The mechanism study on annealing embrittlement of Al_(88)Ce_2Ni_9Fe_1 metallic glass

• 作 者: 孟昭富 王群 龙厚文
• 机 构: Materials Science Institute, Jilin University, Changchun 130023, Chinarrrrrrrrn,Materials S
• 出 处: Science in China(Series E:Technological Sciences)
• 发表日期: 1997年02期
• 关键词: annealing SAXS metallic crystalline brittle annealed transformed ductile amorpho

The mechanism of annealing embrittlement of Al88Ce2Ni9Fe1 metallic glass is studied by using SAXS. For this alloy the activation energy for embrittlement, Eb=(160±10) kJ·mol-1 is obtained It approaches the value of the activation energy for crystallization, Ec= (170± 10} kJ·mol-1 . The significant change in SAXS intensity is observed as the sample transformed from the ductile to the brittle state. About 0. 1 volume fraction of Al crystalline particle and 60 m2/cm3 of specific inner surface between crystalline and amorphous phase appear as the sam ple transformed from the ductile to the brittle state. The annealing embrittlement is caused by crystallization of this alloy.

The mechanism of annealing embrittlement of Al88Ce2Ni9Fe1 metallic glass is studied by using SAXS. For this alloy the activation energy for embrittlement, Eb = (160 ± 10) kJ · mol-1 is obtained the values ​​of the activation energy for crystallization, Ec = (170 ± 10) kJ · mol-1. The significant change in SAXS intensity was observed as the sample transformed from the ductile to the brittle state. About 0. 1 volume fraction of Al crystalline particle and 60 m2 / cm3 of specific inner surface between crystalline and amorphous phase appear as the sam ple transformed from the ductile to the brittle state. The annealing embrittlement is caused by crystallization of this alloy.