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Moisture Effects on Gold Nanowear

Published online by Cambridge University Press:  01 February 2011

Megan Pendergast,
Alex A. Volinsky,
Xiaolu Pang and
Robert Shields
Megan Pendergast
Affiliation:
mpenderg@mail.usf.edu, University of South Florida, Department of Mechanical Engineering, 4202 E. Fowler Ave. ENB118, Tampa, FL, 33620, United States
Alex A. Volinsky
Affiliation:
volinsky@eng.usf.edu, University of South Florida, Mechanical Engineering, 4202 E Fowler Ave. ENB118, Tampa, FL, 33620, United States, 813-974-5658, 813-974-3539
Xiaolu Pang
Affiliation:
xiaolupang@gmail.com, University of South Florida, Department of Mechanical Engineering, 4202 E. Fowler Ave. ENB118, Tampa, FL, 33620, United States
Robert Shields
Affiliation:
rjs@mail.usf.edu, University of South Florida, Department of Mechanical Engineering, 4202 E. Fowler Ave. ENB118, Tampa, FL, 33620, United States
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Abstract

The addition of water results in the higher wear rate of gold compared to experiments performed in the ambient environment (approximately 60% humidity). This higher wear rate in water has been observed with the AFM, Hysitron Triboindenter, and additionally in single pass scratch tests performed with the Taber Shear/Scratch tester. These tests were preformed using silicon nitride cantilevers on the AFM and a conical diamond tip in the Taber instrument. Tests performed in the ambient atmosphere resulted in slightly reduced surface roughness, while much higher wear rate was observed in the wear tests performed in water. Ambient scratch tests produced slightly shallower scratch trenches than wet scratches consistently as a function of the varied normal load. Single scan lines provide valuable information about the mechanisms and progression of the nanoscale wear. The different components of scratch friction are investigated to explore the main contributors to the nanoscale scratching of gold.

Keywords

Authin filmtribology

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References

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