Application of Transmitted Kikuchi Diffraction in Studying Nano-oxide and Ultrafine Metallic Grains

Title
Application of Transmitted Kikuchi Diffraction in Studying Nano-oxide and Ultrafine Metallic Grains
Authors
Majid Abbasi김동익Hwan-Uk GuimMorteza HosseiniHabib Danesh-ManeshMehrdad Abbasi
Keywords
transmitted Kikuchi diffraction; accumulative roll bonding; transmitted EBSD; oxidation; orientation imaging in TEM; nanograins; ultrafine grains
Issue Date
2015-11
Publisher
ACS Nano
Citation
VOL 9, NO 11, 10991-11002
Abstract
Transmitted Kikuchi diffraction (TKD) is an emerging SEM-based technique that enables investigation of highly refined grain structures. It offers higher spatial resolution by utilizing conventional electron backscattered diffraction equipment on electron-transparent samples. A successful attempt has been made to reveal nano-oxide grain structures as well as ultrafine severely deformed metallic grains. The effect of electron beam current was studied. Higher beam currents enhance pattern contrast and intensity. Lower detector exposure times could be employed to accelerate the acquisition time and minimize drift and carbon contamination. However, higher beam currents increase the electron interaction volume and compromise the spatial resolution. Lastly, TKD results were compared to orientation mapping results in TEM (ASTAR). Results indicate that a combination of TKD and EDS is a capable tool to characterize nano-oxide grains such as Al2O3 and Cr2O3 with similar crystal structures.
URI
http://pubs.kist.re.kr/handle/201004/51085
ISSN
19360851
Appears in Collections:
KIST Publication > Article
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