skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Tensile cracking of a brittle conformal coating on a rough substrate

Abstract

This note examines the effect of interfacial roughness on the initiation and growth of channel cracks in a brittle film. A conformal film with cusp-like surface flaws that replicate the substrate roughness is investigated. This type of surface flaw is relatively severe in the sense that stress diverges as the cusp-tip is approached (i.e., there is a power-law stress singularity). For the geometry and range of film properties considered, the analysis suggests that smoothing the substrate could substantially increase the film’s resistance to the formation of the through-the-thickness cracks that precede channel cracking. Furthermore, smoothing the substrate’s surface has a relatively modest effect on the film stress needed to propagate a channel crack.

Authors:
 [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1249091
Report Number(s):
SAND-2016-1745J
Journal ID: ISSN 0376-9429; PII: 109
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
International Journal of Fracture
Additional Journal Information:
Journal Volume: 1; Journal Issue: 3; Journal ID: ISSN 0376-9429
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; thin film; roughness; fracture; cracking

Citation Formats

Reedy, Jr., E. D. Tensile cracking of a brittle conformal coating on a rough substrate. United States: N. p., 2016. Web. doi:10.1007/s10704-016-0109-7.
Reedy, Jr., E. D. Tensile cracking of a brittle conformal coating on a rough substrate. United States. https://doi.org/10.1007/s10704-016-0109-7
Reedy, Jr., E. D. 2016. "Tensile cracking of a brittle conformal coating on a rough substrate". United States. https://doi.org/10.1007/s10704-016-0109-7. https://www.osti.gov/servlets/purl/1249091.
@article{osti_1249091,
title = {Tensile cracking of a brittle conformal coating on a rough substrate},
author = {Reedy, Jr., E. D.},
abstractNote = {This note examines the effect of interfacial roughness on the initiation and growth of channel cracks in a brittle film. A conformal film with cusp-like surface flaws that replicate the substrate roughness is investigated. This type of surface flaw is relatively severe in the sense that stress diverges as the cusp-tip is approached (i.e., there is a power-law stress singularity). For the geometry and range of film properties considered, the analysis suggests that smoothing the substrate could substantially increase the film’s resistance to the formation of the through-the-thickness cracks that precede channel cracking. Furthermore, smoothing the substrate’s surface has a relatively modest effect on the film stress needed to propagate a channel crack.},
doi = {10.1007/s10704-016-0109-7},
url = {https://www.osti.gov/biblio/1249091}, journal = {International Journal of Fracture},
issn = {0376-9429},
number = 3,
volume = 1,
place = {United States},
year = {Thu Apr 07 00:00:00 EDT 2016},
month = {Thu Apr 07 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Cohesive zone simulations of crack growth along a rough interface between two elastic–plastic solids
journal, October 2008


Determination of the effective mode-I toughness of a sinusoidal interface between two elastic solids
journal, September 2007


Toughness of a patterned interface between two elastically dissimilar solids
journal, December 2012


On the mechanics of sinusoidal interfaces between dissimilar elastic–plastic solids subject to dominant mode I
journal, November 2014


Effects of non-planarity on the mixed mode fracture resistance of bimaterial interfaces
journal, March 1989


Cracking of thin bonded films in residual tension
journal, January 1992


Mixed Mode Cracking in Layered Materials
book, January 1991


Determination of the effective mode-I toughness of a sinusoidal interface between two elastic solids
journal, October 2007