Zirconia is a white heavy amorphous powder or monoclinic crystal, odorless, tasteless, almost insoluble in water. The melting point is about 2700℃, with high melting point and boiling point, hardness and strength, at normal temperature as an insulator, and high temperature has excellent properties such as electrical conductivity. In addition, the chemical properties of zirconia is very stable, insoluble in water, hydrochloric acid and dilute sulfuric acid, has good thermochemical stability, high temperature conductivity and high temperature strength and toughness, at the same time has good mechanical, thermal, electrical, optical properties.
Zirconia coating is prepared by plasma spraying, which is one of the common ceramic coatings. Plasma spraying technology uses plasma arc driven by direct current as a heat source, heating ceramics, alloys, metals and other materials to molten or semi-molten state, and spraying at high speed to the surface of the pretreated workpiece to form a firm adhesion surface layer. Plasma spraying to prepare zirconia coating, its main characteristics are as follows:
Be able to;
1, high temperature resistance: zirconia melting point is about 2700℃, often used in refractory materials, so zirconia coating has good high temperature resistance
Be able to;
2, wear resistance: zirconia ceramics have greater hardness and better wear resistance, its Mohs hardness is about 8.5, with good wear resistance;
3.Thermal barrier coating: The application of plasma spraying zirconia thermal barrier coating on gas engines has made great progress. To a certain extent, it has been used in the turbine part of gas turbines, which can significantly improve the durability of high-temperature components.
Stainless steel wire mesh with Zirconia coating are widely used on the high temperature working environment. The normal specifications has 60mesh/0.15mm and 30mesh/0.25mm.We can make the coating on both sides.This kind of material also can make the coating on the Nickel metal mesh.High purity zirconia coating can provide a layer of high temperature resistance, corrosion resistance for a variety of materials workpiece, especially with aluminum, molybdenum, platinum, rhodium and titanium these metal materials bonding more stable.It is especially suitable for coating on the heating element of high temperature furnace, which can prolong its service life.
Post time: Mar-30-2023