典型文献
Isothermal oxidation behavior of Nb-bearing austenitic cast steels at 950℃
文献摘要：
The oxidation behaviors of three austenitic cast steels with different morphologies of primary carbides at 950℃in air were investig-ated using scanning electron microscopy, energy dispersive spectroscopy, and focused ion beam/transmission electron microscopy. Their oxid-ation kinetics followed a logarithmic law, and the oxidation rate can be significantly decreased as long as a continuous silica layer formed at the scale/substrate interface. When the local Si concentration was inadequate, internal oxidation occurred beneath the oxide scale. The spallation of oxides during cooling can be inhibited with the formation of internal oxidation, owing to the reduced mismatch stress between the oxide scale and the substrate. The "Chinese-script" primary Nb(C,N) was superior to the dispersed primary Nb(C,N) in suppressing the oxidation penetra-tion in the interdendritic region by supplying a high density of quick-diffusion Cr channels. In addition, the innermost and outermost oxidation layers were enriched with Cr, whereas the Cr evaporation in the outermost layer was significant when the water vapor concentration in the en-vironment was high enough. These findings further the understanding regarding the oxidation behavior of austenitic cast steels and will pro-mote the alloy development for exhaust components.
文献关键词：
中图分类号：
作者姓名：
Hailong Zhao;Longfei Li;Qiang Feng
作者机构：
Beijing Advanced Innovation Center for Materials Genome Engineering,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China
文献出处：
引用格式：
[1]Hailong Zhao;Longfei Li;Qiang Feng-.Isothermal oxidation behavior of Nb-bearing austenitic cast steels at 950℃)[J].矿物冶金与材料学报,2022(04):814-824
A类：
oxid,innermost
B类：
Isothermal,oxidation,Nb,bearing,austenitic,cast,steels,behaviors,three,different,morphologies,primary,carbides,air,were,investig,ated,using,scanning,electron,microscopy,energy,dispersive,spectroscopy,focused,beam,transmission,Their,kinetics,followed,logarithmic,law,significantly,decreased,long,continuous,silica,formed,scale,substrate,interface,When,local,Si,concentration,was,inadequate,internal,occurred,beneath,spallation,oxides,during,cooling,inhibited,formation,owing,reduced,mismatch,stress,between,Chinese,script,superior,dispersed,suppressing,penetra,interdendritic,region,by,supplying,high,density,quick,diffusion,channels,In,addition,outermost,layers,enriched,whereas,evaporation,when,water,vironment,enough,These,findings,further,understanding,regarding,will,pro,mote,alloy,development,exhaust,components
AB值：
0.578804
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