LI Tiefan
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LI Meishuan Corrosion Science Laboratory
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Institute of Corrosion and Protection of Metals
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Academia Sinica Shenyang.China
金属学报(英文版)
Au investigation was carried ont of the effect of Y addition upon the internal stress of Al_2O_3 scale formed during oxidation of sputtering coating on Co-30Cr-6Al alloy and the growth stress of oxidized film on Fe-23Cr-5Al alloy heating up to 900℃ in air,using a specially designed deflection method from thin strip specimen with coat- ings,ion-implanted Y on one side and oxidized onto both sides.Results indicate that Y may decrease the internal stress of oxide scale on 2×10~(17) Y~+/cm~2 implanted Co- 30Cr-6Al coating,and increase one on 2×10~(16) Y~+/cm~2 implanted Fe-23Cr-5Al alloy. This seems due to whether or not Y promotes the plastic deformation of oxide scale.In addition,at initial oxidation stage,the change of growth stress of oxide scale formed on Y-implanted Co-30Cr-6Al coating may be related to the influence of Y on oxidation process of the coating.
关键词:
growth stress
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李美栓
,
钱余海
,
辛丽
中国腐蚀与防护学报
采用一种测定氧化膜生长应力的双面氧化弯曲方法，测量了Fe-23Cr-5Al(Fe-22.6Cr-4.42Al-0.21Ti,wt%)合金在1000℃空气中氧化形成的Al2O3膜的平均生长应力，研究了氧化膜应力释放机制。Al2O3膜的平均生长应力随膜厚增大而减小，其大小从-1GPa数量级变化到-100MPa数量级。基体合金和Al2O3膜在1000℃时均发生蠕变。合金氧化一定时间后于真空保温退火，发现0。0.039μm厚的氧化膜应力下降速率比0.30μm厚的氧化膜快6.9-18.4倍.
关键词:
生长应力
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deflection test
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greep analysis
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oxidation
