About white corundum

Everyone knows that white corundum has the characteristics of high hardness, strong wear resistance, high temperature resistance, and so on, someone asked such a question, is the white corundum frit the same as the white corundum?

Structural characteristics of white corundum frit:

1, white corundum frit upper layer: also called cap, is divided into two parts of the upper base, the upper structure is tight and robust, there are porous flake crystals, the base has cylindrical holes of fine crystals. White corundum frit structure characteristics

2, white corundum frit core: the structure of the core is also tight and robust, and the porosity is larger. It should be noted that the core of the white corundum frit has many glassy crystals with holes and different shapes, and the main component of the crystals is β-AI203.

3. The middle and lower part of the white corundum frit: the crystal shape of the base is coarse, but the structure is still tight, and the color is white and good.

4, white corundum frit edge: the middle and lower crystals are not as tight as the upper two layers, slightly loose, and the crystals are mostly columnar or granular, with pores and microcrystalline crystals at the edge.

In the 1970s, more than 500 parts of wear-resistant materials were thermal sprayed in an aviation turbine engine, and more than 2,000 parts of wear-resistant materials have been thermal sprayed in modern new turbine engines, about 3,000 places. The thermal spraying of wear-resistant materials on parts has become an indispensable and important process technology in the aviation industry.

Wear-resistant materials such as white corundum in the aviation industry are the early application of thermal spraying technology coating departments, but also the application of thermal spraying technology more and more successful high-tech fields. With the continuous progress of thermal spraying technology, such as the continuous development of high-performance coating materials, low-pressure plasma spraying, high-speed flame spraying technology has come out one after another, and the coating quality has made a qualitative leap. The application of thermal spraying technology in the aviation industry is also more and more extensive.

The packing density of white corundum abrasive is 1.53-1.99g /cm3, and the packing density of abrasive is related to the particle size, particle size composition, type, particle shape and other factors. Generally, coarse-grained abrasives 1Have a higher packing density than fine-grained abrasives. The packing density of abrasive particles is greater than the single-particle density.The true density of white corundum abrasive: The density of white corundum abrasive particles is 3.95-4.0g /cm3, and the true density of abrasive refers to the mass of abrasive contained in the unit volume (excluding the volume of the opening).The white corundum abrasive of refractory material has high purity, good self-sharpness, acid and alkali corrosion resistance, high temperature resistance and stable thermal performance. Its hardness is slightly higher than that of brown corundum, toughness is slightly lower, purity is high and self-sharpening is good. Strong grinding ability, low heat, high efficiency, acid and alkali corrosion resistance, high temperature resistance, good thermal stability.