The phase structure, magnetic properties and corrosion resistance in the as-spun and annealed (Fe_0.7Co_0.15Ni_0.15)₇₅B₂₁Nb₄ metallic glasses (MGs) were investigated. Annealing below glass transition temperature at 693 K causes a reduction in coercivity and ameliorates the soft magnetic properties, originating from the formation of a homogeneous glassy structure. The hysteresis loops of the as-annealed ribbons, especially the 888 K-annealed one, appear to be more rectangular in their geometry, showing that the approach to saturation becomes more expeditious. The synergy of amorphous phase and nano-size magnetic α-Fe(Co) phase in the 753 K-annealed ribbon leads the improvement of saturation magnetization. The corrosion behaviors in seawater solution have been investigated by electrochemical polarization measurement. By evaluating the corrosion potential and current density, annealing treatment induces the detrimental influence in the general corrosion resistance of MG ribbons. However, compared with as-spun amorphous state, the 693 K-annealed relaxation ribbon exhibits superior passivity with lower passive current density and higher pitting resistance as revealed by wider passive region.

研究了初生和退火的（Fe _0.7 Co _0.15 Ni _0.15）₇₅ B ₂₁ Nb ₄金属玻璃（MGs）的相结构，磁性和耐腐蚀性。低于693 K的玻璃化转变温度进行退火会导致矫顽力降低，并改善软磁性能，这是由于均质玻璃结构的形成所致。退火后的碳带（尤其是888 K退火的碳带）的磁滞回线的几何形状看起来更矩形，这表明达到饱和的方法变得更加快捷。非晶相与纳米磁性α的协同作用753 K退火带中的-Fe（Co）相导致饱和磁化强度的提高。通过电化学极化测量研究了海水溶液中的腐蚀行为。通过评估腐蚀电位和电流密度，退火处理对MG带的总体耐蚀性产生了不利影响。但是，与初生非晶态相比，693 K退火弛豫带显示出更高的无源性，具有更低的无源电流密度和更高的抗点蚀性，如更宽的无源区所揭示。