165 results about "Thermal spraying" patented technology

The invention discloses a novel laser thermal spraying gun, and belongs to the technical field of laser additive manufacturing, the novel laser thermal spraying gun comprises a connecting seat, an air knife assembly, an inner nozzle, an outer nozzle, a cooling sleeve cover plate and a cooling sleeve, the outer nozzle comprises a powder feeding body and a Laval pipe, and a diffusion hole is formed in the Laval pipe; the Rafael nozzle accelerates air flow through a gradually-shrinking-gradually-expanding structure, a high-speed and high-temperature jet flow environment is formed, powder is fully preheated and evenly dispersed before reaching a base body, the Rafael pipe and laser spraying are combined, the advantages of the laser cladding technology and the thermal spraying technology are combined, the acceleration effect of Rafael air flow is overlaid, and the thermal spraying effect of the laser cladding technology and the thermal spraying technology is improved. Under the action of high-temperature and high-pressure air flow, the powder is in full contact with a laser heat source in a flying distance long enough through a Laval nozzle, so that the powder and a matrix form metallurgical bonding in a molten state, the bonding strength can be 2-3 times that of traditional thermal spraying, and the powder is suitable for the limited space environment of water erosion protection and repair of the steam turbine blade.

The invention relates to the field of plasma spraying and thermal spraying powder and wires, and particularly discloses a nine-axis spraying workstation which is characterized in that the nine-axis spraying workstation comprises a nine-axis spraying device and a protection device, the nine-axis spraying device is located on one side of the protection device, the protection device is provided with a spraying point position, and the spraying point position is located on the other side of the protection device; the nine-axis spraying device comprises a supporting seat, a six-axis mechanical arm, a spraying head and a multi-station objective table, the supporting seat is located on one side of the spraying point position, the six-axis mechanical arm is installed on the supporting seat, the spraying head is installed at the end of the six-axis mechanical arm, the multi-station objective table is rotationally connected to the supporting seat, and the multi-station objective table is located on the supporting seat. The carrying stations on the multi-station carrying table can rotate to the spraying point positions, and the protection device covers the spraying point positions and isolates the carrying stations located at the spraying point positions from other carrying stations. The spraying device has the effects that the spraying efficiency can be improved, and the body health of workers can be guaranteed.

The invention belongs to the technical field of thermal spraying, and particularly relates to a manufacturing process of an aluminum-titanium meltallizing composite coating applied to a semiconductor equipment cavity, which comprises the following steps: (1) carrying out sand blasting on the semiconductor equipment cavity by using a white corundum sand material; (2) residual sand materials are removed, cleaning and drying treatment are carried out, and a pretreated semiconductor equipment cavity is obtained; (3) aluminum wires are subjected to melt injection on the surface of the pretreated semiconductor equipment cavity through supersonic flame, and an aluminum melt injection coating is obtained; and (4) dissolving and injecting a titanium wire on the surface of the aluminum meltallizing coating by using hypersonic flame to obtain a titanium meltallizing coating, cleaning, drying and carrying out vacuum heat treatment. According to the prepared composite coating, the roughness meets the requirement, the meltallizing binding force is high, the coating is not prone to falling off, the porosity is low, and the coating is more compact.

The invention relates to the technical field of thermal spraying and surface nitriding, in particular to a high-thermal-conductivity wear-resistant hot-corrosion-resistant high-entropy alloy coating with a multi-layer structure and a preparation method thereof, and the high-thermal-conductivity wear-resistant hot-corrosion-resistant high-entropy alloy coating comprises a first NiCr bonding layer, a second AlCoCrNiMo high-entropy alloy transition layer, a third AlCoCrNiMoBSi high-entropy alloy functional layer and a fourth nitriding modification layer. According to the method, the high-entropy alloy powder is prepared through step-by-step mechanical alloying and solid solution-aging treatment, and compared with a traditional method, the preparation process is remarkably simplified. Based on the inherent wear resistance and thermal corrosion resistance of the high-entropy alloy, a coating system with a gradient function is prepared by adopting an oxygen-kerosene supersonic flame spraying technology, and then a nitriding modified layer is formed through nitriding treatment. According to the multi-layer structural design, good transition and bonding strength between layers are achieved, meanwhile, excellent heat conduction performance is achieved, and the abrasion resistance and the heat corrosion resistance of the coating are remarkably improved.

The invention relates to the technical field of plasma thermal spraying processing, in particular to an automatic thermal spraying robot for die-casting die maintenance, which comprises a bottom frame, a driving component, a driven screw rod, a moving component, a spray gun, an adjusting block, an adjusting component, a synchronous block, a synchronous component, a cooling system and a re-spraying positioning component, spiral spraying of the die-casting die is achieved in the mode that rotation of the die-casting die is combined with movement of the spraying gun, the adjusting component and the transmission are arranged, the spraying distance of the spraying gun to the die-casting die can be adjusted, meanwhile, the movement speed of the spraying gun can be synchronously adjusted, and cooling can be stopped at any time by arranging the cooling system and the re-spraying positioning component; and after cooling, it is guaranteed that the spray gun can be aligned to the position of the die-casting die before cooling, the quality of plasma thermal spraying is guaranteed, the maintenance effect of the die-casting die is improved, and then the quality of non-ferrous metal parts produced by the die-casting die is improved.

The invention provides single-phase solid solution oxide thermal spraying powder and coating and a preparation method thereof, the powder and coating material comprises ZrO2-Xmol% Yb2O3, and X is equal to 8-30. The coating has no phase change in a range from room temperature to 2400 DEG C, and has a thermal protection capability of bearing more than 240 seconds in an arc plasma ablation process at 2400 DEG C. The preparation method of the powder and the coating comprises the following steps: by taking ZrO2 and Yb2O3 with the purity of 99.9% as raw materials, preparing single-phase Yb2O3 fully-stable ZrO2 powder with relatively high flowability and apparent density by adopting modes of roller ball milling, spray granulation, vacuum sintering, plasma spheroidization and the like; and finally, the single-phase Yb2O3 fully-stable ZrO2 thermal protection coating is prepared through a plasma spraying technology, the prepared powder and coating have high-temperature phase stability, and the coating has ultra-high-temperature long-time oxidation ablation resistance.

The application is a preparation method of in-situ synthesis of ODS multi-principal element alloy powder. The method uses in-situ oxidation in the thermal spraying process and selective oxidation of Al or Cr in the alloy powder to introduce nano-oxides, and realizes uniform distribution of the nano-oxides in the alloy powder by high-speed impact and spatter of the powder at the liquid surface in the spraying process. After the spraying is completed, the alloy powder is rapidly cooled in the cooling liquid and still maintains the spherical shape. The ODS alloy powder prepared by the application has the advantages of uniform distribution of oxide particles in the powder and high powdering efficiency, and the microstructure of the ODS alloy powder can be controlled by adjusting the composition ratio of the raw material powder and the spraying process.

The utility model belongs to the technical field of furnace roller thermal spraying, and particularly relates to a furnace roller thermal spraying clamping tool which comprises a working table, a mounting plate is mounted at the top of the working table, a supporting column is fixedly mounted at the top of the mounting plate, a lower arc plate is fixedly mounted at the top of the supporting column, an upper arc plate is hinged to the top of the lower arc plate, and the upper arc plate is hinged to the top of the upper arc plate. According to the furnace roller cleaning device, the upper arc plate which is opened and closed is closed to the top of the lower arc plate, then a threaded column is rotated, so that an arc-shaped abutting plate is attached to the outer surface of the furnace roller, the heating wire on the inner wall of the lower arc plate is powered on, the friction assembly is installed in the upper arc plate, and the friction assembly is used for conducting friction cleaning on the outer surface of the furnace roller. The outer surface of the furnace tube is preheated, and the arc-shaped abutting plates rub and clean the outer surface of the furnace roller, so that the effect of preheating and cleaning the outer surface of the furnace roller is achieved.

The invention discloses an automatic placing and conveying control method for a reinforcing steel bar thermal spraying production line, relates to the technical field of production control, and aims to solve the problem of low production efficiency. The method comprises the following steps: dividing a steel bar into a plurality of sections, marking smoke sensors distributed in each section, when the steel bar to be sprayed enters a spraying operation area, collecting smoke concentration data of each marked smoke sensor, analyzing the smoke distribution state of each divided section, and evaluating section spraying quality-effect characteristics in combination with spraying flow data of a spray gun; whether the conveying distance of the current to-be-sprayed reinforcing steel bar needs to be adjusted or not is judged, the duty ratio coefficient of the spray gun and the reinforcing steel bar placing jitter data before the conveying distance is adjusted are collected, calculated and fused to obtain reinforcing steel bar conveying characteristics, the conveying distance is corrected according to the reinforcing steel bar conveying characteristics, and the adjusting effect is further verified based on the smoke concentration peak value; and the environment stability of the spraying area and the consistent spraying quality are ensured.

The invention relates to the technical field of sucker rod production, and discloses a sucker rod anticorrosive coating spraying device which comprises an air duct surrounding a sucker rod in a clearance mode and allowing the sucker rod to penetrate through, thermal spraying gun heads spraying the sucker rod symmetrically penetrate through the two side walls of the air duct, and airflow output assemblies penetrate through the upper wall and the lower wall of the air duct. Each airflow output assembly comprises a first air inlet pipe penetrating through the wall of the air duct and an air distribution box connected to the inner end of the first air inlet pipe, the air outlet direction of the air distribution box is vertical and corresponds to the two sides of the sucker rod, and the four airflow output assemblies are vertically symmetrical; the airflow output assembly outputs airflow, so that the moving paths of the thermal spraying materials at the upper and lower ends are bent towards the sucker rod and are respectively attached to the upper and lower sides of the sucker rod; the double-side thermal spraying gun heads are used for oppositely spraying the two sides of the sucker rod which linearly penetrates through the double-side thermal spraying gun heads, and the airflow output assembly is used for changing spraying material spraying paths on the edges of the upper end and the lower end, so that originally lost spraying materials are focused on the upper side and the lower side of the sucker rod, and the utilization rate of the spraying materials is increased.

A two-shaft movable thermal spraying heat preservation device comprises a heat preservation module, a two-shaft movable platform and a spraying gun advance and retreat hole, and the heat preservation module comprises a front cover, a flame spray gun installation frame, a plasma flame spray gun, a flame baffle ring, a spraying bin, a pipeline bin, a machine cabinet, a pipeline channel and a rear cover; the two-axis moving platform comprises an integrated rack, an X-axis moving track, an X-axis servo motor, a Y-axis servo motor, a Y-axis moving track and fixing ground feet, the heat preservation module is arranged on the two-axis moving platform, and the X-axis servo motor or the Y-axis servo motor drives the heat preservation module to move along the X-axis moving track or the Y-axis moving track. The spraying bin and the flame baffle ring are both in interlayer design, water circulation cooling is carried out in the spraying bin and the flame baffle ring, damage of high temperature to the pipeline wiring harness and the plasma flame spray gun is prevented, and pipelines of combustible gas and cooling circulation water needed in the working process pass through the interior of the cabinet through the pipeline channel and are connected to the pipeline bin to be arranged and installed. Space is saved, and installation and fixation are facilitated.

The invention discloses a lap joint tailor-welding structure of an automobile integrated door ring and a manufacturing method, and belongs to the technical field of tailor-welding of automobile spare parts, and the automobile integrated door ring is prepared through an integrated process of heating stamping and in-mold quenching after a composite coating is thermally sprayed on the surface of thermal forming steel. The composite coating comprises the following chemical components in percentage by weight: 3%-8% of Y2O3, 5%-15% of TiN, 2%-6% of HfO2, 20%-35% of Al, 5%-12% of Si and the balance of Fe and inevitable impurities. By means of the mode, the welding strength is effectively improved through the innovative tailor-welding process of the composite coating plate and lap resistance spot welding.

The invention relates to a preparation method of a silicon-germanium rotating target material, which comprises the following steps: S1, preparing raw materials: preparing silicon powder and germanium powder, and mixing according to a required proportion; s2, powder mixing treatment is conducted, specifically, mechanical powder mixing is conducted through a V-shaped powder mixing machine, after powder mixing is finished, drying is conducted through a hot air drying oven, it is guaranteed that powder is dry, and adhesion is prevented; s3, the back pipe is pretreated, whether jumping and the thickness of the back pipe are normal or not is checked, and industrial alcohol is used for cleaning the surface of the back pipe. According to the preparation method of the silicon-germanium rotating target material, the silicon-germanium target material layer surrounding the base body pipe is formed by adopting the plasma thermal spraying technology, the silicon-germanium rotating target material which is high in structural density and free of cracks and has the length and thickness meeting the sputter coating requirement is obtained, the size of the silicon-germanium rotating target material is integrated, and the yield of the silicon-germanium rotating target material is improved. The length and the thickness of the silicon-germanium rotating target material are not limited, the preparation process of the silicon-germanium rotating target material can be simplified, and the preparation cost is reduced.

The present application discloses an abrasion-resistant non-stick cookware and a manufacturing method thereof, belonging to the technical field of kitchenware. The abrasion-resistant non-stick cookware includes a cookware substrate, and a composite thermal spraying layer is formed and adhered on the inner surface of the cookware substrate, and a non-stick layer is formed and adhered on the surface of the composite thermal spraying layer; the composite thermal spraying layer is attached to the surface of the cookware substrate by plasma thermal spraying process with composite particles, and the composite particles include metal particles and wear-resistant particles. The wear-resistant particles can reduce the porosity of the composite thermal spraying layer, improve the bonding force between the composite thermal spraying layer and the cookware substrate and the non-stick layer, and enhance the wear resistance and corrosion resistance of the composite thermal spraying layer, thereby prolonging the service life of the non-stick cookware.

The invention provides a low-temperature plasma spraying method for a heat-sensitive polymer matrix and a composite material, and belongs to the technical field of surface engineering. According to the method, through a system process of matrix surface pretreatment, spraying powder drying and low-temperature plasma spraying, the core is that a matrix active cooling technology is adopted in the range of 0-10 DEG C to isolate the plasma arc heat influence, and optimized sand blasting coarsening, powder granularity control and spraying process parameters are matched; and the compact Al2O3-TiO2 ceramic coating with high bonding strength is successfully prepared on a heat-sensitive epoxy resin matrix. The limitation that a traditional thermal spraying technology cannot be used for high polymer materials is broken through, the technological process is simple, the cost is low, and the obtained coating is excellent in abrasion resistance and suitable for meeting the requirement for high performance of the surface of the light high polymer material in the fields of electronic equipment, aerospace and the like.

This invention provides a multi-metal co-doped WC-Co coating and its preparation method, belonging to the field of metal-ceramic coating technology. The preparation method includes: weighing tungsten, yttrium, cerium, chromium, and vanadium sources, mixing and dissolving them in deionized water, adjusting the pH to 3-4, and obtaining a precursor through co-precipitation, washing, and drying; subjecting the precursor to sequential aerobic calcination, hydrogen reduction, and carbonization treatments to generate a WC phase, resulting in a rare-earth-transition multi-metal co-doped WC-based composite material; using the WC-based composite material, cobalt powder, and additives as raw materials, spraying the raw materials onto the substrate surface via thermal spraying to form a multi-metal co-doped WC-Co coating. The WC-Co coating prepared by this invention incorporates four elements—yttrium, cerium, chromium, and vanadium—forming a multiple synergistic mechanism of grain refinement, interface strengthening, and decarburization inhibition, effectively improving the hardness, wear resistance, corrosion resistance, and toughness of the WC-Co coating.

This invention relates to a method for preparing a self-purifying stepped ring packing, belonging to the field of water pollution purification materials. The method comprises the following steps: after acid washing and activation of ceramic stepped rings, a neodymium-niobium-zinc precursor is sprayed onto the surface of the ceramic stepped rings using a thermal spraying method. A series of drying and calcination processes are then performed to coat the surface of the ceramic stepped rings with a neodymium-niobium-zinc composite oxide active coating. The coating accounts for 3.6% to 3.9% of the total mass of the self-purifying stepped ring packing and exhibits high activity in decomposing organic pollutants. This packing can stably remove organic pollutants from wastewater over a long period, requiring minimal maintenance and regeneration during use, and has broad application prospects in practical wastewater treatment.

The utility model discloses a steel structure anti-corrosion structure suitable for a marine environment. Comprising a steel member, an aluminum-based corrosion-resistant and stain-resistant composite coating and a carbon fiber reinforced composite layer, wherein the aluminum-based corrosion-resistant and stain-resistant composite coating is formed by thermally spraying a composite powder core wire formed by a cylindrical aluminum sheath and a corrosion-resistant and stain-resistant composite powder core filled in the aluminum sheath on the outer surface of the steel member, and the carbon fiber reinforced composite layer is arranged outside the aluminum-based corrosion-resistant and stain-resistant composite coating. According to the steel structure anti-corrosion structure suitable for the marine environment, the aluminum-based anti-corrosion stain-resistant composite coating has the hole sealing effect, is high in corrosion resistance and has the anti-fouling and sterilizing functions, corrosion of microorganisms in seawater to the anti-corrosion structure and the steel structure can be reduced, the corrosion resistance of the steel structure is further improved, and the service life of the steel structure is prolonged. According to the anti-corrosion structure, the aluminum-based anti-corrosion stain-resistant composite coating is combined with the carbon fiber reinforced composite layer, so that effective anti-corrosion and protection effects on the steel structure can be achieved.

In a method for forming an abradable material (36), the abradable material has at least 20% by volume rutile titania (44) and hBN (46). The method includes: blending a first titania powder having an oxygen debit of at least 5.0% with a second titania powder having an oxygen debit, if any, of less than 1.0%. The blend is thermal sprayed. The sprayed blend is then oxidized.

The invention discloses a system and a method for testing and measuring thermal jet ignition characteristics of an ignition source of a composite fuel tank fastener of an airplane. The testing system comprises an adjustable high-voltage direct-current charging power supply, a lightning current discharge unit for simulating a natural lightning environment, and a control, measurement and analysis unit for a thermal jet ignition test. According to the matching structure characteristics of the fastener carbon fiber composite material laminated plate, the correlation between the thermal spraying high-temperature airflow impact force and the thermal spark characteristics of the fastener carbon fiber composite material laminated plate interface and factors such as the matching structure of the fastener carbon fiber composite material laminated plate, climate environments such as temperature and humidity, lightning current electrical parameters and the like is obtained; a composite material fuel tank fastener ignition source thermal injection ignition characteristic database simulating the large aircraft flight environment is formed, and a foundation is laid for large aircraft composite material fuel tank ignition source lightning stroke multi-physical field modeling and ignition source mechanism and prediction algorithm research.

The present invention relates to the technical field of plasma thermal spraying, and discloses a plasma thermal spraying device for an anti-sticking and wear-resistant coating, including a workbench. A track is fixedly connected to the top of the workbench. A first chute is opened at the top of the track, and the first chute penetrates through the track and extends to the bottom of the workbench. A second chute is opened at the top of the workbench. A first connecting plate is fixedly connected to the bottom of the workbench. A threaded column is rotatably connected to the inner wall of the workbench through a bearing. The rotation of the threaded column is driven by a first motor to control the movement of the placement assembly. The end of the threaded column away from the workbench is rotatably connected to the first connecting plate through a bearing. By setting a rotating assembly, the spray head in the device is extended into the hollow material. Through the rotation of the spray head and the movement of the placement mechanism, the spraying operation inside the hollow material is facilitated, without the need for redundant settings, simplifying the operation process and improving work efficiency.

This invention discloses a chromium oxide-based coating, its preparation method, and its application. The preparation method of the chromium oxide-based coating of this invention includes the following steps: 1) dispersing ceramic particles and / or metal particles, chromium oxide particles, and a binder in water, wherein the particle size of the ceramic and metal particles is smaller than that of the chromium oxide particles, followed by spray drying to obtain composite particles; 2) thermally spraying the composite particles onto the surface of a substrate to obtain the chromium oxide-based coating. The chromium oxide-based coating of this invention possesses both high hardness and excellent toughness, exhibiting superior resistance to friction and wear, and can be used as a wear-resistant coating for the surface of metal parts, making it suitable for large-scale industrial applications.

The utility model discloses thermal spraying equipment for converting edible mushroom waste residues into feed grains, which relates to the technical field of edible mushroom waste residue treatment and comprises a thermal spraying tank, the thermal spraying tank comprises a tank body, a steam spraying pipe arranged in the tank body and a first steam inlet pipe, one end of the first steam inlet pipe extends into the tank body, and a feeding port is arranged at the top of the tank body. The bottom of the tank body is provided with a feed port, the bottom of the tank body is provided with a discharge port, the tank body is provided with a feed valve at the feed port, the tank body is provided with a discharge valve at the discharge port, the pipe wall of the first steam spray pipe is provided with steam spray holes, and a dust cover covers the steam spray holes. When granular powdery edible mushroom waste residues are added into the tank body through the feeding funnel, the edible mushroom waste residues can slide down along the inclined surface on the dust cover under the action of the umbrella-shaped dust cover, so that the edible mushroom waste residues cannot enter the steam spraying pipe to block the steam spraying holes or the steam spraying pipe, and the steam spraying pipe and the steam spraying holes are ensured to be smooth; and the steam is smoothly sprayed into the tank body through the steam spraying holes.

The present invention discloses a method for preparing a composite aluminum film. The method comprises first sandblasting a substrate surface; then spraying a 10-50 μm thick aluminum layer onto the substrate surface using a subsonic flame spraying technique; etching the aluminum layer prepared by thermal spraying in an acid solution to obtain a 4-8 μm aluminum layer; and then transferring the acid-etched aluminum layer to a polymer base film using a transfer technique to obtain the composite aluminum film. The method for preparing the aluminum film has high process controllability, a wide range of thickness selectivity, and excellent performance, thus having broad application prospects.

This invention discloses a high-thickness, high-purity MAX phase coating and its preparation method. The method includes: 1. Mixing a metal oxide and a carbon source, followed by high-energy ball milling and spray granulation to prepare spherical precursor powder; 2. Depositing a transition layer on a sandblasted substrate surface using plasma spraying, and then depositing the spherical precursor powder on the transition layer to form a precursor coating; 3. Immersing the substrate with the precursor coating in molten salt for electrolysis, causing the precursor coating to be electro-deoxidized and converted into a MAX phase coating. This invention employs a synergistic process of "plasma spraying-molten salt electrochemical conversion," converting the sprayed precursor coating into a MAX phase coating through in-situ electro-deoxidation in molten salt electrochemistry. This process has high deposition efficiency and avoids the defects of carbon loss, phase decomposition, and oxidation in the coating product when directly thermally spraying MAX materials. It achieves the preparation of a high-thickness, high-purity MAX phase coating, suitable for the field of surface protection.

The plasma torch according to the present invention rotates the generated plasma P along the central axis T and ejects it in the axial direction, and also causes the plasma P to melt the powder of the thermal spray material and discharge it to the outside from the front nozzle opening. The current vector and the magnetic flux vector are orthogonal. A vector of current flowing between the first discharge surface 39 of the cathode 36 and the second discharge surface 49 of the second electrode 41 in order to generate plasma P, and a vector of magnetic flux of a magnetic field synthesized by the first magnet 37, the second magnet 42, the third magnet M3, and the fourth magnet M4, are orthogonal.

The invention belongs to the technical field of plasma thermal spraying, and discloses a preparation method and application of niobium powder for plasma thermal spraying, and the preparation method of the niobium powder comprises the following steps: S1, primary sintering: uniformly mixing niobium oxide and niobium carbide, then carrying out compression molding, and carrying out primary vacuum reduction sintering to obtain hydrogenated primary niobium; the primary sintering is segmented sintering: in the first stage, the sintering temperature is 1100-1200 DEG C; in the second stage, the sintering temperature is 1500-1600 DEG C; in the third stage, the sintering temperature is 1900-2000 DEG C; s2, primary niobium powder is prepared; s3, secondary sintering: firstly, uniformly mixing the primary niobium powder with a forming agent, then carrying out compression molding, and carrying out secondary vacuum sintering at the sintering temperature of 1900-2100 DEG C to obtain hydrogenated secondary niobium; and then, the hydrogenated secondary niobium is sieved and dehydrogenated to obtain niobium powder. The niobium powder preparation method has the advantages of being simple in technological process, high in production efficiency, low in energy consumption, small in pollution and the like, and the prepared niobium powder is uniform in particle size and low in oxygen content and completely meets the use requirement of thermal spraying.

This invention discloses a preparation process for high-carbon ferrochrome based on plasma spheroidization technology, belonging to the field of powder metallurgy. The process involves crushing and ball milling high-carbon ferrochrome blocks to obtain pre-formed powder, adding tannic acid, urea, nickel acetate tetrahydrate, and citric acid for coating, followed by spray drying. After pre-reduction carbonization in an argon-hydrogen atmosphere, the powder is then spheroidized using a radio frequency inductively coupled plasma torch. In-situ nanostructure growth is achieved in a mixed atmosphere of argon, hydrogen, and acetylene. Nickel acetate is reduced to catalytically active elemental nickel nanoparticles under the action of hydrogen and carbon monoxide. The powder is then cooled, graded, and inertly encapsulated to obtain a high-sphericity, low-oxygen-content, high-carbon ferrochrome-based core-shell structured spherical powder. The process flow of this invention is continuous and controllable, effectively improving powder flowability, bulk density, hardness, and corrosion resistance, and is applicable to additive manufacturing, thermal spraying, and powder metallurgy forming.

The invention relates to a cathode part for a device for thermal spraying, in particular for atmospheric plasma spraying and / or protective gas plasma spraying and / or vacuum plasma spraying, with a base body having a longitudinal axis, with a powder channel extending along the longitudinal axis for guiding powder particles from an input side of the cathode part to an output side of the cathode part through the cathode part.

This application relates to the technical field of ceramic materials, and particularly to a preparation method for producing yttrium oxide spraying powder by hydrothermal method, which comprises the following steps: preparing slurry by adding water to yttrium hydroxide - hydrothermal treatment - calcination - grinding - modification - granulation - degumming - screening - impurity removal; the preparation method for producing yttrium oxide spraying powder by hydrothermal method in this application enables yttrium hydroxide to form an effective crystallization mechanism through specific hydrothermal treatment and specific surface modification, so that the yttrium oxide slurry has good suspension property, the compacted density of the powder after granulation is large, the strength is high, it is not easy to break, and the use effect is good; the spraying powder with good crystal lattice has a white coating appearance under the thermal spraying process, high bonding strength with the substrate, and low cost.