Mo对Fe-Nb-B非晶热稳定性和软磁性能的影响  

Influence of Partial Replacement of Fe by Mo Element on Thermal Stability and Soft Magnetic Properties of the Fe-Nb-B Amorphous Alloys

作　　者：朱满[1] 姚丽娟[1] 陈思思[1] 许军锋[1] 张雷[1] 坚增运[1] 常芳娥[1] 

机构地区：[1]西安工业大学,陕西西安710021

出　　处：《稀有金属材料与工程》2016年第3期715-719,共5页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展计划("973"项目)(2011CB610403);国家自然科学基金项目(51071115;51171136;51301125;51401156);陕西省教育厅科研计划项目(2013JK0907);西安工业大学校长基金(XAGDXJJ1111);陕西省大学生创新创业训练计划项目(1334)

摘　　要：研究了Mo元素部分替代Fe元素对Fe-Nb-B非晶热稳定性和软磁性能的影响。结果表明,Fe基非晶的晶化过程与合金中Mo含量密切相关,当Mo含量为1%和3%(原子分数)时,合金经历2次晶化过程;而当Mo含量为5%时,合金仅经历1次晶化过程。添加Mo元素能够有效提高Fe基非晶的玻璃化转变温度T_g和晶化起始温度T_(x1)。随着合金中Mo含量的增加,Fe基非晶的热稳定性显著改善,而非晶形成能力则略有降低。Fe_(70)Nb_6B_(23)Mo_1合金具有较低的玻璃化转变温度T_g(=830 K)和较宽的过冷液相区宽度ΔT_x(=53 K),具有最佳的非晶形成能力,与热力学参数P_(HS)的预测结果相一致。Fe_(71-x)Nb_6B_(23)Mo_x(x=1,3,5)非晶薄带具有较高的饱和磁感应强度M_s和低的矫顽力H_c,M_s值为60~84(A·m2)·kg^(-1)。Fe基非晶合金热稳定性的高低与其软磁性能具有一致性,即高热稳定性的非晶合金具有更优异的软磁性能。The influence of partial replacement of Fe by Mo element on thermal stability and soft magnetic properties of the Fe-Nb-B amorphous alloys was investigated.The results indicate that the crystallization behavior of the Fe-based amorphous alloys is dependent on the Mo content.The alloys containing 1 at% Mo and 3 at% Mo undergo two-stage crystallization,while the alloy containing 5 at% Mo undergoes single crystallization.The addition of Mo element is beneficial to increase the glass transition temperature Tg and the onset crystallization temperature T（x1）.As the Mo content increases,the thermal stability is enhanced and the glass forming ability（GFA）decreases slightly.The Fe（70）Nb6B（23）Mo1 alloy presents the largest GFA with the low glass transition temperature Tg（=830 K）and wide supercooled liquid region ΔTx（=53 K）,which agrees well with prediction of thermodynamic parameter P（HS）.The Fe（71-x）Nb6B（23）Mox（x=1,3,5）amorphous ribbons show good soft magnetic properties with high saturation magnetization（Ms）in the range of 60～84（A·m^2）·kg^-1 and low coercivity（Hc）.The Fe（71-x）Nb6B（23）Mox（x=1,3,5）amorphous alloys exhibit a correspondence between thermal stability and soft magnetic properties.

关 键 词：FE基非晶 热稳定性 非晶形成能力 过冷液相区 软磁性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]