In the vast journey of universe exploration, the continuous progress of aerospace science and technology cannot be separated from the support of high-performance materials. With its excellent performance, h-BN powder shines in the field of aerospace science and technology, becoming an indispensable key material.
h-BN powder, also known as white graphite, has a crystal structure similar to graphite. This unique structure gives h-BN powder a series of excellent physicochemical properties, such as high-temperature stability, high hardness, low coefficient of thermal expansion, excellent thermal conductivity, and excellent lubrication properties. These properties give it a unique advantage for application in the field of aerospace science and technology.
In high-speed spacecraft, friction with the atmosphere generates extremely high temperatures, which places high demands on the heat resistance of materials. h-BN powders are ideal for the preparation of high-temperature protective coatings due to their high-temperature stability. By combining h-BN powder with a ceramic substrate, it is possible to develop a coating material that can remain stable at extreme high temperatures. This coating not only extends the service life of spacecraft components, but is also successfully applied to turbine blades, nozzles, engine parts and other critical parts to effectively resist the erosion of high temperatures.
With the growing demand for lightweight design in aerospace science and technology, h-BN powder also shows its unique advantages. Its high strength, high hardness and low density characteristics make h-BN powder a key material for the preparation of lightweight high-temperature structural materials. By compounding h-BN powder with metal matrix (e.g., nickel, cobalt, iron, etc.), a structural material that is both lightweight and high-temperature resistant can be prepared. The application of this material not only reduces the weight of spacecraft, but also improves fuel efficiency and provides strong support for high-temperature and high-pressure components of spacecraft.
Inside the spacecraft, electronic devices generate a large amount of heat during operation, and efficient heat dissipation is crucial to safeguard device performance. h-BN powder, with its excellent thermal conductivity, is an excellent choice for the preparation of high-performance heat dissipation materials. By combining h-BN powder with a metal matrix (e.g. copper), heat dissipation materials with high thermal conductivity can be developed. Such materials have performed well in the heat dissipation applications of spacecraft electronics, improving the stability and reliability of the electronics and ensuring the safe operation of the spacecraft.
In addition, in the high-temperature and high-pressure spacecraft operating environment, the performance requirements for lubricants are extremely high. h-BN powder has become an ideal choice for lubricant additives due to its excellent lubrication performance. Incorporating h-BN powder into aerospace lubricants can significantly improve the lubricant's anti-wear, anti-oxidation and high temperature resistance. This improvement not only extends the service life of spacecraft components, but also reduces maintenance costs. It has been successfully applied to bearings, gears and other key components, significantly improving the lubrication effect.
