Exceptionally high glass-forming ability of an FeCoCrMoCBY alloy
Exceptionally high glass-forming ability of an FeCoCrMoCBY alloy
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DOI：
10.1063/1.1897426
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发表时间：
2005-04
影响因子：
4
通讯作者：
Jun Shen;Qingjun Chen;Jianfei Sun;H. Fan;G. Wang
中科院分区：
文献类型：
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作者：
Jun Shen;Qingjun Chen;Jianfei Sun;H. Fan;G. Wang
已有大量文献证明，通过常规冶金途径可获得的铸态玻璃样品的最大厚度是衡量块体金属玻璃（BMG）的玻璃形成能力（GFA）的决定性标准。在这里，我们报告的FeCoCrMoCBY合金，可以制造的玻璃棒的形式，最大样品厚度至少为16毫米的异常高的GFA。结果表明，在已有的Fe基BMG合金中，用适量的Co取代Fe，不仅在热力学上，而且在动力学上都有利于合金的玻璃形成。这种新型铁基BMG合金还具有3500 MPa的高断裂强度和1253 kgmm − 2的维氏硬度。已有大量文献证明，通过常规冶金方法可获得的铸态玻璃样品的最大厚度是衡量大块金属玻璃（BMG）的玻璃形成能力（GFA）的决定性标准。在这里，我们报告的FeCoCrMoCBY合金，可以制造的玻璃棒的形式，最大样品厚度至少为16毫米的异常高的GFA。结果表明，在已有的Fe基BMG合金中，用适量的Co取代Fe，不仅在热力学上，而且在动力学上都有利于合金的玻璃形成。新型铁基BMG合金还具有3500 MPa的高断裂强度和1253kgmm−2的维氏硬度。
It has been well documented that the maximum thickness of as-cast glassy samples attainable through conventional metallurgical routes is the decisive criteria for measuring the glass-forming ability (GFA) of bulk metallic glasses (BMGs). Here we report the exceptionally high GFA of an FeCoCrMoCBY alloy which can be fabricated in the form of glassy rods with a maximum sample thickness of at least 16mm. It is demonstrated that, by substituting Fe with a proper amount of Co in a previously reported Fe-based BMG alloy, the glass formation of the resultant new alloy can be extensively favored both thermodynamically and kinetically. The new ferrous BMG alloy also exhibits a high fracture strength of 3500MPa and Vickers hardness of 1253kgmm−2.It has been well documented that the maximum thickness of as-cast glassy samples attainable through conventional metallurgical routes is the decisive criteria for measuring the glass-forming ability (GFA) of bulk metallic glasses (BMGs). Here we report the exceptionally high GFA of an FeCoCrMoCBY alloy which can be fabricated in the form of glassy rods with a maximum sample thickness of at least 16mm. It is demonstrated that, by substituting Fe with a proper amount of Co in a previously reported Fe-based BMG alloy, the glass formation of the resultant new alloy can be extensively favored both thermodynamically and kinetically. The new ferrous BMG alloy also exhibits a high fracture strength of 3500MPa and Vickers hardness of 1253kgmm−2.