典型文献
Microstructure and properties of porous Si3N4 ceramics by gelcasting-self-propagating high-temperature synthesis(SHS)
文献摘要：
Porous silicon nitride ceramics have attracted a considerable attention due to their excellent overall performance,but poor porosity homogeneity and structural shrinkage induced by prolonged high temperature sintering limit its further application.Herein,as a three-in-one solution for the above issues,for the first time we develop a novel approach that integrates the merits of gelcasting-SHS(self-propagating high-temperature synthesis)to prepare porous Si3N4 ceramics to simultaneously achieve high porosity,high strength,high toughness,and low thermal conductivity across a wide temperature range.By regulating the solid content,porous Si3N4 ceramics with homogeneous pore structure are obtained,where the pore size falls inbetween 1.61 and 4.41 μm,and the elongated grains are interlaced and interlocked to form micron-sized coherent interconnected pores.At the same time,porous Si3N4 ceramics with porosity of 67.83％to 78.03％are obtained,where the compressive strength reaches 11.79 to 47.75 MPa and fracture toughness reaches 1.20 to 6.71 MPa·m1/2.
文献关键词：
中图分类号：
作者姓名：
Shile CHEN;Liang WANG;Gang HE;Jiangtao LI;Chang-An WANG
作者机构：
State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;CAS Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China
文献出处：
引用格式：
[1]Shile CHEN;Liang WANG;Gang HE;Jiangtao LI;Chang-An WANG-.Microstructure and properties of porous Si3N4 ceramics by gelcasting-self-propagating high-temperature synthesis(SHS))[J].先进陶瓷（英文版）,2022(01):172-183
A类：
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B类：
Microstructure,properties,porous,Si3N4,ceramics,by,gelcasting,self,propagating,high,temperature,synthesis,SHS,Porous,silicon,nitride,have,attracted,considerable,attention,due,their,excellent,overall,performance,but,poor,porosity,homogeneity,structural,shrinkage,induced,prolonged,sintering,limit,further,application,Herein,three,one,solution,above,issues,first,develop,novel,approach,that,integrates,merits,prepare,simultaneously,achieve,strength,toughness,low,thermal,conductivity,across,wide,range,By,regulating,solid,content,homogeneous,obtained,where,falls,elongated,grains,interlaced,interlocked,micron,sized,coherent,interconnected,pores,At,same,compressive,reaches,fracture,m1
AB值：
0.592656
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