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Hot nanoindentation in inert environments.

Jonathan C Trenkle¹, Corinne E Packard, Christopher A Schuh

¹Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

The Review of Scientific Instruments

|August 7, 2010

Summary

A new instrument enables nanoindentation testing up to 500°C in controlled atmospheres. This high-temperature nanoindentation technique accurately measures material properties like hardness and elastic modulus.

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Area of Science:

Materials Science
Mechanical Engineering
Nanotechnology

Background:

Nanoindentation is a key technique for measuring mechanical properties of materials at the nanoscale.
High-temperature mechanical property testing is crucial for materials used in demanding environments.
Existing nanoindentation methods are often limited to room temperature or require complex setups for elevated temperatures.

Purpose of the Study:

To describe a novel instrument for performing nanoindentation at temperatures up to 500°C.
To identify and address technical challenges associated with high-temperature nanoindentation.
To demonstrate the instrument's capability by measuring properties of different materials.

Main Methods:

Development of a specialized nanoindentation instrument capable of operation up to 500°C.
Implementation of controlled inert atmospheres (vacuum to near atmospheric pressure).
Addressing challenges such as thermal drift, noise, tip erosion, and radiative heating.

Main Results:

The instrument successfully performed nanoindentation at elevated temperatures.
Preferred operating conditions were identified for testing various materials.
Hardness and elastic modulus of fused silica, aluminum, and copper were measured and compared favorably with existing data.

Conclusions:

The developed instrument is a viable tool for high-temperature nanoindentation.
The study provides a foundation for further research into the mechanical behavior of materials at elevated temperatures.
The technique offers a reliable method for characterizing materials under conditions relevant to various industrial applications.