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PRODUCTION OF HIGHLY GRAPHITIZED MULTIWALlED CARBON ANOTUBES

X.L.Zhao1) , T.L.Guo2) , M.Ohkohchi3) , T.Okazaki3) , S.Iijima and Y.Ando3) 1) Japan Science and Technology Corporation , Department of Physics , Meijo University , Shiogamaguchi1 501 , Tempaku ku , Nagoya 468 8502 , Japan 2) Scientific Research Department , Shenyang University , Wanghuanan Street21 , Dadong District , Shenyang 110044 , China 3) Department of Physics , Meijo University , Shiogamaguchi 1 501 , Tempaku ku , Nagoya 468 8502 , Japan$

金属学报(英文版)

Multiwalled carbon nanotubes ( MWNTs) were prepared by DCarc dischargein hydrogen gas, and werethermally purified byinfrared radiation in air. The morphology of pristineand purified MWNTs was observed by scanning electron microscope ( SEM) , and the crys tallinestructureand perfection wereinvestigated by high resolution transmission electron mi croscope( HRTEM) and Raman spectrometer. Itcameto the conclusion thatthese MWNTs possessed a high degreeof graphitization and very narrow centralchannel(about1 0 nm indiameter) , giving risetotheappearanceof breathing modesfor MWNTs.

关键词: multiwalled carbon nanotubes , null , null , null , null

THE INFLUENCE OF Bi ON THE INTERFACIAL WETTABILITY BETWEEN SiC PARTICLES AND NiCrMo ALLOY CAST IRON

J.B. Li1) , J.P. Niu1) and X. Wang2) 1) College of Machinery , Shenyang University , Shenyang 110044 , China2) BenxiIron and Steel Company , Benxi111800 , China

金属学报(英文版)

The present paper reportsasystematicinvestigation ontheinfluenceof Bielementon thein terfacial wettability of NiCrMo alloy castiron and their related mechanism by means of thesessiledrop method . Thesurfacetension hasbeen calculated and analysised . Thestudyshows thatasmallamountof Bielementcan significantlyimprovethe wettabilitybetween SiCandNiCr Moalloycastiron. Theoptimin Bicontentis0 01 wt% .

关键词: composites , null , null , null

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