52) includes an emitting member (58) such as a wire, layer, or sintered mass, formed of a precious metal and disposed on a base member (54). The base member (54) is formed of a nickel alloy. The emitting member (58) has a lower electrical erosion rate and chemical corrosion rate than the base member (54). The emitting member (58) presents the smallest spherical radius of the corona enhancing tip (52) at the outermost radial point (56) to concentrate the electrical field emissions and provide a consistently strong electrical field strength over time.

A solid solution-comprising ceramic article useful in semiconductor processing, which article may be in the form of a solid, bulk ceramic, or may be in the form of a substrate having a ceramic coating of the same composition as the bulk ceramic material on at least one outer surface. The ceramic article is resistant to erosion by halogen-containing plasmas and provides advantageous mechanical properties. The solid solution-comprising ceramic article is formed from a combination of yttrium oxide and zirconium oxide. The ceramic-comprising article includes ceramic which is formed from zirconium oxide at a molar concentration ranging from about 96 mole % to about 91 mole %, and yttrium oxide at a molar concentration ranging from about 4 mole % to about 9 mole %.

The invention discloses a method for preparing a ceramic coating on the surface of a porous ceramic matrix by slurry spraying. The method comprises the processes of matrix treatment, slurry preparation, spraying, drying, and sintering. The uniform coating samples can be obtained in batch by spraying slurry by an air atomization spray gun. The obtained coating after being sintered is uniform and compact, has good combination with the porous ceramic matrix, and has clear interface. The coating does not infiltrate to the porous matrix severely. The coating can significantly decrease water absorption of the porous ceramic matrix, increases surface hardness, and reduces erosion rate of the matrix. Compared with a conventional method, the method has the advantages of simple process, high production efficiency, low cost and the like, and is easy for large-scale production and industrialized application.

The invention discloses a preparation method of a thermal barrier coating of lanthanum zirconate fiber doped lanthanum zirconate, and relates to a preparation method of a thermal barrier coating. The technical problems that a novel lanthanum zirconate thermal carrier coating is poor in erosive wear resistance and is likely to lose efficacy when impacted by external particles are solved. The preparation method comprises the steps that a composite lanthanum zirconate ceramic layer spraying powder material is prepared; a bonding layer spraying material is sprayed to the surface of preprocessed matrix metal; a layer of composite lanthanum zirconate ceramic layer spraying material is sprayed to a bonding layer. Compared with a traditional thermal barrier coating which is not reinforced by fiber, the erosive wear resistance of the thermal barrier coating system is higher. The preparation method is applied to the field of composite materials.

The Hall effect plasma thruster comprises a main annular channel (120) for ionization and acceleration that presents an open downstream end (129), at least one cathode, an annular anode concentric with the main annular channel (120), a pipe and a manifold for feeding the channel (120) with ionizable gas, and a magnetic circuit for creating a magnetic field in said main annular channel (120). The main annular channel (120) comprises inner and outer annular wall portions (127,128) situated in the vicinity of said open end (129), each of which comprises an assembly of juxtaposed conductive or semi-conductive rings (150) in the form of laminations separated by fine layers of insulation (152).

The invention discloses a mammoth converter lining and a construction method thereof. The mammoth converter lining comprises a converter bottom part, a melting bath joint seam part, a converter body part and a converter cap part, wherein the converter bottom part, the melting bath joint seam part, the converter body part and the converter cap part comprise permanent layers, middle padding layers and working layers; the working layer at the melting bath joint seam part on a left lug shaft side and a right lug shaft side is manufactured from MT-18A marked magnesium carbon bricks; and the MT-18A marked magnesium carbon bricks have same length and are constructed into an arc-shaped transitional surface with a smooth inner side. A wedge brick is embedded into a seal part of the converter cap and a ramming material completely fills the seal part. The method comprises the following steps of: step 1) setting a lining brick construction sequence; step 2) constructing all the bricks according to a preset construction sequence during a construction sequence; step 3) measuring the inclination angle of the upper plane of the lining bricks after one layer is constructed so as to ensure that the inclination angles of all the parts are same; 4) measuring the lining brick levelness after the last layer of the arc-shaped transitional surface part is constructed; and 5) performing full-process monitoring during the construction process, and baking the converter after achieving acceptance.

The invention relates to a composite long-life low-cost steel ladle air brick base brick. The composite long-life low-cost steel ladle air brick base brick comprises a base brick body, the base brick body comprises an upper body and a lower body which are molded by once casting of different cast materials. The upper body is 260 to 300 mm high, and the inner wall of the upper body is circumferentially provided with grooves uniformly distributed along the height direction. By the composite long-life low-cost steel ladle air brick base brick, cost performance is superior to that of an existing composite air brick base brick, corrosion speed is lower to more than 0.5 mm per furnace year on year, and service life is prolonged by more than ten times.

The invention discloses an MgCa-SiC-C fireproof material, belonging to the technical field of fireproof materials. The MgCa-SiC-C fireproof material comprises the following components by mass: 50-70% of electrically molten or sintered magnesium-calcium sand or magnesium-domolite sand granule, 10-20% of electrically molten or sintered magnesium sand fine powder, 5-17% of silicon carbonate, 5-15% of graphite, 1-10% of additive, and anhydrous resin bonder accounting for 3-5% of total mass percent of the electrically molten or sintered magnesium-calcium sand or magnesium-domolite sand granule, the electrically molten or sintered magnesium sand fine powder, the silicon carbonate, the graphite and the additive. The invention further discloses a preparation method of the MgCa-SiC-C fireproof material. The MgCa-SiC-C fireproof material can be applied to a high-temperature steel and iron metallurgy container, especially as an inner lining of a hot metal ladle for iron making, and can meet smelting requirements of the preprocessed hot metal ladle.

The invention belongs to the technical field of fireproof materials, and relates to a nano silica sol combination hearth self-flowing material and a preparation method thereof. The nano silica sol combination hearth self-flowing material comprises the following components in parts by weight: 65 to 80 parts of corundum, 8 to 20 parts of silicon carbide, 5 to 10 parts of active alumina micropowder, 2 to 5 parts of silica micropowder, 1 to 5 parts of spherical asphalt, 0.03 to 0.08 part of inorganic fiber, 0.01 to 0.1 part of sol curing agent, 0.05 to 0.15 part of dispersant, and 7 to 10 parts of nano silica sol. The provided nano silica soil combination hearth self-flowing material is an advanced self-flowing material for building or maintenance of blast furnace. The self-flowing material is casted and moulded through a framework and pump-delivering so as to build or repair a hearth. Compared with the conventional brick building method, the self-flowing material method has the characteristics of strong integral property, convenience for construction, little construction time, quick production, long service life, and little environmental pollution. Compared with the conventional ceramic cups, SiC and nano silica sol are combined to enhance the matrix, and the performance on resisting molten iron erosion is greatly improved.