Enhancement of glass-forming ability of FeCoNiBSiNb bulk glassy alloys with superhigh strength and good soft-magnetic properties
Enhancement of glass-forming ability of FeCoNiBSiNb bulk glassy alloys with superhigh strength and good soft-magnetic properties
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DOI：
10.1063/1.2757013
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发表时间：
2007-07
影响因子：
3.2
通讯作者：
B. Shen;Chuntao Chang;Zhefeng Zhang;A. Inoue
中科院分区：
文献类型：
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作者：
B. Shen;Chuntao Chang;Zhefeng Zhang;A. Inoue
研究了添加Zr对[(Fe0.6Co0.3Ni0.1)0.75B0.2Si0.05]96−xNb4Zrx系FeCoNiBSiNb非晶合金非晶形成能力的影响。除了玻璃化转变温度从818K提高到822K，过冷液相区从60K提高到65K外，1at.%的Zr还能有效地使合金接近共晶点，并使液相线温度从1427K降低到1400K，从而增加了GFA。采用铜模铸造法制备了直径可达6 mm的[(Fe0.6Co0.3Ni0.1)0.75B0.2Si0.05]95Nb4Zr1块体非晶合金。BGA具有超高的断裂强度4180 Mpa，杨氏模量200 Gpa，弹性应变0.02。玻璃合金也表现出良好的软磁性能，饱和磁化强度为1.1T，较低的矫顽力为2 A/m，在1 kHZ下的磁导率为16 700，磁场强度为1 a/m。
The effect of Zr addition on the glass-forming ability (GFA) of FeCoNiBSiNb glassy alloys in [(Fe0.6Co0.3Ni0.1)0.75B0.2Si0.05]96−xNb4Zrx system was investigated. In addition to slight increases of glass transition temperature from 818to822K and supercooled liquid region from 60to65K, the 1at.% Zr addition was found to be effective in approaching alloy to a eutectic point as well as decreasing liquidus temperature from 1427to1400K, resulting in an increase in GFA. By copper mold casting, [(Fe0.6Co0.3Ni0.1)0.75B0.2Si0.05]95Nb4Zr1 bulk glassy alloys (BGAs) with diameters in the range up to 6mm were produced. The BGA exhibits a superhigh fracture strength of 4180MPa, and Young’s modulus of 200GPa, combined with an elastic strain of 0.02. The glassy alloy exhibits good soft-magnetic properties as well, i.e., rather high saturation magnetization of 1.1T, low coercive force of 2A∕m, and high permeability of 16 700 at 1kHz under a field of 1A∕m. The reason why only 1at.% Zr is effective in improving GFA and the f...