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研究了Ce69.5-xCu18Al1 1Nb1.5Yx(x=0,1,2,3)块体非晶的非晶形成能力、力学性能和耐腐蚀性能。结果表明:添加Y元素能够有效提高Ce-Cu-Al-Nb合金的非晶形成能力。其中,Ce67.5Cu18Al1 1Nb1.5Y2样品具有最佳的非晶形成能力,过冷液相区ΔTx=97 K,玻璃化转变温度Tg=349 K。在298 K进行压缩时,所有样品都表现出脆性断裂行为,断口形貌为典型的叶脉状花样。在363 K进行压缩时,所有样品都表现出明显的宏观塑性变形行为,当x=0~2时,可以观察到应力过冲现象。Ce67.5Cu18Al1 1Nb1.5Y2样品在塑性变形时,其流变应力最低,应变平台区最宽,有利于塑性加工。同时发现,添加Y可以改善Ce-Cu-Al-Nb合金的耐腐蚀性能,其中Ce67.5Cu18Al1 1Nb1.5Y2样品的耐腐蚀性能最佳。
The amorphous formation, mechanical properties and corrosion resistance of Ce69.5-xCu18Al1 1Nb1.5Yx (x = 0,1,2,3) bulk were studied. The results show that adding Y can effectively improve the amorphous formation ability of Ce-Cu-Al-Nb alloy. Among them, Ce67.5Cu18Al1 1Nb1.5Y2 samples have the best amorphous formation ability, the supercooled liquid region ΔTx = 97 K, the glass transition temperature Tg = 349 K. When compressed at 298 K, all the samples showed brittle fracture behavior, and the morphology of the fracture was a typical vein pattern. At 363 K compression, all the samples showed obvious macroscopic plastic deformation behavior. When x = 0 ~ 2, the stress overshoot phenomenon can be observed. Ce67.5Cu18Al1 1Nb1.5Y2 samples in the plastic deformation, the lowest flow stress, strain the largest platform area, is conducive to plastic processing. At the same time, it is found that the addition of Y can improve the corrosion resistance of Ce-Cu-Al-Nb alloy, and the corrosion resistance of Ce67.5Cu18Al1 1Nb1.5Y2 sample is the best.