Air oxidation of the bulk amorphous alloy Zr46.75Ti8.25Cu7.5Ni10Be27.5 studied by using a TGA

The oxidation in air of the bulk amorphous alloy Zr46.75Ti8.25Cu7.5Ni10Be27.5 in its amorphous state and the supercooled liquid state was studied in the temperature range of 588–633 K by using a thermogravimetric analyser (TGA). The oxidation kinetics of the alloy obeys the parabolic rate law during oxidation in its amorphous state as well as in the supercooled liquid state. The results were compared with those obtained in our previous study of the air oxidation of another well-known bulk alloy, Zr65Cu17.5Ni10Al7.5, in the temperature range of 591–684 K. The value of the parabolic rate constant (K) for the alloy Zr46.75Ti8.25Cu7.5Ni10Be27.5 (e.g. K=5.9× 10−9 g cm−2 s−1/2 at 588 K) is about two orders of magnitude less than its value for the other bulk alloy Zr65Cu17.5Ni10Al7.5 (K=6.8× 10−7 g cm−2 s−1/2 at 588 K), thus suggesting that the bulk amorphous alloy Zr46.75Ti8.25Cu7.5Ni10Be7.5 displays a better oxidation resistance in air than Zr65Cu17.5Ni10Al7.5.

[1]  Tao Zhang,et al.  Air Oxidation Kinetics Study of Zr58Nb3Cu16Ni13Al10 Bulk Metallic Glass , 2009 .

[2]  D. B. Lee,et al.  Oxidation of Zr65Al10Ni10Cu15 bulk metallic glass , 2008 .

[3]  D. B. Lee,et al.  Oxidation behavior of bulk amorphous Ni57Ti18Zr20Si3Sn2 coatings between 473 and 973 K in air , 2008 .

[4]  V. Zaporojtchenko,et al.  Study of air oxidation of amorphous Zr65Cu17.5Ni10Al7.5 by X-ray photoelectron spectroscopy (XPS) , 2007 .

[5]  K. Chan,et al.  Oxidation of Zr55Cu30Al10Ni5 bulk metallic glass in the glassy state and the supercooled liquid state , 2005 .

[6]  T. Nieh,et al.  Effect of Zr-content on the oxidation and phase transformation of Zr-base amorphous alloys in air , 2004 .

[7]  N. Wanderka,et al.  Crystallization behavior of low temperature pre-annealed Zr46.8Ti8.2Ni10Cu7.5Be27.5—bulk glass , 2004 .

[8]  F. Faupel,et al.  Air oxidation of Zr65Cu17.5Ni10Al7.5 in its amorphous and supercooled liquid states, studied by thermogravimetric analysis , 2003 .

[9]  T. Nieh,et al.  Oxidation behavior of a Zr–Cu–Al–Ni amorphous alloy in air at 300–425 °C , 2002 .

[10]  P. Fielitz,et al.  Bulk Amorphous, Nano-Crystalline and Nano-Quasicrystalline Alloys. IV. Relation Between Time and Temperature Dependence of Diffusion and the Structural State in ZrTiCuNiBe Bulk Glasses. , 2002 .

[11]  F. Faupel,et al.  Study of oxidation behaviour of Zr-based bulk amorphous alloy Zr65Cu17.5Ni10Al7.5 by thermogravimetric analyser , 2001 .

[12]  A. Rüdiger,et al.  Environmental properties of Zr-based metallic glasses and nanocrystalline alloys , 2001 .

[13]  F. Faupel,et al.  Oxide Formation on the Bulk Metallic Glass Zr 46.75 Ti 8.25 Cu 7.5 Ni 10 Be 27.5 , 1998 .

[14]  W. Johnson,et al.  Oxidation and crystallization of an amorphous Zr60Al15Ni25 alloy , 1996 .

[15]  William L. Johnson,et al.  Bulk metallic glasses — a new engineering material , 1996 .

[16]  K. Asami,et al.  High Temperature Oxidation Behavior of Amorphous Zr–Ni Alloys in Air , 1995 .

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

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

[19]  A. Inoue,et al.  Mg–Cu–Y Amorphous Alloys with High Mechanical Strengths Produced by a Metallic Mold Casting Method , 1991 .