Mechanical and magnetic properties of (Fe72Mo4B24)100−xTbx (x = 4, 5, 6, 7 at.%) bulk glassy alloys
Mechanical and magnetic properties of (Fe72Mo4B24)100−xTbx (x = 4, 5, 6, 7 at.%) bulk glassy alloys
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DOI：
10.1016/j.jallcom.2010.06.061
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发表时间：
2010-08
影响因子：
6.2
通讯作者：
Hong Jian;W. Luo;S. Tao;M. Yan
中科院分区：
文献类型：
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作者：
Hong Jian;W. Luo;S. Tao;M. Yan
（Fe72Mo4B24）100−xTbx（x=4，5，6，7at.%）采用铜模铸造法制备了直径为2 mm的大块非晶合金。研究了Tb含量对玻璃形成能力的影响。当x=4时，合金中存在部分晶化，而当x=5，6，7时，合金中分别存在完全非晶态，没有可检测到的晶化。非晶态合金的DSC曲线表明，该体系具有较高的玻璃化转变温度（Tg=848- 927 K）和较宽的过冷液相区（可达104 K）。当x=5时，获得最佳的玻璃形成能力。这些块体金属玻璃具有良好的力学性能，其抗压强度高达3163 MPa，Hv高达1149。此外，合金还具有较好的软磁性能，Msup为69.205emu/g，Hcas为4 Oe。
(Fe72Mo4B24)100−xTbx(x=4, 5, 6, 7at.%) bulk glassy alloys with diameter of 2mm were prepared by copper mold casting. The influence of Tb content on glass forming ability was investigated. There is partial crystallization in the alloy when x=4, while fully amorphous alloys with no detectable crystallization are obtained for x=5, 6, 7, respectively. DSC curves of the amorphous alloys indicate that this system exhibits a high glass transition temperature (Tg=848–927K) and a wide supercooled liquid region up to 104K. The best glass forming ability is obtained for x=5. These bulk metallic glasses exhibit good mechanical properties, with the compressive strength up to 3163MPa, and Hvup to 1149. In addition, the alloys exhibit relatively good soft magnetic properties, with Msup to 69.205emu/g and Hcas low as 4Oe.