An intermediate fcc Zr state observed in the Cu-Zr-Ni system upon ion beam mixing

作者：Wang, Q.; Ding, N.; Cui, Y. Y.; Dai, Y.; Liu, B. X.^*

来源：Materials Letters, 2012, 89: 90-92.

DOI：10.1016/j.matlet.2012.08.073

• Fcc Zr
• Non-equilibrium phase
• Ion beam mixing
• First-principle calculation

A unique face-centered-cubic (fcc) Zr-based solid solution was obtained in the Cu10Zr76Ni14 multi-layered films upon 200 keV xenon ion beam mixing, accompanied by a novel phase transition sequence of Cu + Zr + Ni -> dual-FCC -> FCC -> Amorphous while varying the irradiation dose. The energetic stability sequence, elastic stability and phonon behaviors derived from first-principle calculations jointly evidenced the metastability of fcc Zr from different perspectives. The experimental observations and theoretical calculations together justify the existence of an intermediate fcc Zr state under non-equilibrium conditions. Possible formation mechanisms for the metastable crystalline phase were also discussed in terms of the atomic collision theory.

• 出版日期2012-12-15
• 单位清华大学