Oxidation behavior of the (Cu78Y22)98Al2 bulk metallic glass containing Cu5Y-particle composite 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 scales formed on the glassy alloy consisted mainly of boron oxide (B 2 responsible for the reduced oxidation rates of the glassy alloy as compared to those of crystalline counterpart. 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.…”

“…In addition, the oxidation of the (Cu 78 Y 22 ) 98 Al 2 amorphous composite containing Cu 5 Y at 400-600 C was also examined [79]. It is found that the Cu 5 Y-bearing composite has lower oxidation rates than those of the (Cu 78 Y 22 ) 98 Al 2 amorphous and pure Cu.…”

Pd/Ce0.9Cu0.1O1.9-Y2O3 catalysts for catalytic combustion of toluene and ethyl acetate

“…The transition of the finely dispersed CuO species to the bulk CuO particles is due to the sintering of CuO particles during the high temperature calcination [21][22][23][24].…”