Oxidation Behavior of Zr43Cu45Al12 Bulk Metallic Glass at 400-525 °C in Air Atmosphere

Abstract

The oxidation behavior of Zr 43 Cu 45 Al 12 bulk metallic glass was studied over the temperature range 400-525°C in air atmosphere. The oxidation kinetics of the material changes significantly, from the parabolic one in 400°C to logarithmic kinetics in T = 450°C and higher. The inversion of oxidation kinetics was observed. Composition of the scale varied over the examined temperature range, consisting mostly of monoclinic ZrO 2 , tetragonal ZrO 2 and CuO, with minor amounts of a-Al 2 O 3 within whole temperature range and Cu 2 O in temperatures 400 and 450°C. The a-Al 2 O 3 presence can be correlated with decrease of oxidation rate in the higher temperatures.

Effects of Oxygen Impurities on Glass-Formation Ability in Zr2Cu Alloy

“…Furthermore, in the case of systems with much higher O content, the MRO will fill up the entire supercell. The reported experimental results suggest that monoclinic ZrO 2 , tetragonal ZrO 2 , and even CuO will be formed.…”

On the competition between synchronous oxidation and preferential oxidation in Cu-Zr-Al metallic glasses

“…The GFA of the amorphous Cu-Zr-Al alloy system, as reflected by the temperature of J o u r n a l P r e -p r o o f supercooled liquid region ( xg T T T    ), from previous studies [13,49,51,53,[58][59][60][61] and the present work (see Table 1, c.f. Fig.…”

Mechanical properties and thermal stability of ZrCuAlx thin film metallic glasses: Experiments and first-principle calculations

“…4 reports oxidation phenomena with the formation of crystalline ZrO 2 and Al 2 O 3 followed by crystallization phase with the formation of ZrCuAl intermetallic compounds occurring for all the investigated ZrCuAl x compositions. The presence of oxides is likely due to residual O during XRD measurement, which reacts preferentially with Zr and Al due to their high O affinity [49,50]. As an example, in the case of ZrCuAl 6 (Fig.…”