Title :
New FeNbB based bulk amorphous and nanocomposite soft magnets for applications
Author :
Chiriac, H. ; Lupu, N.
Author_Institution :
National Inst. of Res. & Dev. for Tech. Phys., Iasi, Romania
Abstract :
The preparation and magnetic characterization over a wide frequency range of (Fe, Co, Ni)70Nb10B20 bulk amorphous and nanocomposite alloys are presented. Master alloys each prepared by induction melting in high vacuum were used to cast toroids, discs and bars by Cu mould casting method. X-ray diffraction and differential scanning calorimetry measurements show that the samples are either fully amorphous or consists of very fine nanoparticles embedded within the amorphous matrix. AC magnetic permeability of the samples were measured by using an AC-fluxmetric method in fields up to 1 kA/m. Curie temperature and thermomagnetic behavior were determined through a vibrating sample magnetometer.
Keywords :
Curie temperature; X-ray diffraction; amorphous magnetic materials; boron alloys; casting; cobalt alloys; differential scanning calorimetry; ferromagnetic materials; iron alloys; magnetic permeability; melt processing; nanocomposites; nanoparticles; nickel alloys; niobium alloys; particle reinforced composites; soft magnetic materials; AC fluxmetric method; AC magnetic permeability; Co70Nb10B20; Cu mould casting method; Curie temperature; Fe70Nb10B20; Ni70Nb10B20; X-ray diffraction; amorphous matrix; bars; bulk amorphous soft magnets; differential scanning calorimetry; discs; induction melting; magnetic characterization; nanocomposite soft magnets; nanoparticles; thermomagnetism; torroids; vibrating sample magnetometer; Amorphous magnetic materials; Amorphous materials; Cobalt alloys; Frequency; Iron; Magnetic field measurement; Magnets; Niobium alloys; Soft magnetic materials; Toroidal magnetic fields;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463694
