典型文献
Enhanced densification and mechanical properties of β-boron by in-situ formed boron-rich oxide
文献摘要：
We report nearly full densification of polycrystalline rhombohedral beta(β)-boron without the addition of sintering aids via spark plasma sintering(SPS).The analytical aberration corrected transmission elec-tron microscope observations have revealed in-situ growth of nanocrystalline boron-rich oxide precipi-tates that contain approximately 4 at.％of oxygen and beget the densification of β-boron.Further elec-tron energy loss spectroscopy and diffraction analysis confirmed that the newly formed boron-rich oxide(nominally B96O4)structure with B-O σ-bonding belongs to space group R3m.Depth sensitive nanoin-dentation showed boron-rich oxide phase has a hardness of about 41±2 GPa,which is 10％higher than that of β-boron matrix.The estimated hardness and fracture toughness of β-boron were approximately 31 GPa and 2.2 MPa m1/2,respectively,using Vickers microindentation,which falls in the range of those commercially used boron carbides.These results suggest that the enhanced densification and mechanical properties arise from the newly formed boron-rich oxide in β-boron during SPS experiments.
文献关键词：
中图分类号：
作者姓名：
Haibo Zhang;Metin ?rnek;Simanta Lahkar;Shuangxi Song;Xiaodong Wang;Richard A.Haber;Kolan Madhav Reddy
作者机构：
School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Department of Materials Science and Engineering,Rutgers,The State University of New Jersey,Piscataway,NJ 08854,USA
文献出处：
引用格式：
[1]Haibo Zhang;Metin ?rnek;Simanta Lahkar;Shuangxi Song;Xiaodong Wang;Richard A.Haber;Kolan Madhav Reddy-.Enhanced densification and mechanical properties of β-boron by in-situ formed boron-rich oxide)[J].材料科学技术（英文版）,2022(04):148-160
A类：
beget,B96O4,nanoin,dentation,microindentation
B类：
Enhanced,densification,mechanical,properties,boron,by,situ,formed,rich,oxide,We,report,nearly,full,polycrystalline,rhombohedral,beta,without,addition,sintering,aids,via,spark,plasma,SPS,analytical,aberration,corrected,transmission,elec,tron,microscope,observations,have,revealed,growth,nanocrystalline,precipi,tates,that,contain,approximately,oxygen,Further,energy,loss,spectroscopy,diffraction,analysis,confirmed,newly,nominally,structure,bonding,belongs,space,group,R3m,Depth,sensitive,showed,phase,hardness,about,GPa,which,higher,than,matrix,estimated,fracture,toughness,were,m1,respectively,using,Vickers,falls,range,those,commercially,used,carbides,These,results,suggest,enhanced,arise,from,during,experiments
AB值：
0.584959
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