Fe- and Co-based bulk glassy alloys with ultrahigh strength of over 4000 MPa
Fe- and Co-based bulk glassy alloys with ultrahigh strength of over 4000 MPa
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DOI：
10.1016/j.intermet.2006.01.038
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发表时间：
2006-08-01
期刊：
影响因子：
4.4
通讯作者：
Chang, C. T.
中科院分区：
文献类型：
--
作者：
Inoue, A.;Shen, B. L.;Chang, C. T.
自1995年首次在Fe-(Al,Ga)-(P,C,B,Si)体系中合成铁基大块非晶合金以来，迄今为止已开发出许多铁基和钴基大块非晶合金，因为它们的合金有望表现出高机械强度和良好的软磁性能。表现出超过 4000 MPa 高断裂强度的 Fe 和 Co 基大块非晶合金的最大直径对于 Fe-Co-B-Si-Nb 系为 5 mm，对于 Co-Fe-Ta-B-Mo-Si 系为 3 mm。添加少量的铌或钽对于通过形成网络状原子构型来提高其玻璃形成能力至关重要。过冷液体的主晶相是亚稳态复合 FCC Fe23B6 或 Co23B6 相，因此导致亚稳态 Fe23B6 或 Co23B6 型相沉淀的局部原子构型的变化被认为在实现高玻璃形成能力中发挥着重要作用。 Fe-Co-B-Si-Nb合金的最高断裂强度达到4250 MPa，Co-Fe-Ta-B-Mo合金的最高断裂强度达到5545 MPa。断裂强度与杨氏模量、玻璃化转变温度或液相线温度有良好的线性关系。因此，可以得出结论，超高强度的起源归因于构成元素之间的强结合性质。考虑到1979年至1983年间开发的Fe-Si-B非晶合金丝在过去二十年一直被用作高强度材料，新开发的高强度铁钴基大块非晶合金有望利用其强度更高和三维材料形态的优势，作为新型超高强度材料。 (c) 2006 Elsevier Ltd. 保留所有权利。
Since the first synthesis of Fe-based bulk glassy alloys in Fe-(Al,Ga)-(P,C,B,Si) system in 1995, a number of Fe- and Co-based bulk glassy alloys have been developed up to date because their alloys are expected to exhibit high mechanical strength and good soft magnetic properties. The maximum diameter of Fe- and Co-based bulk glassy alloys exhibiting high fracture strength of over 4000 MPa is 5 mm for Fe-Co-B-Si-Nb system and 3 mm for Co-Fe-Ta-B-Mo-Si system. The addition of a small amount of Nb or Ta is essential for the increase in their glass-forming ability through the formation of network-like atomic configurations. The primary crystalline phase from supercooled liquid is a metastable complex FCC Fe23B6 or Co23B6 phase and hence the change to the local atomic configurations leading to the precipitation of the metastable Fe23B6 or Co23B6-type phase is thought to play an important role in the achievement of high glass-forming ability. The highest fracture strength reached as high as 4250 MPa for Fe-Co-B-Si-Nb alloy and 5545 MPa for Co-Fe-Ta-B-Mo alloy. The fracture strength has a good linear relation with Young's modulus, glass transition temperature or liquidus temperature. It is, therefore, concluded that the origin for the ultrahigh strength is attributed to the strong bonding nature among the constituent elements. Considering that Fe-Si-B amorphous alloy wires developed for several years between 1979 and 1983 have been used as high strength materials for the last two decades, the newly developed high-strength Fe- and Co-based bulk glassy alloys are expected to be used as a new type of ultrahigh strength material by utilizing the advantage points of much higher strength and three-dimensional material form. (c) 2006 Elsevier Ltd. All rights reserved.