典型文献
Extraordinary high-temperature mechanical properties in binder-free nanopolycrystalline WC ceramic
文献摘要：
From the perspective of high-temperature applications,materials with excellent high-temperature me-chanical properties are always desirable.The present work demonstrates that the binder-free nanopoly-crystalline WC ceramic with an average grain size of 103 nm obtained by high-pressure and high-temperature sintering exhibits excellent mechanical properties at both room temperature and high tem-perature up to 1000℃.Specifically,the binder-free nanopolycrystalline WC ceramic still maintains a considerably high Vicker hardness Hv of 23.4 GPa at 1000℃,which is only 22％lower than the room temperature Hv.This outstanding thermo-mechanical stability is superior to that of typical technical ce-ramics,e.g.SiC,Si3N4,Al2O3,etc.Nanocrystalline grains with many dislocations,numerous low-energy,highly stable Σ2 grain boundaries,and a relatively low thermal expansion coefficient,are responsible for the observed outstanding high-temperature mechanical properties.
文献关键词：
中图分类号：
作者姓名：
Hongfeng Dong;Baozhong Li;BoBo Liu;Yang Zhang;Lei Sun;Kun Luo;Yingju Wu;Mengdong Ma;Bing Liu;Wentao Hu;Julong He;Dongli Yu;Bo Xu;Zhisheng Zhao;Yongjun Tian
作者机构：
Center for High Pressure Science(CHiPS),State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China;School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723001,China
文献出处：
引用格式：
[1]Hongfeng Dong;Baozhong Li;BoBo Liu;Yang Zhang;Lei Sun;Kun Luo;Yingju Wu;Mengdong Ma;Bing Liu;Wentao Hu;Julong He;Dongli Yu;Bo Xu;Zhisheng Zhao;Yongjun Tian-.Extraordinary high-temperature mechanical properties in binder-free nanopolycrystalline WC ceramic)[J].材料科学技术（英文版）,2022(02):169-175
A类：
nanopolycrystalline,nanopoly,Vicker,ramics
B类：
Extraordinary,temperature,mechanical,properties,binder,free,WC,ceramic,From,perspective,applications,materials,excellent,are,always,desirable,present,work,demonstrates,that,average,size,obtained,by,pressure,sintering,exhibits,both,room,Specifically,still,maintains,considerably,hardness,Hv,GPa,which,only,lower,than,This,outstanding,thermo,stability,superior,typical,technical,SiC,Si3N4,Al2O3,etc,Nanocrystalline,grains,many,dislocations,numerous,energy,highly,stable,boundaries,relatively,thermal,expansion,coefficient,responsible,observed
AB值：
0.497512
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