Open AccessSTUDIES OF HEXAGONAL DIAMOND OF NANO-GRAIN IN GRAPHITE SURFACE PRODUCED BY Ar+ ION BOMBARDMENT
Author(s) -
Zhenxia Wang,
Guoqing Yu,
Meiling Ruan,
Zhu Fu-Ying,
Dong Zhu,
Pan Haochang,
Hongjie Xu
Publication year - 2000
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.49.1524
Subject(s) - materials science , nucleation , high resolution transmission electron microscopy , graphite , diamond , microstructure , transmission electron microscopy , nano , grain size , ion , grain growth , crystallography , analytical chemistry (journal) , composite material , nanotechnology , chemistry , organic chemistry , chromatography
Hexagonal diamond nano-grains in irradiated surface of graphite produced by ion bombardment at high doses of 0.6keV Ar+ have been found,using high-resolution transmission electron microscopy (HRTEM).The average diameter (D) of the grains was varied between 2 and 50nm,and the grain population decreases almost monotonic ally as grain size increases.It is of interest to note that they exhibit a distinctly bimodal structure.For diameters less than 10nm,the microstructure of grains are single crystals,but the polycrystal structure of nano-grains with larger diameter (>10nm) can be also observed.The characteristics of this bimodal structure are on the basis of hexagonal diamond nano-grain nucleation and growth mechanisms,which are restricted by the characteristics of ion bombardment processes.