The magnetic material surface technology team of Rare Earth Materials Research Institute in Baotou Rare Earth Research Institute has used plasma spray-grain boundary diffusion method to improve the coercivity of a 50M magnet with heavy rare earth oxides by about 60% without reducing the remanence. This effect is comparable to that of magnetron sputtering metal terbium on the surface of magnets, while the processing efficiency is increased by two to three times and the cost is reduced by more than 50%, which has excellent market prospects.
Magnets are made up of atoms such as iron, cobalt and nickel, which have a unique internal structure and have their own magnetic moments. It creates an electromagnetic field and has properties that attract ferromagnetic chemicals such as iron, nickel, cobalt and other metals. According to the different characteristics, it can be divided into samarium cobalt magnet, NdFeb magnet, ferrite magnet, aluminum nickel cobalt magnet, rubber magnet and other types. They serve slightly different purposes.
Ndfeb magnet is a modern permanent magnet with strong magnetism, widely used in permanent magnet DC motor, communication, automotive electronics, magnetic mechanical equipment, aerospace, electronic computers, electrical products, medical machinery, magnetic decoration and other industries.
Permanent magnet ferrites are used for constant magnetic field applications in watt-hour meters, generator sets, phone sets, speakers, televisions and microwave heating components, as well as in voice recorders, pickups, speakers and various dashboards.
Samarium cobalt magnets, which operate at temperatures up to 300 degrees Celsius and are resistant to corrosion and oxidation, are now widely used in detectors, generator sets, radar detection, dashboards and other high precision cutting-edge technologies.
With science and technology to magnetic materials in all aspects of the performance of higher requirements, material surface technology has become an important means to improve the quality of materials, improve the performance of materials, thin film materials is becoming the basic elements of the construction of high-tech industry, surface engineering research will play a pivotal role in the study of materials science.
Under the combination of excellent experimental conditions and technical strength of universities, the magnetic material surface team of Baotou Rare Earth Research Institute has achieved a series of scientific research achievements: Zirconium - and rare-earth ytterbium - based amorphous biphase alloy films were prepared by alloying high concentration rare-earth ytterbium alloy alloy, and the adjustment of Young's modulus of zirconium - ytterbium alloy films was achieved, which laid a foundation for solving the brittle fracture problem of zirconium - based amorphous films. The modification of zirconium based amorphous alloy thin films by lanthanum and boron co-doping not only greatly improves the amorphous forming ability and mechanical properties of the amorphous alloy, but also increases the metallic zirconium content by 96.88% according to XPS, indicating that the oxide film thickness on the surface of the amorphous thin film is obviously thinner, indicating that it has better oxidation and corrosion resistance.
