Mechanical characterization of metallic thin films by bulge and scratch testing

Javed H, Merle B, Preiß E, Hivet R, Benedetto A, Göken M (2016)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2016

Journal

Surface & Coatings Technology Elsevier

Publisher: Elsevier

Book Volume: 289

Pages Range: 69-74

DOI: 10.1016/j.surfcoat.2016.01.051

Abstract

The mechanical properties of 20-nm thick silver, titanium and nickel-chromium alloy films encapsulated between two silicon nitride ceramic layers are investigated by bulge and scratch tests. Bulge tests are used in order to measure the yield strength of the metallic films. An unexpected strain-softening behavior is observed for a silver sample, which is rationalized as a measurement artifact due to the delamination of the film from its substrate. An experimental workaround is proposed and shown to yield correct measurements. The adhesion strength of the metallic films is measured by scratch tests, and their failure mechanism is characterized by in-situ optical observations. All in all, the poorest mechanical properties are found in the silver. This is probably due to a combination of the low adhesion at the interface between the nitride and the metal and the low yield stress of the silver.

Authors with CRIS profile

Hassan Javed Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Benoit Merle Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Eva Preiß Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Exzellenz-Cluster Engineering of Advanced Materials (EAM) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

In-situ nanomechanics and FIB tomography of thin films (EXC315 EAM (A2-3)) Exzellenz-Cluster Engineering of Advanced Materials Nov. 1, 2012 - Oct. 31, 2017

Involved external institutions

St Gobain Sarl FR France (FR)

How to cite

APA:

Javed, H., Merle, B., Preiß, E., Hivet, R., Benedetto, A., & Göken, M. (2016). Mechanical characterization of metallic thin films by bulge and scratch testing. Surface & Coatings Technology, 289, 69-74. https://doi.org/10.1016/j.surfcoat.2016.01.051

MLA:

Javed, Hassan, et al. "Mechanical characterization of metallic thin films by bulge and scratch testing." Surface & Coatings Technology 289 (2016): 69-74.

BibTeX: Download