3种不同Cr含量Co-20Re-Cr合金在1000和1100 ℃的高温氧化行为

王玲,向军淮,张洪华,覃宋林

High Temperature Oxidation Behavior of Three Co-20Re-xCr Alloys in 3.04×10-5 Pa Oxygen at 1000 and 1100 ℃

Ling WANG,Junhuai XIANG,Honghua ZHANG,Songlin QIN

表2 Co-20Re-xCr (x=20，25，30) 合金在1000和1100 ℃恒温氧化24 h的近似抛物线速率常数

Table 2 Approximate parabolic rate constants Kp of Co-20Re-xCr (x=20, 25, 30) alloys during oxidation at 1000 and 1100 oC for 24 h (g2·cm-4·s-1)

Alloy 1000 ℃ 1100 ℃ Co-20Re-20Cr 6.83×10-9 (0~1440 min) 1.57×10-8 (0~1440 min) Co-20Re-25Cr 3.73×10-9 (0~1440 min) 7.37×10-9 (0~1440 min) Co-20Re-30Cr 1.01×10-9 (0~36 min) 2.29×10-11 (0~150 min) 1.92×10-10 (36~500 min) 4.24×10-12 (150~500 min) 2.43×10-10 (500~1440 min) 2.34×10-10 (500~1440 min)