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Film Thickness Effects on Interfacial Fracture of Epoxy Bonds

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Abstract

Nanoindentation test techniques were combined with deposition of highly stressed overlayers to study the interfacial fracture susceptibility of spin coated Epon 828/T403 on aluminized glass substrates as a function of film thickness. The test techniques required to induce fracture differed between samples. Nevertheless, the resulting interfacial fracture energies decreased monotonically with film thickness to a value near 0.5 J/m2. This value is higher than the ‘true work of adhesion’ for uncured epoxy oliogomers on a methyl-terminated aluminum surface. However, it may indicate that we have irreversible specific interactions such as hydrogen bonding. Then 0.5 J/m2 may be near the fundamental value for such an interaction, or the ‘practical work of adhesion’.

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Authors and Affiliations

  1. Sandia National Laboratories, Livermore, CA, 94550, USA

    N. R. Moody

  2. Washington State University, Pullman, WA, 99164, USA

    D. F. Bahr & E. D. Reedy Jr

  3. Sandia National Laboratories, Albuquerque, NM, 87185, USA

    M. S. Kent & J. A. Emerson

Authors
  1. N. R. Moody
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  2. D. F. Bahr
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  3. M. S. Kent
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  4. J. A. Emerson
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  5. E. D. Reedy Jr
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Moody, N.R., Bahr, D.F., Kent, M.S. et al. Film Thickness Effects on Interfacial Fracture of Epoxy Bonds. MRS Online Proceedings Library 710, 1061 (2001). https://doi.org/10.1557/PROC-710-DD10.6.1

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  • DOI: https://doi.org/10.1557/PROC-710-DD10.6.1

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