研究了Ce69.5-xCu18Al11Nb1.5Yx(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,Ce675Cu18Al11Nb1.5Y2样品具有最佳的非晶形成能力,过冷液相区△Tx=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.Ce67.5Cu18Al11Nb1.5Y2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Ce67.5 Cu18Al11Nb1.5Y2样品的耐腐蚀性能最佳.
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