34 results about "Suspension plasma spray" patented technology

The invention relates to a slurry for suspension plasma spraying and a method for forming sprayed coating. The invention provides a slurry for use in suspension plasma spraying including a dispersionmedium and rare earth oxide particles, the rare earth oxide particles having a particle size D50 of 1.5 to 5 [mu]m and a BET specific surface area of less than 1 m2 / g, and a content of the rare earthoxide particles in the slurry being 10 to 45 wt %.

The present invention relates to a preparation method for porous hydroxyapatite coatings. In particular, it is a method of using suspension plasma spraying to prepare porous hydroxyapatite coatings, which belongs to the technical field of biomedical material preparations. The present invention added a pore-forming agent into the hydroxyapatite suspension with a solid content of 16%-45%. After full stirring, the feedstock materials for plasma spraying were transferred into the injection system, and injected into the high temperature area of the central plasma flame. Then, the feedstock materials made the heat exchange with the high plasma flame of plasma spraying gun. Then the sprayed raw materials were subjected to breakup and refinement of the droplets, solvent evaporation, the decomposition and gasification of the pore-forming agent and melting of feedstock materials. Finally, the porous hydroxyapatite coatings are directly deposited onto the substrate surfaces of the biomedical materials.

Provided is a slurry for suspension plasma spraying, which is a spray material used for suspension plasma spraying in an atmosphere including an oxygen-containing gas, contains 5-40 mass% of rare earth fluoride particles having a maximum particle diameter (D100) of 12 mum or less, and contains one or more types of solvent selected from among water and organic solvents. A rare earth acid fluoride-containing sprayed film, in which process shift and particle generation hardly occur, can be stably formed on a base material by carrying out suspension plasma spraying in an atmosphere including an oxygen-containing gas. A spraying member provided with this sprayed film exhibits excellent corrosion resistance to halogen-based gas plasma.

The invention discloses a preparation method of a suspension plasma spray coating on the surface of a NdFeB magnet, comprising the following steps: (1) preparing a rare earth suspension; (2) using the suspension plasma spraying technology to spray the two sides of the NdFeB magnet , to obtain a suspension plasma spray coating; (3) The magnet after spraying is treated by grain boundary thermal diffusion method. Plasma spraying technology combined with grain boundary thermal diffusion technology has the characteristics of high production efficiency and environmental friendliness, which can effectively increase the diffusion depth of heavy rare earth elements in magnets, promote the improvement of magnetic properties, and also help accelerate the industry of grain boundary diffusion technology. process.

A slurry for use in suspension plasma spraying including a dispersion medium and rare earth oxide particles, the rare earth oxide particles having a particle size D50 of 1.5 to 5 μm and a BET specific surface area of less than 1 m2 / g, and a content of the rare earth oxide particles in the slurry being 10 to 45 wt %.

The invention relates to a micron-order supersonic speed suspension plasma spraying device and method. Pinhole type internal feeding powder feeding design is provided, a powder feeding mechanism commonly using a Laval type plasma spraying gun on engineering is transformed, sprayed powder (the grain size ranges from 500 nanometers-150 micrometers), absolute ethyl alcohol, an additive and deionizedwater are reasonably matched, and stable liquid slurry capable of achieving sufficient suspension is obtained; and a mechanical peristaltic pump is used for conveying the suspended liquid slurry to animproved pin type internal feeding opening of the supersonic speed Laval spraying gun, and after the suspension slurry and supersonic speed plasma jet flow generate sufficient heat exchange, the suspension slurry is deposited on a base plate through a supersonic spraying process to form a coating. The grain size of particles needing to be sprayed by the spraying device can reach 150 micrometers,the shape, the slurry viscosity and the fluidity of the sprayed powder are free of limitation, the deposition efficiency can reach 5-7 micrometers per pass, and the coating preparing efficiency can beimproved by nearly 7 times.

The present invention relates to a method for coating at least one surface of a solid substrate with at least one layer comprising at least one ceramic compound by the technique of Suspension Plasma Spraying (SPS), wherein at least one solid particle of at least one ceramic compound injecting the suspension into a plasma jet and subsequently projecting a hot jet containing the solid particle suspension onto the surface of the substrate, whereby a layer containing at least one ceramic compound is formed on the surface of the substrate; the method is characterized in that, at In the suspension, at least 90vol% of the solid particles have a larger size (called d 90 ), such as a diameter of less than 15 μm, preferably less than 10 μm, and at least 50 vol% of the solid particles have a larger size, such as diameter (referred to as d 50 ) is not less than 1 μm. The invention also relates to a substrate coated with at least one layer obtained by the method. The invention also relates to components comprising said coated substrate. The invention also relates to the use of said layer to protect solid substrates from degradation caused by contaminants such as CMAS.