Fe-Cu-B base sintered material. (II) The mechanichal properites and cold-formability of Fe-Cu-B base sintered materials.

COERCIVITY AND THERMAL REMAGNETIZATION OF SINTERED Nd-Fe-B

Statistical methods are used to estimate coercivity J Hc and thermal remagnetization of uniaxially nucleationcontrolled permanent magnetic materials. Sintered Nd-Fe-B consists of the tetragonal magnetic Nd2FelrB phase with a volume fraction w = 80 % and of nonmagnetic phases. At temperatures above T, rz 150 K the tetragonal axis is the easy direction of magnetization [I]. It is well known [2] t...

Impulse Magnetization of Nd-Fe-B Sintered Magnets for Sensors

Magnetization of large Nd-Fe-B sintered permanent magnets is still challenging. This type of permanent magnet is electrically conductive, so impulse magnetization causes a flow of eddy currents which prevent magnetization of the whole volume of the magnet. The paper deals with the impulse magnetization of sintered Nd-Fe-B permanent magnets and shows a method for the determination of suitable pa...

Laser processing and microstructure of Al-Cu-Fe quasicrystalline coatings on Al-base materials

There is a large interest in using high power lasers for surface alloying or cladding on aluminium alloys, in order to enhance hardness and to improve wear resistance. A partly quasicrystalline surface layer (QC) (Al-Cu-Fe coating) has been obtained by laser cladding on Al-base materials. In addition to crystalline phases (Al5Fe2 and AlisFe4t -with dissolved copper), a quasicrystalline Al-Cu-Fe...

Corrosion Losses, Mechanisms and Protection Strategies for Sintered Nd-Fe-B Magnets

Key techniques for ultrahigh performance sintered Nd-Fe-B magnets preparation

Iron boron neodymium alloys are multiphase materials, typically processed slightly rich in Nd and B relative to the primary ferromagnetic phase in the system, Nd2Fe14B. Typically, most magnets contain 20-30 vol. % of nonmagnetic phases which are important for good magnetic properties. Powder metallurgy, melt pinning and mechanical alloying have been used to produce magnets although only the fir...