典型文献
Effect of Ce addition on hot corrosion behaviours of a cast y'-strengthened Co-Al-W-Mo-Ta-B alloy at 800℃
文献摘要：
Hot corrosion behaviours of a novel Co-9Al-4.5W-4.5Mo-2Ta-0.02B alloy doped with 0.01,0.05,0.1 and 0.2 at％Ce exposed at 800℃in a solution of 75％Na2SO4/25％NaCl were investigated.The alloys comprised a coherentγ-Coss/γ'-Co3(Al,W)microstructure(0.01Ce and 0.05Ce alloys)and K-Co3(W,Mo)precipitates(0.1Ce and 0.2Ce alloys)at grain boundaries.Hot corrosion kinetics curves demonstrated the parabolic time dependency profile with two stages:the first parabolic stage is within the beginning～50 h corrosion and follows by the second parabolic stage.With an increasing nominal Ce content the weight gain of the alloy significantly decreased from approximately 70.1 mg cm-2(0.01Ce)to 40.8 mg cm-2(0.2Ce)when exposed for 100 h.A two-layer corrosion scale formed,and the scale was composed of an outer layer of Co3O4 oxide with spinel compounds of CoAl2O4,CoWO4and CoSO4,and an inner y/needle-like Co3W/sulphide layer adhered to the substrate.Heavy spallation of the corrosion scale occurred in the 0.01Ce～0.1Ce alloys,however,spallation was slight in the 0.2Ce alloy.The excellent corrosion resistance of the 0.2Ce alloy could be attributed mainly to the formation of continuous Al2O3 lines in the corrosion scale,as well as the prolongation of the incubation period of the corrosion product spallation.
文献关键词：
中图分类号：
作者姓名：
Qi Guan;Fei Zhong;Jiangbo Sha
作者机构：
School of Materials Science and Engineering,Beijing University of Aeronautics and Astronautics,Key Laboratory of Aerospace Materials and Performance(Ministry of Education),Beijing,100191,China;College of Chemistry and Materials Science,Hubei Engineering University Xiaogan,432000,China
文献出处：
引用格式：
[1]Qi Guan;Fei Zhong;Jiangbo Sha-.Effect of Ce addition on hot corrosion behaviours of a cast y'-strengthened Co-Al-W-Mo-Ta-B alloy at 800℃)[J].自然科学进展·国际材料（英文）,2022(04):463-471
A类：
02B,Coss,01Ce,1Ce,CoWO4and,CoSO4
B类：
Effect,addition,hot,corrosion,behaviours,cast,strengthened,Hot,novel,9Al,5W,5Mo,2Ta,doped,exposed,solution,Na2SO4,NaCl,were,investigated,alloys,comprised,coherent,microstructure,05Ce,precipitates,2Ce,grain,boundaries,kinetics,curves,demonstrated,parabolic,dependency,profile,two,stages,first,within,beginning,follows,by,second,With,increasing,nominal,content,weight,gain,significantly,decreased,from,approximately,when,layer,scale,formed,was,composed,outer,Co3O4,oxide,spinel,compounds,CoAl2O4,inner,needle,like,Co3W,sulphide,adhered,substrate,Heavy,spallation,occurred,however,slight,excellent,resistance,could,attributed,mainly,formation,continuous,Al2O3,lines,well,prolongation,incubation,period,product
AB值：
0.491983
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
