An oxidation resistance study has been made on Nb-Cr-V-W-Ta high entropy alloy in a range of temperature from 600 to 1400℃in air.Static oxidation study has been performed for either(a)12 or 24 h of heating time or(b)...An oxidation resistance study has been made on Nb-Cr-V-W-Ta high entropy alloy in a range of temperature from 600 to 1400℃in air.Static oxidation study has been performed for either(a)12 or 24 h of heating time or(b)3 or 10℃/min heating rates to the desired oxidation temperature.Cyclic oxidation study conducted for three and a half days has been conducted at 600,700,and 800℃using 12 h of heating cycles.The alloy can withstand the cyclic oxidation process with only a reasonable loss of alloy.The identification of oxides indicates crystals of W and Ta oxides in cylindrical form while Nb and Cr oxides show a nodular or granular morphology at both 1000 and 1200℃while and additional of oxide of V in whisker forms at 1200℃.展开更多
基金support from the National Science Foundation with NSF-PREM grant#DMR-1827745.
文摘An oxidation resistance study has been made on Nb-Cr-V-W-Ta high entropy alloy in a range of temperature from 600 to 1400℃in air.Static oxidation study has been performed for either(a)12 or 24 h of heating time or(b)3 or 10℃/min heating rates to the desired oxidation temperature.Cyclic oxidation study conducted for three and a half days has been conducted at 600,700,and 800℃using 12 h of heating cycles.The alloy can withstand the cyclic oxidation process with only a reasonable loss of alloy.The identification of oxides indicates crystals of W and Ta oxides in cylindrical form while Nb and Cr oxides show a nodular or granular morphology at both 1000 and 1200℃while and additional of oxide of V in whisker forms at 1200℃.
