An improved loop test for experimentally approaching the intrinsic strength of alumina nanoscale whiskers

Wang, Shiliang, He, Shiliang, Huang, Han, Zou, Jin, Auchterlonie, Graeme John, Hou, Lizhen and Huang, Baiyun (2013) An improved loop test for experimentally approaching the intrinsic strength of alumina nanoscale whiskers. Nanotechnology, 24 28: 285703.1-285703.7. doi:10.1088/0957-4484/24/28/285703


Author Wang, Shiliang
He, Shiliang
Huang, Han
Zou, Jin
Auchterlonie, Graeme John
Hou, Lizhen
Huang, Baiyun
Title An improved loop test for experimentally approaching the intrinsic strength of alumina nanoscale whiskers
Journal name Nanotechnology   Check publisher's open access policy
ISSN 0957-4484
1361-6528
Publication date 2013-07
Sub-type Article (original research)
DOI 10.1088/0957-4484/24/28/285703
Volume 24
Issue 28
Start page 285703.1
End page 285703.7
Total pages 7
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Collection year 2014
Language eng
Formatted abstract
An improved loop test, which consists of twisting a loop in a nanoscale whisker adhered to a transmission electron microscopy (TEM) grid or other flat substrate and pulling the ends until the loop breaks, was developed for experimentally approaching the intrinsic strength of the whisker material. Alumina whiskers with diameters in the 82-320 nm range, as test targets, exhibited an average fracture strength of 39.1 GPa with a maximum of 48.8 ± 1.8 GPa, which is close to the theoretical prediction of ∼46 GPa. In situ TEM fracture analysis demonstrated the brittle fracture of alumina whiskers with thicknesses down to 82 nm. Conventional SEM/TEM imaging induced fracture of the whisker loops that had experienced high strain and a possible mechanism were discussed.
Keyword Silicon nanowires
Bending strength
Carbon nanotubes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 18 Jul 2013, 11:54:40 EST by Professor Han Huang on behalf of School of Mechanical and Mining Engineering