Powerful magnets, which can be obtained with the use of rare earth metals, has long attracted the attention of engineers, as a basic component for the construction of small and high-performance motors and generators. Thus far, however, the high cost of obtaining the necessary alloys through traditional metallurgical processes has been an obstacle to the widespread dissemination SuperMagnets. According to the group of researchers from the University of North-east, they were able to solve this problem by proposing a new manufacturing nanotechnology materials based on rare earth compounds - namely, samarium-cobalt permanent magnets, the most powerful of all known today.
Primenyavshiysya still metallurgical method of samarium-cobalt magnets is a multistage, and its cost in no small measure due to the need to ensure a vacuum when melting salts with samarium cobalt, to avoid unnecessary education oxides. Instead, the newly developed technology involves deposition of nanoparticles forming dipole size 10 x 100 nm, high-temperature solution of salts and samarium cobalt, mixed in proportion, in one stage. As a protection against oxidation dipoles use of polyvinyl coating, and the result is to obtain tehprotsessa black powder that can show strong magnetic properties.
According to the researchers, can be used repeatedly used in developed tehprotsesse chemicals, and scale industrial production in size. Potential areas of application are relatively inexpensive SuperMagnets hybrid cars, as well as equipment for the aerospace industry. In particular, samarium-cobalt magnets can be used in aircraft turbines, where many other rare earth magnetic materials not suitable because of too high temperatures.
|
