典型文献
Medium-entropy(Me,Ti)0.1(Zr,Hf,Ce)0.9O2(Me=Y and Ta):Promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking
文献摘要：
With continuous enhancement of gas-turbine inlet temperature and rapid increase of radiant heat trans-fer,thermal barrier coating(TBC)materials with a combination of low thermal conductivity and good high-temperature thermal radiation shielding performance play vital roles in ensuring the durability of metallic blades.However,yttria-stabilized zirconia(YSZ),as the state-of-the-art TBC and current industry standard,is unable to meet such demands since it is almost translucent to high-temperature thermal ra-diation.Besides,poor corrosion resistance of YSZ to molten calcia-magnesia-alumina-silicates(CMAS)also impedes its application in sand,dust,or volcanic ash laden environments.In order to improve the high-temperature thermal radiation shielding performance and CMAS resistance of YSZ and further reduce its thermal conductivity,two medium-entropy(ME)oxide ceramics,ME(Y,Ti)0.1(Zr,Hf,Ce)0.9O2 and ME(Ta,Ti)0.1(Zr,Hf,Ce)0.9O2,were designed and prepared by pressureless sintering of binary powder com-pacts in this work.ME(Y,Ti)0.1(Zr,Hf,Ce)0.9O2 presents cubic structure but a trace amount of secondary phase,while ME(Ta,Ti)0.1(Zr,Hf,Ce)0.9O2 displays a combination of tetragonal phase(81.6 wt.％)and cubic phase(18.4 wt.％).Both ME(Y,Ti)0.1(Zr,Hf,Ce)0.9O2 and ME(Ta,Ti)0.1(Zr,Hf,Ce)0.9O2 possess bet-ter high-temperature thermal radiation shielding performance than YSZ.Especially,the high-temperature thermal radiation shielding performance of ME(Ta,Ti)0.1(Zr,Hf,Ce)0.9O2 is superior to that of ME(Y,Ti)0.1(Zr,Hf,Ce)0.9O2 due to its narrower band gap and correspondingly higher infrared absorbance(above 0.7)at the waveband of 1 to 5 μm.The two ME oxides also display significantly lower thermal conductivity than YSZ and close thermal expansion coefficients(TECs)to YSZ and Ni-based superalloys.In addition,the two ME oxides possess excellent CMAS resistance.After attack by molten CMAS at 1250℃for 4 h,merely～2 μm thick penetration layer has been formed and the structure below the penetration layer is still intact.These results demonstrate that ME(Me,Ti)0.1(Zr,Hf,Ce)0.9O2(Me=Y and Ta),espe-cially ME(Ta,Ti)0.1(Zr,Hf,Ce)0.9O2,are promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking.
文献关键词：
中图分类号：
作者姓名：
Shuaihang Qiu;Huimin Xiang;Fu-Zhi Dai;Hailong Wang;Muzhang Huang;Chunlei Wan;Qing Meng;Jiangtao Li;Xiaohui Wang;Yanchun Zhou
作者机构：
Science and Technology on Advanced Functional Composite Laboratory,Aerospace Research Institute of Materials and Processing Technology,Beijing 100076,China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;State Key Lab of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
文献出处：
引用格式：
[1]Shuaihang Qiu;Huimin Xiang;Fu-Zhi Dai;Hailong Wang;Muzhang Huang;Chunlei Wan;Qing Meng;Jiangtao Li;Xiaohui Wang;Yanchun Zhou-.Medium-entropy(Me,Ti)0.1(Zr,Hf,Ce)0.9O2(Me=Y and Ta):Promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking)[J].材料科学技术（英文版）,2022(28):144-153
A类：
calcia
B类：
Medium,entropy,Ti,Zr,Hf,Ce,9O2,Ta,Promising,thermal,barrier,materials,temperature,radiation,shielding,CMAS,blocking,With,continuous,enhancement,gas,turbine,inlet,rapid,increase,radiant,heat,fer,coating,TBC,combination,conductivity,good,performance,vital,roles,ensuring,durability,metallic,blades,However,yttria,stabilized,zirconia,YSZ,state,art,current,industry,standard,unable,meet,such,demands,since,almost,translucent,Besides,poor,corrosion,resistance,molten,magnesia,alumina,silicates,also,impedes,its,application,sand,volcanic,ash,laden,environments,In,order,improve,further,reduce,two,medium,ME,ceramics,were,designed,prepared,by,pressureless,sintering,binary,powder,pacts,this,work,presents,cubic,structure,but,trace,amount,secondary,phase,while,displays,tetragonal,wt,Both,possess,bet,than,Especially,superior,that,due,narrower,gap,correspondingly,higher,infrared,absorbance,above,waveband,oxides,significantly,lower,close,expansion,coefficients,TECs,superalloys,addition,excellent,After,attack,merely,thick,penetration,layer,been,formed,below,still,intact,These,results,demonstrate,espe,promising
AB值：
0.446768
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