Advantage
1. Excellent high-temperature protection performance
It can form a stable protective layer in high temperature environments, effectively block heat transfer, prevent direct corrosion of the substrate material by high temperatures, and protect the substrate from deformation, melting, oxidation, and other damage caused by high temperatures. For example, the high-temperature components of the combustion chamber of an aircraft engine can work normally in a high-temperature environment of over a thousand degrees Celsius after being coated with a high-temperature resistant coating on the surface, greatly extending the service life of the components.
2. Improve the high-temperature resistance of materials
Some matrix materials with limited high-temperature resistance can adapt to higher temperature conditions by coating them with high-temperature resistant coatings. For example, ordinary stainless steel materials may experience performance degradation after prolonged use at high temperatures, but after coating with suitable ceramic high-temperature resistant coatings, they can maintain good performance at higher temperatures, expanding the application range of the material.
3. Antioxidant and corrosion-resistant
In high-temperature environments, there is often a strong oxidizing atmosphere and various corrosive media. High temperature resistant coatings usually have good oxidation resistance, which can inhibit the reaction between the substrate material and oxidizing substances such as oxygen. At the same time, they can also resist the erosion of corrosive components such as sulfur and chlorine at high temperatures, ensuring the integrity and stability of the substrate. In high-temperature industrial kilns, lining materials coated with high-temperature resistant coatings can better cope with corrosive components in high-temperature gases.
4. Possess certain thermal insulation performance
Partial high-temperature resistant coatings not only provide protection, but also effectively block heat transfer and serve as insulation. This is very important for some application scenarios that require controlling heat loss, reducing energy consumption, or avoiding the impact of high temperatures on surrounding components. For example, in the thermal protection system of spacecraft, high temperature resistant insulation coatings can reduce heat transfer into the interior of the spacecraft, ensuring that internal equipment and astronauts are in a suitable temperature environment.
5. Strong customizability
High temperature resistant coatings that meet specific requirements can be customized based on different substrate materials, high-temperature environmental conditions (such as temperature range, environmental media, etc.), by selecting different coating materials, formulations, and preparation processes, to adapt to diverse high-temperature application scenarios in industrial, aerospace, and other fields.
shortcoming
1. High cost
The materials used in high-temperature resistant coatings, especially high-performance ceramic materials (such as silicon carbide, silicon nitride, etc.), high-temperature alloy materials, etc., are expensive and their preparation processes are often complex, requiring special equipment and strict process control. For example, in the thermal spray coating process, strict requirements for spray parameters and environment lead to high production costs of high-temperature resistant coatings, limiting their promotion and use in some cost sensitive large-scale application scenarios.
2. Difficulty in bonding coating and substrate
Due to the significant differences in physical and chemical properties between high-temperature resistant coating materials and many substrate materials (such as metal substrates), achieving good bonding is not an easy task. For example, there are problems such as mismatched thermal expansion coefficients between ceramic coatings and metal substrates, which can easily cause internal stress due to temperature changes during use, leading to coating peeling, cracking, and other failure situations. Various complex measures such as transition layer design and substrate surface pretreatment need to be taken to enhance adhesion, but sometimes the effect may not fully reach the ideal state.
3. Easy to encounter thermal stress problems
During the repeated heating and cooling process in high temperature environments, high-temperature resistant coatings will generate thermal stress due to their different coefficients of thermal expansion from the substrate material. If this thermal stress accumulates for a long time, it is easy to cause damage to the coating, such as cracks, delamination, and other phenomena, which seriously affect the protective and thermal insulation functions of the coating. Even if some measures are taken to alleviate the thermal stress, it is difficult to completely eliminate its impact, and regular testing and maintenance of the coating condition are needed.
4. Relatively weak resistance to mechanical impact
Compared to some ordinary protective coatings, high-temperature resistant coatings often have poor resistance to damage when subjected to external impacts such as collisions, friction, etc. For example, in some high-temperature industrial scenarios with high-speed particle erosion (such as high-temperature pipelines in thermal power plants), if the coating itself lacks mechanical impact resistance, it is easy to cause local damage, which in turn affects the overall protective effect. Additional measures to enhance impact resistance need to be taken to ensure the normal use of the coating.

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