To a certain extent, the aerospace industry can be regarded as an indicator of a country's industrial level. Countries attach great importance to the aerospace industry, precisely because it combines the dual missions of national defense and economic development.
In the aviation field, the "turbine engine" commonly used in aircraft propulsion systems needs to use magnets as its engine system, such as the engines commonly used in civil aviation passenger aircraft, cargo aircraft, and military aircraft: turbojet engines, turbofan engines, turbo shaft engines, etc. , Magnets play a key role in it. In addition, in aviation, its parts need to have the characteristics of high temperature resistance, corrosion resistance and oxidation resistance, which affects the types of magnets suitable for them.
Regarding aerospace, it generally refers to the navigation activities of sky vehicles outside the atmosphere. It is currently one of the most active and influential fields of science and technology. The DC motors on the propellers equipped with aerospace vehicles must have the ability to withstand high temperatures and resist mechanical shocks, which have similar considerations to airplanes.
The rare earth magnets that meet the environmental conditions of aerospace are samarium cobalt magnets. Samarium cobalt magnets are less affected by temperature and have good resistance to extreme temperatures. They can be effectively used in environments as high as 400°C or at sub-zero temperatures. In addition to temperature stability, samarium cobalt magnets also have chemical stability. The motor loaded with samarium-cobalt magnets can still operate stably in a harsh working environment, thereby ensuring the safety that is the most important for aviation and aerospace. The engine of an airplane or spacecraft cannot be started without magnets.