Nanomechanical properties of solid surfaces and thin films

Research output: Chapter in Book/Report/Conference proceedingChapter

6 Citations (Scopus)

Abstract

Instrumentation for the testing of mechanical properties on the submicron scale has developed enormously in recent years. This has enabled the mechanical behavior of surfaces, thin films, and coatings to be studied with unprecedented accuracy. In this chapter, the various techniques available for studying nanomechanical properties are reviewed with particular emphasis on nanoindentation. The standard methods for analyzing the raw data obtained using these techniques are described, along with the main sources of error. These include residual stresses, environmental effects, elastic anisotropy, and substrate effects. The methods that have been developed for extracting thin-film mechanical properties from the often convoluted mix of film and substrate properties measured by nanoindentation are discussed. Interpreting the data is frequently difficult, as residual stresses can modify the contact geometry and, hence, invalidate the standard analysis routines. Work hardening in the deformed region can also result in variations in mechanical behavior with indentation depth. A further unavoidable complication stems from the ratio of film to substrate mechanical properties and the depth of indentation in comparison to film thickness. Even very shallow indentations may be influenced by substrate properties if the film is hard and very elastic but the substrate is compliant. Under these circumstances nonstandard methods of analysis must be used. For multilayered systems many different mechanisms affect the nanomechanical behavior, including Orowan strengthening, Hall-Petch behavior, image force effects, coherency and thermal stresses, and composition modulation. The application of nanoindentation to the study of phase transformations in semiconductors, fracture in brittle materials, and mechanical properties in biological materials are described. Recent developments such as the testing of viscoelasticity using nanoindentation methods are likely to be particularly important in future studies of polymers and biological materials. The importance of using a range of complementary methods such as electron microscopy, in situ AFM imaging, acoustic monitoring, and electrical contact measurements is emphasized. These are especially important on the nanoscale because so many different physical and chemical processes can affect the measured mechanical properties.

Original languageEnglish (US)
Title of host publicationNanotribology and Nanomechanics
Subtitle of host publicationAn Introduction
PublisherSpringer Berlin Heidelberg
Pages575-622
Number of pages48
ISBN (Print)3540242678, 9783540242673
DOIs
StatePublished - Dec 1 2005

Fingerprint

Nanoindentation
Thin films
Mechanical properties
Indentation
Substrates
Biological materials
Residual stresses
Acoustic imaging
Viscoelasticity
Testing
Brittleness
Strain hardening
Thermal stress
Electron microscopy
Environmental impact
Film thickness
Materials properties
Polymers
Anisotropy
Phase transitions

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Chemistry(all)

Cite this

Mann, A. (2005). Nanomechanical properties of solid surfaces and thin films. In Nanotribology and Nanomechanics: An Introduction (pp. 575-622). Springer Berlin Heidelberg. https://doi.org/10.1007/3-540-28248-3_12
Mann, Adrian. / Nanomechanical properties of solid surfaces and thin films. Nanotribology and Nanomechanics: An Introduction. Springer Berlin Heidelberg, 2005. pp. 575-622
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Mann, A 2005, Nanomechanical properties of solid surfaces and thin films. in Nanotribology and Nanomechanics: An Introduction. Springer Berlin Heidelberg, pp. 575-622. https://doi.org/10.1007/3-540-28248-3_12

Nanomechanical properties of solid surfaces and thin films. / Mann, Adrian.

Nanotribology and Nanomechanics: An Introduction. Springer Berlin Heidelberg, 2005. p. 575-622.

Research output: Chapter in Book/Report/Conference proceedingChapter

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Mann A. Nanomechanical properties of solid surfaces and thin films. In Nanotribology and Nanomechanics: An Introduction. Springer Berlin Heidelberg. 2005. p. 575-622 https://doi.org/10.1007/3-540-28248-3_12