Optimization of thermal stability and soft-magnetic properties of FeSiBPCuNb alloys by Nb content tuning

Development of FeSiBNbCu Nanocrystalline Soft Magnetic Alloys with High B s and Good Manufacturability

“…8 This effect of the Nb content has been confirmed in previous research. [27][28][29][30][31][32] Moreover, the increasing of the Nb content can obviously broaden the temperature interval between the two crystallizations and drastically increase the crystallization activation energy of E Tx1 and E Tx2 , resulting in easily controlling growth rates of a-Fe and the achievement of excellent soft magnetic properties and good thermal stability, which will enhance the manufacturability of the alloys.…”

Effect of Al addition on the glass forming ability, thermal stability and soft magnetic properties of (Fe0.83P0.16Cu0.01)100−xAlx nanocrystalline alloys

“…B 8000 of nanocrystalline S4 is 1.54T, which is slightly lower than that of S1 (1.64 T [12] ). Because the substitution of Fe by non-magnetic metals such as Al usually decreases the total Fe content of the alloy and then reduces its saturation magnetization [9,13,15,27] . When the proportion of Al increases from 1.5 to 2at.%, the saturation magnetization decreases from 1.54T to 1.48T, the increase of M A N U S C R I P T…”

“…The first and second crystallization onset and peak temperatures are labeled as T x1 , T x2 and T p1 and T p2 , respectively. The first exothermic peak (T p1 ) corresponds to the crystallization of α-Fe phase [9,16] and the second one (T p2 ) corresponds to that of Fe-P compounds [12] . It should also be noted that the onset temperature T x1 of the first crystallization process almost remains constant at about 633 K, while there is an obvious increase of T x2 with the increase of Al content, thus enlarging the temperature interval (∆T x ) between the two crystallization temperatures.…”

“…For the traditional FINEMET alloys in order to obtain amorphous precursors with good glass forming ability (GFA) certain amount of B addition is necessary to improve GFA [7,8] . Transition metals such as Nb [9] , Mo [10] and Zr [11] are also indispensible additions to inhibit the over growth of nanocrystals during annealing. However, these elements are all expensive and, as a result, the addition of one or more of them will increase the production cost which limits the mass application of these alloys.…”

The Structure and Porosity of Fe62-xCo10WyMexY8B20-y Alloys in the Amorphous and Crystalline States (where: Me = Mo, Nb; x = 0, 1, 2; y = 0, 1, 2)

“…In the second group of the alloys, in order to hinder growth of the crystalline grains, the element Nb was used. During the initial stages of crystallisation, Nb diffuses from the cr ystallisation front to the matrix between the crystalline grains [45,46].…”