Micro-nano silicon carbide/calcium oxide stabilized zirconia spherical feed and preparation method thereof

A technology for stabilizing zirconia and silicon carbide, which is used in the field of micro-nano powder, micro-nano silicon carbide/calcium oxide stabilized zirconia spherical feeding and preparation, which can solve the problem of incomplete coating melting, coarse feeding particle size and inconsistent composition. Uniformity and other problems, to achieve the effect of low bulk density, fine powder particle size and uniform composition
CN113233893AActive Publication Date: 2021-08-10XIAN THERMAL POWER RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN THERMAL POWER RES INST CO LTD
Publication Date
2021-08-10

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Abstract

The invention relates to a micro-nano silicon carbide / calcium oxide stabilized zirconia spherical feed and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing a ZrOCl2.8H2O / Ca(NO3)2.4H2O mixed solution; step 2, adding excessive ammonia water into the mixed solution, and continuously stirring to generate white precipitate, so as to form a solution A; step 3, dissolving polycarbosilane in a p-xylene solution to form a solution B; step 4, adding the solution B and a PVA aqueous solution into the solution A to obtain a mixture; step 5, performing ball milling on the mixture in the step 4 in a roller ball mill to obtain ball-milled slurry; step 6, granulating the slurry subjected to ball milling on a spray granulator, and removing moisture to obtain dried spherical mixed powder of Zr(OH)4, Ca(OH)2 and polycarbosilane; 7, putting spherical powder obtained after granulation into a corundum crucible, putting the corundum crucible into a vacuum sintering furnace to be calcined under the high-temperature condition, and Zr(OH)4, Ca(OH)2 and polycarbosilane (PCS) are subjected to high-temperature decomposition to form uniform SiC / CSZ spherical feed.
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Description

technical field

[0001] The invention belongs to the micro-nano powder in the technical field of high-temperature protection, and specifically relates to a micro-nano silicon carbide / calcium oxide stabilized zirconia spherical feeding material and a preparation method. Background technique

[0002] As a special material, thermal barrier coating is coated on the surface of the hot end parts, which has a good heat insulation effect. It is usually used to reduce the influence of steam turbine or engine blades from high temperature environment, and reduce the impact of substrate wear, high temperature oxidation and other factors on the substrate. Destruction can greatly prolong the service life of the blade and increase the working temperature of the machine.

[0003] Calcia stabilized zirconia (ZrO 2 ) coating is currently the most promising thermal barrier material. Due to the tetragonal phase ZrO in the cooling process 2 The transition to the monoclinic phase will cause a v...

Claims

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