采用工业原料通过水冷铜模铸造法制备了直径为5mm的Fe69C7.0Si3.5B4.8P9.6Cr2.1Mo2.0Al2.0 (at.%) 块状非晶合金.利用DSC, DTA 和 XRD对该非晶合金的热稳定性及晶化行为进行了研究. 其玻璃转变温度Tg﹑过冷液相区△Tx (Tx-Tg)﹑约化玻璃转变温度Trg (Tg/Tl)﹑玻璃形成能力参数g (Tx/(Tg+Tl))分别为784K, 27K, 0.601和0.388. Fe69C7.0Si3.5B4.8P9.6Cr2.1Mo2.0Al2.0块状非晶的晶化过程分为两个阶段, 首先是a-Fe相的析出, 然后是Fe3C, Fe2P, FeB, Fe2B相的同时析出. 力学性能测试显示该合金具有异常高的断裂强度3870MPa﹑杨氏模量177GPa﹑弹性形变0.021﹑塑性形变0.0029.
A new cast Fe-based bulk metallic glass Fe69C7.0Si3.5B4.8P9.6Cr2.1Mo2.0Al2.0 (at%) with maximum thickness of 5mm in diameter was successfully prepared by copper mold casting technique using industrial raw materials. The thermal stability and crystallization behavior were investigated by differential scanning calorimetry (DSC), differential thermal analysis (DTA) and x-ray diffraction (XRD). The results showed that the glass transition temperature Tg, supercooled liquid region △Tx (△T x = T x -Tg), reduced glass transition temperature Trg (Tg/Tl) and glass-forming ability parameter g (Tx/(Tg+Tl)) were measured to be 784K, 27K, 0.601, 0.388, respectively. The double-stage crystallization process of Fe69C7.0Si3.5B4.8P9.6Cr2.1Mo2.0Al2.0 amorphous ribbons is due to the first precipitation of single a-Fe phase followed by the precipitation of Fe3C, Fe2P, FeB, Fe2B phases simultaneously. The bulk glassy alloy exhibits very high fracture strength of about 3870MPa, Young’s modulus (E) of 177GPa, elastic strain(εe) of 0.021 and plastic strain (εp) of 0.0029.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%