三元Co-Ni-Al合金在800~1000 ℃纯氧中的氧化行为研究

任延杰, 吕云蕾, 戴汀, 郭晓慧, 陈荐, 周立波, 邱玮, 牛焱

Oxidation Behavior of Ternary Alloys Co-20Ni-3Al and Co-20Ni-5Al in 105 Pa O2 Atmosphere at 800-1000 ℃

REN Yanjie, LV Yunlei, DAI Ting, GUO Xiaohui, CHEN Jian, ZHOU Libo, QIU Wei, NIU Yan

表2 两种Co-20Ni-Al合金在800,900和1000 ℃下105 Pa O2中氧化20 h动力学曲线的抛物线速率常数

Table 2 Fitting parabolic rate constants of the oxidation kinetics of Co-20Ni-3Al and Co-20Ni-5Al alloys in 105 Pa O2 at 800, 900 and 1000 ℃ for 20 h (g2·cm-4·s-1)

Temperature / ℃ Alloy Parabolic stages Ⅰ Ⅱ 800 Co-20Ni-3Al 2.18×10-10 (0.25-12.5 h) 4.92×10-10 (12.5-20 h) Co-20Ni-5Al 1.57×10-10 (0.25-20 h) 900 Co-20Ni-3Al 4.28×10-9 (0.25-3 h) 4.03×10-8 (3-20 h) Co-20Ni-5Al 1.97×10-9 (0.25-20 h) 1000 Co-20Ni-3Al 3.85×10-7 (0.6-4.5 h) 1.77×10-8 (4.5-20 h) Co-20Ni-5Al 1.31×10-8 (0-20 h)