新型块体铁基非晶合金的形成与性能

Formation and Properties of New Bulk Fe-Based Metallic Glasses

利用铜模铸造法制备了(Fe100-xCox)74Mo6P10C7.5B2.5(x=0-15)新型块体铁基非晶合金。Fe-Co-Mo-P-C-B系块体非晶合金具有临界直径为4mm的高非晶形成能力,以及维氏硬度为10.6～10.85GPa的高硬度和饱和磁感应强度为0.98～1.07T的优异性能。研究结果表明,非晶合金硬度及饱和磁感应强度都随着Co含量的提高逐渐增加。合金的非晶形成能力则与Co的含量密切相关。适量Co的添加扩大非晶合金的过冷液体区间(ΔTx)及增加γ值,从而提高非晶合金的热稳定性及其非晶形成能力。

Bulk （Fe100-xCox）74Mo6P10C7.5B2.5（x=0-15） metallic glasses are synthesized by copper mold casting, which have a critical diameter up to 4 mm, high microhardness of 10.6～10.85 GPa and high saturature magnetization of 0.98～1.07 T. Results show that the microhardness and saturation magnetization increase with Co content increasing. The glass forming ability correlates tightly to the Co content. Proper Co content enlarges the super cooled liquid region and enhances the value which results in enhanced thermal stability of supercooled liquid and high glass forming ability.