Journal of Materials Research

Articles

Some basic equations for the next generation of surface testers solving the problem of pileup, sink-in, and making area-function calibration obsolete

Norbert Schwarzera1 c1

a1 Saxonian Institute of Surface Mechanics, Tankow 1, 18569 Ummanz, Germany

Abstract

In the present paper the formulas for the stiffnesses of a new and more general surface tester concept are given and discussed. The concept is based on the idea that the next generation of surface testers will provide the means to use all degrees of freedom of movement a probe on a sample surface could perform. Thus, in addition to the ordinary normal stiffness, lateral and tilting stiffness are measured, as well as twisting stiffness, and then used in the subsequent parameter determination of the investigated materials. It is shown in the paper that such a concept would not only solve classical problems such as “pileup” and “sink-in” completely, but it would also supersede the need of area-function calibration for the indenter tips and allow direct measurement of local intrinsic and residual stresses, anisotropy, and many other things, too.

(Received July 30 2008)

(Accepted November 06 2008)

Key Words:

  • Adhesion;
  • Elastic properties;
  • Nanoindentation

Correspondence:

c1 Address all correspondence to this author. e-mail: n.schwarzer@siomec.de

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