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 %.

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.

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.