Nanoindentation of viscoelastic materials: Mechanical properties of polymer coatings on aluminum substrates

K. B. Yoder, S. Ahuja, K. T. Dihn, D. A. Crowson, S. G. Corcoran, L. Cheng, William W Gerberich

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations

Abstract

The mechanical properties of four polymer coatings on aluminum foil substrates are examined using nanoindentation with a Hysitron Triboscope, an add-on to an AFM. In addition to static hardness and modulus measurements, the viscoelastic properties of the films, which differ in Tg and extent of crosslinking, are investigated by employing two techniques: using nanoindentation parameters to fit the creep response of the material to a one-dimensional equation based on a three-element Zener model of the viscoelastic behavior of the polymer; and fitting the creep response of the material to a previously developed, three-dimensional model of the response of a viscoelastic material to indentation by a spherical indenter. It is found that the measured static moduli are about 1.5 times greater than results of fitting creep data to the 1-D model, and are a factor of 3-6 times greater than those obtained by fits of the 3-D model.

Original languageEnglish (US)
Pages (from-to)205-210
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume522
StatePublished - Dec 1 1998
EventProceedings of the 1998 MRS Spring Symposium - San Francisco, CA, USA
Duration: Apr 13 1998Apr 15 1998

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