Open AccessEffect of nanoindentation depth and ligament size on mechanical properties of nanoporous silver
Author(s) -
Li Zhiqiang,
Lu Xing,
Wang Qi,
Zhang Siwen
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0745
Subject(s) - nanoindentation , materials science , indentation , composite material , nanoporous , brittleness , elastic modulus , ductility (earth science) , indentation hardness , modulus , nanotechnology , microstructure , creep
Mechanical properties of nanoporous silver have been investigated by nanoindentation. Experiment shows that the hardness and elastic modulus are both involved with strong surface size effect. Under the same loading rate, hardness decreases from 56.7 to 26 MPa along with indentation depth increasing from 200 to 2000 nm, while the corresponding elastic modulus increases from 2.68 to 3.73 GPa. In the case of the same indentation depth, the hardness decreases from 53 to 7.4 MPa with ligament size increasing from 100 to 198 nm, and the corresponding elastic modulus reduces from 4.7 to 0.17 GPa. The calculated indentation size effect index m is 0.34, revealing that nanoporous silver has a good ductility in micro‐state, but brittle in the macro‐state.