典型文献
3D printing "wire-on-sphere" hierarchical SiC nanowires/SiC whiskers foam for efficient high-temperature electromagnetic wave absorption
文献摘要：
Electromagnetic wave absorption(EWA)materials for use in extreme environments are of great interest.Herein,SiC nanowires/SiC whiskers(SiCnw/SiCw)foam with unique"wire-on-sphere"hierarchical struc-ture was developed for efficient high-temperature EWA.SiCw were assembled to porous SiCw spheres via spray drying and then SiCw spheres were 3D printed to SiCw foam.The catalyst-free precursor infiltration pyrolysis process was first developed to ensure that SiCnw can intentionally grow in situ on the surface of SiCw spheres,thereby achieving"wire-on-sphere"hierarchical structure foam.At room-temperature,the maximum electromagnetic wave effective absorption bandwidth(EABmax)and minimum electromag-netic wave reflection coefficient(RCmin)of SiCnw/SiCw foam can reach 4 GHz and-57 dB,respectively.At 600℃,the EABmax and RCmin were 3 GHz and-15 dB,respectively.Furthermore,even oxidized at 1000-1500℃,SiCnw/SiCw foam can still retain EABmax ranging from 2.7 to 3.9 GHz and RCmin ranging from-16 dB to-64 dB,because the formation of SiO2 layer with appropriate thickness can boost interfacial polarization and regulate impedance matching.The SiCnw/SiCw foam also shows the flexural strength as high as 17.05 MPa.All results demonstrate that the SiCnw/SiCw foam is a promising EWA material for applications of harsh environments.And the material-independent"wire-on-sphere"hierarchical struc-ture and its novel preparation process should find the widespread use in the design and fabrication of high-efficiency EWA micro-nano materials.
文献关键词：
中图分类号：
作者姓名：
Xinyuan Lv;Fang Ye;Laifei Cheng;Litong Zhang
作者机构：
Science and Technology on Thermostructural Composite Materials Laboratory,Northwestern Polytechnical University,Xi'an 710072,China
文献出处：
引用格式：
[1]Xinyuan Lv;Fang Ye;Laifei Cheng;Litong Zhang-.3D printing "wire-on-sphere" hierarchical SiC nanowires/SiC whiskers foam for efficient high-temperature electromagnetic wave absorption)[J].材料科学技术（英文版）,2022(14):94-104
A类：
RCmin
B类：
printing,hierarchical,nanowires,whiskers,foam,high,temperature,electromagnetic,wave,absorption,Electromagnetic,EWA,materials,extreme,environments,are,great,interest,Herein,SiCnw,SiCw,unique,was,developed,were,assembled,porous,spheres,via,spray,drying,then,printed,catalyst,free,precursor,infiltration,pyrolysis,process,first,ensure,that,can,intentionally,grow,situ,surface,thereby,achieving,structure,At,room,maximum,effective,bandwidth,EABmax,minimum,reflection,coefficient,reach,GHz,dB,respectively,Furthermore,even,oxidized,still,retain,ranging,from,because,formation,SiO2,layer,appropriate,thickness,boost,interfacial,polarization,regulate,impedance,matching,also,shows,flexural,strength,All,results,demonstrate,promising,applications,harsh,And,independent,its,novel,preparation,should,find,widespread,design,fabrication,efficiency,micro
AB值：
0.436375
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