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利用铜模吸铸法制备了直径1.0mm和 2 .0mm的Fe74 Al4 Sn2 P1 0 Si4 B4 C2 块体非晶合金和直径 2 .0mm的Fe74 Al4 Sn2 P1 0 Si4 B4 C2 块体纳米晶合金圆棒。利用X射线衍射、差示扫描量热仪 (DSC)和差热分析仪 (DTA)对Fe74 Al4 Sn2 P1 0 Si4 B4 C2 块体非晶合金的结构和热性质进行了测定。该非晶合金的超冷液相区ΔTx 为 16 .7K ,约化玻璃转变温度Tg Tm 和Tg Tl 分别为 0 .6 0和 0 .5 7。Fe74 Al4 Sn2 P1 0 Si4 B4 C2 合金接近共晶成分 ,在 10K min的冷却速率下其过冷度可达 86 .7K。利用透射电子显微镜 (TEM)观察了制备态的Fe74 Al4 Sn2 P1 0 Si4 B4 C2 纳米晶合金圆棒的结构 ,为非晶基体上均匀分布的尺寸 10～ 2 0nm的α Fe晶粒。Fe74 Al4 Sn2 P1 0 Si4 B4 C2 合金能达到较大的过冷度 ,具有较高的约化玻璃转变温度 (接近共晶合金成分 )和过冷合金熔体的二步相析出有利于块体非晶合金和块体纳米晶合金的形成。铜模吸铸法既可制备块体非晶合金 ,也可制备块体纳米晶合金 ,是一种很有吸引力的制备块体非晶合金和块体纳米晶合金的方法 ,并进一步证实利用快速凝固法可以直接制备块体纳米晶合金。
The Fe74Al4Sn2P10Si4B4 C2 bulk amorphous alloy with diameters of1.0mm and2.0mm and the Fe74Al4Sn2P10Si4B4 C2 bulk nanocrystalline alloy round with a diameter of0.2mm were prepared by copper mold suction casting Baton. The structure and thermal properties of Fe74Al4Sn2P10Si4B4 C2 bulk amorphous alloys were investigated by X-ray diffraction, differential scanning calorimetry (DSC) and differential thermal analyzer (DTA). The amorphous alloy has a supercooled liquid region ΔTx of 16.7 K and a reduced glass transition temperature Tg Tm and Tg Tl of 0.060 and 0.57, respectively. Fe74 Al4 Sn2 P1 0 Si4 B4 C2 alloy close to the eutectic composition, at a cooling rate of 10K min its subcooling up to 86 .7K. The structure of Fe74Al4Sn2P10Si4B4 C2 nanocrystalline alloy rods was observed by transmission electron microscopy (TEM), and the αFe grains were uniformly distributed on the amorphous matrix with the size of 10 ~ 20 nm. Fe74 Al4 Sn2 P1 0 Si4 B4 C2 alloy can reach a greater degree of undercooling, with a higher glass transition temperature (close to the eutectic alloy composition) and two-phase precipitation of supercooled alloy melt is conducive to bulk non Crystalline and Bulk Nanocrystalline Alloy Formation. Copper mold suction casting method can not only prepare bulk amorphous alloy, but also can prepare bulk nanocrystalline alloy, which is a very attractive method for preparing bulk amorphous alloy and bulk nanocrystalline alloy, and further confirm the use of Rapid solidification method can be prepared directly bulk nanocrystalline alloy.