Plasma-etching-resistant granulated yttrium oxide for hot spraying and preparation method thereof

Abstract

The invention belongs to the technical field of hot spraying, and particularly relates to plasma-etching-resistant granulated yttrium oxide for hot spraying and a preparation method thereof. The preparation method of the plasma-etching-resistant granulated yttrium oxide for hot spraying comprises the following steps: preparing nano or ultrafine yttrium oxide powder and deionized water or an organic solution into a paste, performing depolymerization and reduction, adding surface activity activator into the paste for preparation, and performing hot expansion balling and high-temperature densification treatment to obtain the granulated yttrium oxide for hot spraying. According to the invention, the surface activity activator is added into the paste before hot expansion balling, so that the prepared granulated yttrium oxide for hot spraying is favorable in spherical degree, and the high-spherical-degree favorable-flowability high-density granulated yttrium oxide for hot spraying can be obtained without later spheroidization, thereby achieving favorable flowability during hot spraying, ensuring that the supply of the granulated yttrium oxide for hot spraying is more stable, and providing a guarantee for obtaining a hot spray coating having a uniform thickness.

Description

technical field

[0001] The invention belongs to the technical field of thermal spraying, and in particular relates to a granulated yttrium oxide for plasma corrosion-resistant thermal spraying and a preparation method thereof. Background technique

[0002] Yttrium oxide has high melting point, phase stability and low thermal expansion, and is an important raw material for preparing high-performance electronic ceramics and anti-plasma corrosion spray powder. And the application of yttrium oxide in the fields of aviation, aerospace, and ceramics also shows its superior performance. It is mainly used to manufacture magnetic materials for microwaves and important materials for military industry. It is also used as an additive for optical glass, ceramic materials, and high-brightness for large-screen TVs. Phosphors and other kinescope coatings. It is also used to manufacture high-temperature strong heat-resistant alloys, aircraft nozzles, etc. In recent years, yttrium oxide powd...

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