Nanostructured Hypoeutectic Fe-B Alloy Prepared by a Self-propagating High Temperature Synthesis Combining a Rapid Cooling Technique.
Nanostructured Hypoeutectic Fe-B Alloy Prepared by a Self-propagating High Temperature Synthesis Combining a Rapid Cooling Technique.
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DOI：
10.1007/s11671-008-9195-4
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发表时间：
2008-11-06
影响因子：
--
通讯作者：
Liu W
中科院分区：
文献类型：
--
作者：
Fu L;Yang J;Bi Q;Liu W
采用自蔓延高温合成（SHS）结合快速冷却技术一步法成功合成了大块纳米结构Fe 94.3B5.7合金。该方法操作简便、成本低、可大规模加工块体纳米结构材料。凝固组织由相对粗大、均匀分布的枝晶和含有α-Fe（B）和t-Fe 2 B相的纳米共晶基体组成。细小的共晶组织被打乱，在共晶的α-Fe（B）相中有Fe 2 B析出。在Fe 94.3 B 5.7合金中，枝晶相为t-Fe 2 B而非α-Fe（B），这是由于深过冷时t-Fe 2 B的生长速度比α-Fe快。Fe_（94.3）B_（5.7）合金的矫顽力和饱和磁化强度分别为11 A/m和1.74T。Fe 94.3B 5.7合金在1430 MPa下屈服，在1710 MPa下断裂，并具有19.8%的塑性。
We have successfully synthesized bulk nanostructured Fe94.3B5.7 alloy using the one-step approach of a self-propagating high temperature synthesis (SHS) combining a rapid cooling technique. This method is convenient, low in cost, and capable of being scaled up for processing the bulk nanostructured materials. The solidification microstructure is composed of a relatively coarse, uniformly distributed dendriteto a nanostructured eutectic matrix with α-Fe(B) and t-Fe2B phases. The fine eutectic structure is disorganized, and the precipitation Fe2B is found in the α-Fe(B) phase of the eutectic. The dendrite phase has the t-Fe2B structure rather than α-Fe(B) in the Fe94.3B5.7 alloy, because the growth velocity of t-Fe2B is faster than that of the α-Fe with the deeply super-cooling degree. The coercivity (Hc) and saturation magnetization (Ms) values of the Fe94.3B5.7 alloy are 11 A/m and 1.74T, respectively. Moreover, the Fe94.3B5.7 alloy yields at 1430 MPa and fractures at 1710 MPa with a large ductility of 19.8% at compressive test.
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DOI：
10.1016/j.msea.2005.08.091
发表时间：
2005-11-25
影响因子：
6.4
作者：
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通讯作者：
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