Oxidation behavior of an Zr53Ni23.5Al23.5 bulk metallic glass at 400–600°C

Recent progress in metallic glasses in Taiwan

“…The oxidation behaviors have been examined in the Fe, Ni, Zr and Mg based BMGs in Taiwan [75][76][77][78][79][80][81][82]. For the Fe based alloys, the Fe 72 B 22 Y 6 BMG and its crystalline counterpart were studied over the temperature range of 600-700 C in dry air [75].…”

“…The high-temperature oxidation behaviors of the Zr and Cu based BMGs in dry air or oxygen environment have been systematically examined by Kai and his group [76][77][78][79][80][81][82], including Zr 53 Ni 23.5 Al 23.5 at 400-600 C [76], Cu 60 Hf 25 Ti 15 at 375-520 C [77], Cu 60 Zr 30 Ti 10 and Cu 60 Zr 20 Ti 10 Hf 10 at 350-500 C [78], (Cu 78 Y 22 ) 98 Al 2 amorphous composite at 400-600 C [79] and other systems [80][81][82]. For the Zr 53 Ni 23.5 Al 23.5 system at 400-600 C [76], the oxidation kinetics of the alloy follow the single-or two-stage parabolic rate law at T 500 C, but could be fitted by a three-stage parabolic law at 550-600 C. They found the amounts of Al 2 O 3 and monoclinic-ZrO 2 in the scales increase with the oxidation temperature. Based on the crystallographic and microstructural characterization results, they suggest more complicated oxidation kinetics at the temperature near T g (such as 500 C) and above; this might have resulted from the fact that crystallization of oxidation takes place simultaneously.…”

Metallic glass/light alloy (MEGA) multimaterials elaborated by co-pressing at high temperature

“…These products were preferentially attributed to the oxidation of the glass. The oxidation of various Zr-based BMGs has been quite extensively investigated in the recent past [13][14][15]. In particular, it was shown that in the case of a ZrAlCuNi metallic glass, the oxidation rate significantly increased between 623 K and 673 K and the main oxide formed was ZrO 2 which is generally considered as a non-protective oxide layer [15].…”

Thermal oxidation effect on corrosion behavior of Zr46Cu37.6Ag8.4Al8 bulk metallic glass

“…Various corrosion and oxidation studies on BMG nowadays have been conducted [3e14]. The oxidation studies on BMG reported mainly focused on oxidation kinetics [3], crystallization [4] and phase transformation behavior [5,6], while the corrosion study on BMG mainly conducted on trace elements effects [7], passive film property [8] and corrosion mechanism [9]. The corrosion studies found that Zr-based BMG exhibited good passivity in pure acidic and even in solutions with low concentration chloridecontaining [8,10].…”