The lateral growth strain accompanying the formation of a thermally grown oxide

The high-temperature oxidation of alloys produces an oxide that grows laterally as well as thickening with time. Constrained by the underlying alloy being oxidized, the lateral strain produces a compressive stress in the growing oxide. The lateral growth strain is modeled using a dislocation climb p...

Full description

Saved in:
Bibliographic Details
Published inActa materialia Vol. 51; no. 5; pp. 1393 - 1407
Main Author Clarke, D.R.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 14.03.2003
Elsevier Science
Subjects
Applied sciences
Exact sciences and technology
Grain boundary diffusion
Heat treatment
Mechanical properties
Metals. Metallurgy
Modeling
Oxidation
Production techniques
Thermochemical treatment and diffusion treatment
Mechanical properties
Oxidation
Grain boundary diffusion
Modeling
Aluminium oxide
Thermochemical treatment
Oxide layer
Theoretical study
Hot corrosion
Experimental study
Dislocation climb
Compressive stress
Growth stress
Strain rate
Online AccessGet full text

Cover

More Information
Summary:The high-temperature oxidation of alloys produces an oxide that grows laterally as well as thickening with time. Constrained by the underlying alloy being oxidized, the lateral strain produces a compressive stress in the growing oxide. The lateral growth strain is modeled using a dislocation climb process in which “unlucky” counter-diffusing cations and anions are trapped at cores of dislocations. The model predicts that at a fixed oxidation temperature the lateral growth strain rate increases linearly with the oxide thickening rate in accord with observations.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1359-6454
1873-2453
DOI:10.1016/S1359-6454(02)00532-3