Transient Oxidation Behavior of Fe-5wt.%Al Alloy at 1073 K in Atmospheres Containing Both Oxygen and Water Vapor
Transient Oxidation Behavior of Fe-5wt.%Al Alloy at 1073 K in Atmospheres Containing Both Oxygen and Water Vapor
复制标题
瞬态%20氧化%20行为%20of%20Fe-5wt.%Al%20合金%20at%201073%20K%20in%20大气%20含%20%20氧气%20和%20水%20蒸气
DOI：
10.1023/a:1020106804999
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发表时间：
2002
影响因子：
2.2
通讯作者：
T. Narita
中科院分区：
文献类型：
--
作者：
S. Hayashi;T. Narita
研究了Fe-5 wt.%合金的瞬态氧化行为，研究了1073 K时铝合金的热稳定性。合金在两种气氛中氧化，其中气体组成从初始的N2-12.2H2O或O2-12.2H2O改变为N2-0.9O2-12.2H2O，反之亦然。当气体成分从N2-12.2H2O改变为N2-0.9O2-12.2H2O以及从N2-0.9O2-12.2H2O改变为N2-12.2H2O或O2-12.2H2O时，氧化动力学和氧化膜结构迅速改变。当气体组成从O2-12.2H2O改变为N2-0.9O2-12.2H2O时，氧化动力学在1.5 hsec延迟后改变。合金在快速氧化过程中，产生游离裂纹并扩展。这些解离裂隙的形成和消失受到氧含量的强烈影响。有人建议，氧化动力学的解离反应的影响，这是由跨尺度的氧活性梯度控制。
The transient oxidation behavior of Fe-5wt.%Al alloy was investigated at 1073 K. Alloys were oxidized in two atmospheres, where gas compositions were changed from an initial N2-12.2H2O or O2-12.2H2O to N2-0.9O2-12.2H2O and vice versa. When the gas composition was changed from N2-12.2H2O to N2-0.9O2-12.2H2O and also from N2-0.9O2-12.2H2O to N2-12.2H2O or O2-12.2H2O, the oxidation kinetics and scale structures rapidly changed. When the gas composition was changed from O2-12.2H2O to N2-0.9O2-12.2H2O, the oxidation kinetics changed after a 1.5-hsec delay. When the alloy was oxidized rapidly, dissociative fissures were generated and grew. The formation and extinction of these dissociative fissures was strongly influenced by the oxygen contents. It is suggested that the oxidation kinetic were affected by dissociation reactions and that this was controlled by the oxygen-activity gradient across the scale.