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Updated: Apr 23, 2026

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

Published on: June 9, 2023

Note: A method for minimizing oxide formation during elevated temperature nanoindentation.

I C Cheng¹, E Garcia-Sanchez¹, A M Hodge¹

¹Department of Aerospace and Mechanical Engineering, University of Southern California, 3650 McClintock Avenue OHE430, Los Angeles, California 90089, USA.

The Review of Scientific Instruments

|October 3, 2014

Summary

This summary is machine-generated.

This study introduces a method to prevent metal oxidation during high-temperature nanoindentation using vacuum oil. This technique ensures reliable nanoscale testing of materials like aluminum, copper, and tungsten at elevated temperatures.

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Area of Science:

Materials Science
Surface Science
Nanotechnology

Background:

Elevated-temperature nanoindentation requires protection against sample oxidation.
Oxide layer formation can significantly alter mechanical properties and invalidate test results.
Existing methods for high-temperature testing are often complex or insufficient.

Purpose of the Study:

To adapt and evaluate a standardized method for protecting metallic samples during high-temperature nanoindentation.
To assess the effectiveness of vacuum oil as a protective medium against oxidation at 200 °C.
To validate the methodology for reliable nanoscale mechanical testing of metals.

Main Methods:

Adapted a standardized protection method to a commercial nanoindentation instrument.
Performed nanoindentation tests on Al (100), Cu (100), and W (100) single crystals at 200 °C in vacuum oil.
Monitored surface morphology and oxidation using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS).
Compared results with tests conducted at room temperature and 200 °C without oil.

Main Results:

The vacuum oil method effectively minimized oxide formation on metallic samples at 200 °C.
Surface characterization confirmed the protective role of vacuum oil during elevated-temperature nanoindentation.
Nanoindentation tests performed with oil yielded more consistent and reliable data compared to tests without oil.
Atomic force microscopy and X-ray photoelectron spectroscopy validated the methodology's effectiveness.

Conclusions:

The adapted methodology provides a feasible and effective means to protect metallic samples during elevated-temperature nanoindentation.
Vacuum oil serves as a viable protective medium, enabling accurate nanoscale mechanical property evaluation at high temperatures.
This approach enhances the reliability of nanoindentation studies on various metallic materials under thermal stress.