With the development of nanotechnology, the combination of nanotechnology and coating technology can leverage its comprehensive advantages to achieve excellent mechanical, thermal, and electromagnetic properties of materials, meeting the needs of their structural performance (strength, toughness, etc.) and environmental performance (wear resistance, corrosion resistance, high temperature resistance, etc.). Nano ceramic coatings have special physical and chemical properties, making them exhibit characteristics in functional protection that conventional materials do not possess. Therefore, nano ceramic coatings have broad application prospects in thermal insulation, anti-corrosion and rust prevention, insulation protection, self-cleaning and anti fouling, absorption and energy saving, sealing and high temperature resistance, etc.

fracture toughness
Fracture toughness is a performance indicator that reflects the resistance of materials to crack instability and propagation. In nanoceramic coatings, there exists a two-phase structure composed of matrix phase obtained by melting and solidification of nanoparticles and partially melted nanoparticles. When cracks propagate to the interface between unmelted or semi melted particles and matrix phase, these particles not only absorb crack propagation energy, but also have a restraining and deflecting effect on crack propagation. In conventional ceramic coatings, the bonding between layered structures is poor, and cracks are prone to propagate along the layers. Therefore, the toughness of nanoceramic coatings is better than that of conventional ceramic coatings.

hardness
Hardness is one of the important performance indicators of ceramic coatings.

The hardness of nanocoats has a low dependence on the heterogeneity of spraying process parameters and coating structure. The refinement of grain size results in a significantly higher hardness of nanoceramic coatings compared to micrometer ceramic coatings.

Wear resistance
The improvement of hardness and toughness in nanostructured coatings is the main reason for the improvement of wear resistance. During the wear process of nanoceramic coatings, there may be shear of micro convex bodies or incomplete melting of particles in pores that detach from the coating surface. These small particles disperse in the lubricating oil film between the coating and the friction part, playing a "micro bearing" role, reducing the friction coefficient of the coating and improving its wear resistance.

Bond strength
The bonding strength of ceramic coatings includes the interface bonding strength between the coating and the substrate, as well as the bonding strength of the coating itself. The effect of unexpanded interlayer cracks on the release of residual stress in the coating and the higher flight speed of nanostructured feed during the spraying process are beneficial for improving the bonding strength compared to ordinary powders. After nano powder spraying, the melting state of particles can be improved, resulting in a significant reduction in coating pores, and some pores are located inside the deformed particles, which helps to improve the bonding strength of the coating.

porosity
Appropriate coating pores are beneficial for lubricating friction and high-temperature insulation of workpieces, but harmful for corrosion resistance, high-temperature oxidation resistance, and high-temperature erosion resistance of workpieces. Research has found that porosity is related to flame temperature and velocity; It is also related to particle velocity, and as the particle velocity increases, the porosity tends to decrease.

Thermal conductivity
Thermal conductivity is the main performance indicator of thermal barrier coatings, which decreases with decreasing grain size. As the grain size decreases, the number of micro interfaces inside the coating increases and the interface distance decreases, resulting in a decrease in the average free path of particles during the heat conduction process and a decrease in the material's thermal conductivity.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150A. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.