With the development of cutting-edge science and technology such as aerospace, electronics, and military industry, the application of special ceramic coatings has continued to develop at a high speed. Compared with monolithic ceramic materials, high-performance coatings can organically combine the strength and toughness, ease of processing, electrical and thermal conductivity of metal materials with the high temperature resistance, high wear resistance and high corrosion resistance of ceramic materials. Give full play to the comprehensive advantages of the two types of materials. Nano-composite ceramic coatings can be applied to a variety of matrix materials such as non-ferrous metals, glass, and resin plates. The nano-composite zirconia ceramic coating is characterized by high temperature resistance and good heat insulation. It is a special ceramic coating material with wide application and mature technology.
From the perspective of the development direction of nano-composite zirconia ceramic coatings, not only in high-end fields such as military industry, but also in the civilian field, they are gradually beginning to exert their abilities. Midea, Foxconn, TCL and other units are all nano-composite zirconia ceramic coating Those who love it are actively trying to apply these advanced nanotechnology to their own products. Why are these big cattle civil enterprises so fond of nano-composite ceramic coatings? This can be concentrated into three points:
A. The advantages of metal and ceramic complement each other, combining rigidity with flexibility;
B. The need for special performance and special working conditions;
C. Workpiece shape and size and economic benefits are more cost-effective solutions.
2. Three elements for preparing nano composite zirconia ceramic coating
No matter what kind of functional coating, it is determined by the working conditions.
1. Preparation of nano composite zirconia ceramic spray powder
In the preparation of nano-composite zirconia ceramic spray powder, "two controls, choose one place", "two controls" is the purity and impurity control, crystal particle size (nano level) and temperature control of nano-composite zirconia ceramic spray powder; "Is the choice of solid-liquid separation and additives in the preparation process;" one place "is powder dispersion and interface treatment.
2. Spraying equipment
As one of the elements of the preparation of nano-composite zirconia ceramic coating, the choice of spraying equipment needs to start with the matching of power, stability and functional system.
3. Spraying process and coating post-treatment
Spraying process and coating post-treatment are also important elements for the application of nano-composite zirconia ceramic spray powder. Pretreatment of workpiece and temperature control of the workpiece are required, the spraying distance and power are adjusted, the powder feeding and powdering rate (deposition rate), etc. Finally, sealing treatment is needed to increase the service life of the workpiece.
III. Conventional application of nano-composite zirconia ceramic coating
Nanocomposite zirconia ceramic coating is routinely used for thermal barrier coating, isolation and corrosion protection.
4. Nanocomposite ceramic coating innovation and low-cost application
High-temperature resistant nano-composite zirconia functional ceramic coating innovation and application, high temperature resistance and thermal shock resistance, suitable for metal surfaces, thermal insulation and corrosion protection.
Nano composite ceramic functional coating innovation and low cost application
A. It is suitable for high-temperature functional coatings on the surfaces of metals, graphite, ceramics, ceramic fibers and glass;
B. It is suitable for special functional ceramic coatings on the surface of metals, graphite, ceramics and ceramic fibers, glass and wood at room temperature.
Why do we need nano composite zirconia ceramic coating?
2020 05/25