A kind of high-temperature wear-resistant ceramic coating and preparation method thereof

Abstract

The invention discloses a ceramic coating with high-temperature resistance and wear resistance. The ceramic coating is prepared from components in parts by weight as follows: aluminum oxide, silicon oxide, silicon carbide, silicon nitride, boron carbide, titanium carbide, magnesium oxide, zinc oxide, calcium oxide, a binder, a stabilizer and a thickener; the preparation method comprises steps as follows: aluminum oxide, silicon oxide, silicon carbide, silicon nitride, boron carbide, titanium carbide, magnesium oxide, zinc oxide and calcium oxide are subjected to ball milling respectively, then dried, sintered, ground, sieved and mixed, and mixed powder is prepared; the binder, the stabilizer, a defoaming agent and the thickener are added to the mixed powder and mixed uniformly. The ceramic coating has the advantages that the prepared coating has high high-temperature resistance and wear resistance, good surface compactness and high bonding capability; besides, the prepared coating is applied to the surface of equipment, so that the hardness and the surface compactness of the coating are increased after the equipment runs for a period of time, and the bonding property of the coating with a metal matrix is enhanced; besides, materials used during preparation are simple, and site operation is convenient.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a high-temperature wear-resistant ceramic coating and a preparation method thereof. Background technique [0002] High-temperature boilers, gas burners, flues and other high-temperature equipment in petroleum, chemical, metallurgy, coal and other industries generally suffer from serious corrosion and wear problems. The workload of equipment maintenance is heavy, and the efficiency is low and the loss is serious. [0003] al 2 o 3 Ceramics have excellent wear resistance and are attracting attention. Silicon carbide and silicon nitride are also important structural ceramics, which have attracted more and more attention. The preparation of a layer of ceramic coating on the metal surface can greatly prolong the service life of the equipment. However, the current process of preparing ceramic coatings on metal surfaces is relatively complicated, and traditional methods such as thermal sinter...

AI Technical Summary

Problems solved by technology

However, the current process of preparing ceramic coatings on metal surfaces is relatively complicated, and traditional methods such as thermal sintering and thermal spraying are commonly used.

Although the ceramic coating sprayed by thermal spraying protection technology (supersonic flame spraying, plasma spraying, etc.) has excellent high temperature abrasion resistance, its construction is difficult and the spraying cost is high, so it cannot be applied to the surface of various high temperature equipment.