【摘要】 采用悬浮熔炼-铜模吸铸法制备了Cu基块状金属玻璃,对直径5.0 mm的Cu50Zr42Al8三元合金圆棒利用X射线衍射(XRD)和差示扫描量热法(DSC)对合金的结构和热稳定性进行了测定.实验结果表明,该合金圆棒的组织为明显的非晶相,玻璃转变温度Tg、晶化温度Tx的值分别为730 K与778 K,过冷液相区宽度ΔT值为48 K,临界冷却速度Rc为25.5 K/s,表明该合金具有较强的玻璃形成能力,悬浮熔炼-铜模吸铸法是一种适合于制备块状金属玻璃的方法.更多还原

【Abstract】 The Cu-based bulk metallic glass was prepared by means suspend melting-copper mold suction casting,and the structure and thermal properties of the ternary alloy Cu₅₀Zr₄₂Al₈ rod of 5.0 mm in diameter was investigated by X-ray diffraction（XRD） and differential scanning calorimetry（DSC）,respectively.The results showed that the structure of the rod was composed of amorphous phase,the glass transition temperature T_g and crystallization temperature T_x of the bulk metallic glass Cu₅₀Zr₄₂Al₈ was 730 K and 778 K,respectively,the temperature interval of the supercooled liquid region ΔT was 48 K,and the critical cooling rate R_c was 25.5 K/s,meaning that the alloy had higher glass-forming ability and the method of suspend melting-copper mold suction casting is a suitable method for preparing bulk metallic glass.更多还原