Crystallization kinetics of an amorphous Zr70Cu20Ni10 alloy

Abstract Differential scanning calorimetry and transmission electron microscopy (TEM) were employed to investigate the crystallization kinetics of an amorphous Zr70Cu20Ni10 alloy. It has been found that the crystallization process is mainly controlled by three-dimensional nucleation and growth with an increasing nucleation rate. The activation energy for crystallization is approximately 388 kJ/mol. TEM observations confirmed that the primary precipitation phase during the isothermal crystallization process is the Zr2Ni phase, which can be partly attributed to the stronger binding nature between Zr and Ni atoms than that between Zr and Cu atoms.

[1]  Shi Zhi-qiang,et al.  Short-Range and Medium-Range Order in Liquid Cu-Ni Alloy , 2002 .

[2]  A. Takeuchi,et al.  Calculations of amorphous-forming composition range for ternary alloy systems and analyses of stabilization of amorphous phase and amorphous-forming ability , 2001 .

[3]  Akira Takeuchi,et al.  Calculations of mixing enthalpy and mismatch entropy for ternary amorphous alloys : Special issue on bulk amorphous, nano-crystalline and nano-quasicrystalline alloys , 2000 .

[4]  Jian Xu,et al.  The Effect of Nitride Addition on the Thermal Stability of Mechanically Alloyed Amorphous Zr65Al7.5Cu17.5Ni10 Alloy , 2000 .

[5]  F. Sommer,et al.  Enthalpy of mixing of liquid Ni-Zr and Cu-Ni-Zr alloys , 2000 .

[6]  A. Inoue.  Stabilization of metallic supercooled liquid and bulk amorphous alloys , 2000 .

[7]  J. Eckert,et al.  High-strength materials produced by precipitation of icosahedral quasicrystals in bulk Zr–Ti–Cu–Ni–Al amorphous alloys , 1999 .

[8]  Z. Hu,et al.  Crystallization of amorphous Zr65Cu27Al8 alloy with wide supercooled liquid region , 1998 .

[9]  K. Zhang,et al.  Nanocrystallization of amorphous Fe33Zr67 alloy , 1996 .

[10]  W. Johnson,et al.  A highly processable metallic glass: Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 , 1993 .

[11]  A. Inoue,et al.  Crystallization on supercooled liquid in metallic Zr‐Cu‐Al glasses , 1993 .

[12]  A. Inoue,et al.  Amorphous Zr–Al–TM (TM=Co, Ni, Cu) Alloys with Significant Supercooled Liquid Region of Over 100 K , 1991 .

[13]  Maret,et al.  Structure of liquid Al80Ni20 alloy. , 1990, Physical review. B, Condensed matter.

[14]  A. Inoue,et al.  Zr–Al–Ni Amorphous Alloys with High Glass Transition Temperature and Significant Supercooled Liquid Region , 1990 .

[15]  A. Inoue,et al.  An Amorphous La 55 Al 25 Ni 20 Alloy Prepared by Water Quenching , 1989 .

[16]  W. Johnson,et al.  Partial structure factors and chemical short-range order in Ni33Y67 and Cu33Y67 metallic glasses , 1987 .

[17]  J. Strom-Olsen,et al.  Crystallization characteristics of Cu‐Zr metallic glasses from Cu70Zr30 to Cu25Zr75 , 1982 .