(1. 河南理工大学 材料科学与工程学院，焦作 454000；
2. 燕山大学 亚稳材料制备技术与科学国家重点实验室，秦皇岛 066004；
3. 河南理工大学 物理化学学院，焦作 454000)
摘 要: 利用电弧炉制备一系列(Zr51.6Cu48.4)100−xAlx(x=6.0~10.0, 摩尔分数，%)大块非晶合金，利用示差扫描量热仪、X射线衍射仪和金相显微镜研究Al的含量对其非晶形成能力的影响。结果表明：当铝的含量为9.0%时，合金具有最优的非晶形成能力。适量铝的加入不仅能够抑制初生相CuZr的析出，而且还能有效地抑制其长大。临界冷却速率的经验公式计算结果显示该合金的临界冷却速率为10 K/s，室温压缩力学性能显示其断裂强度为1.9 GPa，且有0.5%的塑性变形，断裂方式为韧性剪切断裂。
关键字: 大块非晶合金；非晶形成能力；临界冷却速率；力学性能
Zr47Cu44Al9 bulk metallic glass
（1. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University,
Qinhuangdao 066004, China;
3. School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China）
Abstract:Bulk metallic glasses (BMG) (Zr51.6Cu48.4)100−xAlx(x=6−10, molar fraction, %) were prepared by copper mould casting. The effect of Al content on the glass-forming ability (GFA) of ZrCu based metallic glass alloys was investigated by differential scanning calorimetry, X-ray diffractometry, and optical microscopy. The results show that when the Al content is 9.0%, the alloy has the optimal GFA. Proper Al additions can suppress the precipitation and the growth of the primary CuZr phase. The critical cooling rate of the Zr47Cu44Al9 alloy is about 10 K/s. The compression strength is about 1.9 GPa and the elongation is about 0.5%. The surface morphology of fracture shows a clear vein pattern.
Key words: bulk amorphous alloy; glass forming ability; critical cooling rate; mechanical properties
