Journal of Materials Science

, Volume 47, Issue 4, pp 1621–1630

The influence of Zr layer thickness on contact deformation and fracture in a ZrN–Zr multilayer coating

Authors

    • Department of Materials EngineeringIndian Institute of Science
  • Vikram Jayaram
    • Department of Materials EngineeringIndian Institute of Science
E-MRS MACAN

DOI: 10.1007/s10853-011-6001-y

Cite this article as:
Verma, N. & Jayaram, V. J Mater Sci (2012) 47: 1621. doi:10.1007/s10853-011-6001-y

Abstract

In order to understand the influence of ductile metal interlayer on the overall deformation behavior of metal/nitride multilayer, different configurations of metal and nitride layers were deposited and tested under indentation loading. To provide insight into the trends in deformation with multilayer spacings, an FEM model with elastic-perfect plastic metal layers alternate with an elastic nitride on top of an elastic–plastic substrate. The strong strain mismatch between the metal and nitride layers significantly alters the stress field under contact loading leading to micro-cracking in the nitride, large tensile stresses immediately below the contact, and a transition from columnar sliding in thin metal films to a more uniform bending and microcracking in thicker coatings.

Copyright information

© Springer Science+Business Media, LLC 2011