Volume 128, Number 3, November 2019
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||03 January 2020|
Vacancy defects and their influence on mechanical properties in as-dealloyed and Fe+ ion irradiated nanoporous Au
1 Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI Kalpakkam 603 102, Tamil Nadu, India
2 Centre for Nanotechnology Research, Department of Humanities and Sciences, AarupadaiVeedu Institute of Technology, Vinayaka Mission's Research Foundation - Paiyanoor, Chennai 603 104, Tamil Nadu, India
Received: 8 August 2019
Accepted: 12 November 2019
Continuous depth sensing nano-indentation hardness measurements coupled with low-energy positron beam Doppler broadening line shape measurements were performed to investigate the influence of vacancy defects on mechanical properties in as-dealloyed and Fe+ ion irradiated nanoporous Au. A linear relationship has been obtained from the actual data between the nano-indentation hardness and square root of the concentration of defects. It suggests that the vacancy-type defects that evolved in the ligaments play a significant role in the modification of mechanical properties in both as-dealloyed and Fe+ ion irradiated nanoporous Au. The results have been also compared with those obtained on bulk Au.
PACS: 62.25.-g – Mechanical properties of nanoscale systems / 81.07.-b – Nanoscale materials and structures: fabrication and characterization / 78.70.Bj – Positron annihilation
© EPLA, 2020
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