10.1111/j.1151-2916.1981.tb09557.x
Crossref journal-article
Wiley
Journal of the American Ceramic Society (311)
Abstract

The assignment of boundary values for the chemical potential and the calculation of energy‐release rates for the growth of creep cavities along grain boundaries by self‐diffusion are discussed. For simplicity, it is assumed that the boundaries are flat and that surface and grain‐boundary diffusion are the dominant transport mechanisms. As matter diffuses from the void surface into and along the grain boundary, misfit residual stresses are induced to alleviate the high stress concentration ahead of the cavity apex. As a result, the contribution of strain‐energy terms to the chemical potential can be neglected in typical cases. Also, contrary to the Griffith crack‐extension model, the energy dissipation incurred by diffusive removal of material from the cavity surface and deposition in the grain boundary is a major term in the energy transfers associated with cavity growth. The primary energy “sink” in diffusive cavity growth is shown to arise from the work done by the grain‐boundary normal stress when matter is inserted in the near‐tip region by diffusion, not from the loss of strain energy of matter that is removed from the cavity at its tip or from the work of bond separation. Thermodynamic restrictions on the angle formed by the void surfaces at their apex, where they join the grain boundary, are considered. Boundary values for the chemical potential are derived in a manner appropriate for arbitrarily large but elastic distortions of material near the cavity tip and, in contrast to most previous work in the area, the effects of surface tension (i.e. of “surface stress,” as distinct from surface energy) are included.

Bibliography

RICE, J. R., & CHUANG, T. (1981). Energy Variations in Diffusive Cavity Growth. Journal of the American Ceramic Society, 64(1), 46–53. Portico.

Authors 2
  1. JAMES R. RICE (first)
  2. TZE‐JER CHUANG (additional)
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Dates
Type When
Created 19 years, 2 months ago (June 6, 2006, 7:30 p.m.)
Deposited 1 year, 10 months ago (Oct. 8, 2023, 11:33 a.m.)
Indexed 2 months ago (June 24, 2025, 6:48 a.m.)
Issued 44 years, 7 months ago (Jan. 1, 1981)
Published 44 years, 7 months ago (Jan. 1, 1981)
Published Online 19 years, 2 months ago (June 2, 2006)
Published Print 44 years, 7 months ago (Jan. 1, 1981)
Funders 0

None

@article{RICE_1981, title={Energy Variations in Diffusive Cavity Growth}, volume={64}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/j.1151-2916.1981.tb09557.x}, DOI={10.1111/j.1151-2916.1981.tb09557.x}, number={1}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={RICE, JAMES R. and CHUANG, TZE‐JER}, year={1981}, month=jan, pages={46–53} }