University of Illinois Urbana-Champaign

Laser induced thin film spallation

Wang, Junlan; Sottos, Nancy R.; Weaver, Richard L.

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https://hdl.handle.net/2142/112654

Description

Title
Laser induced thin film spallation
Author(s)
  • Wang, Junlan
  • Sottos, Nancy R.
  • Weaver, Richard L.
Issue Date
2000-05
Keyword(s)
  • Elastic Waves
  • Pulsed Laser
Abstract
We report studies of the generation of elastic waves by a pulsed laser and the associated spalling of the thin surface films by the corresponding high stresses. Numerical and analytic results from a thermo-elastic model for the stress generation are presented. Qualitative observations of spallation as a function of substrate thickness, film thickness, laser energy, and various parameters governing the source are made. Surface displacement due to the stress wave is measured by optical interferometry and used to infer the stresses on the film interface. The work is conducted with a view towards testing of thin film adhesion under a variety of mixed mode dynamic loading conditions.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 944
  • 2000-6019
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112654
Copyright and License Information
Copyright 2000 Board of Trustees of the University of Illinois

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Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.