PVD coatings have a strong correlation with components in the aerospace sector.
1) Corrosion resistance: PVD coatings provide excellent corrosion protection for workpieces, enabling them to maintain good performance in supermarkets and corrosive environments. This characteristic is particularly weighty for parts in the aerospace sector, which are often exposed to harsh operating environments such as high temperatures, high pressures and chemical corrosion.
2) Improved wear and high temperature resistance: PVD coatings reduce the coefficient of friction of the coated surface, improve fuel economy and provide excellent high temperature resistance. In the aerospace industry, PVD coatings are commonly used on high-temperature components such as turbine blades, turbine discs and compressor blades of aero-engines to prevent oxidation and corrosion on the blade surface, delay the fatigue failure of the blades, and improve the reliability and life of the engine.
3) Bonding and coating thickness: PVD coatings provide good bonding between the PVD coating and the substrate and can provide stable performance. Typical PVD coating thickness is usually 4um. Although the bonding between the PVD coating and the substrate is poorer compared to CVD technology, the advantages of PVD coatings include lower process temperatures, which maintains the sharpness of the edge, compressive residual stresses to stop the spread of cracks in the coating, finer grains (smoother), and higher hardness to achieve non-equilibrium compositions, which is not possible with CVD processes.
The application of PVD coating technology in the aerospace sector not only improves the corrosion and wear resistance of components, but also enhances the high temperature resistance of high temperature parts, thus guaranteeing the safe operation and long term reliability of the equipment.