摘要
利用双面氧化弯曲方法原位测量了Fe－23Cr－5Al合全空气中氧化形成的Al2O3膜平均生长应力Al2O3膜内存在压应力，900℃下氧化20h，膜内应力从3．5降低到2GPa；1000℃下氧化10h，膜内应力从0．8降低到0．4GPa．合金表面离子注入1×1017Ce+／cm2，增大了Al2O3膜的生长应力，其原因是添加稀土促进膜的横向生长，离子注入Ce同时增大了合金的氧化速率，促进了Al2O3膜的起皱，膜发生起皱后，其实际长度比平整的膜要大，由基体合金蠕变而引起的膜内应力释放也较少，尽管膜隆起部分与基材剥离，但膜整本与合金仍保持好的粘附性。
The growth stresses in alumina scales formed on Fe-23Cr-5Al-0.21Ti alloy and theinfluence of Ce implantation have been investigated by using a modified deflection technique. The averagegrowth stress in alumina scale on Fe-Cr-Al alloy is in the range of -3.5 -2 GPa during the oxidationat 900℃ for 20 h. and of -0.8 -0.4 GPa at 1000℃ for 10 h. The implautation of 1×1017 Ce+/cm2into Fe-23Cr-5Al-0.21Ti alloy increases the growth stress in Al2O3 scales, meanwhile, enhances the massgain of the alloy, and promotes the formation of convoluted scales. During annealing at 1000℃ in thevacuum, less growth stress was relaxed due to RE addition. Ce implantation may improve the spallationresistance of the scales during cooling after the isothermal oxidation.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第9期975-980,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金!59701010
大连三束材料改性国家重点`实验室资助
关键词
生长应力
高温氧化
离子注入
合金钢
stress, oxide scale, reactive element effect, oxidation
