Szczegóły publikacji
Opis bibliograficzny
Defect-diffusion-stress relationships in modeling the oxidation and degradation processes of alumina formers : a brief survey / J. JEDLIŃSKI // Diffusion and Defect Data – Solid State Data . Part A, Defect and Diffusion Forum ; ISSN 1012-0386. — 2005 — vols. 237–240 Pt. 2, s. 911–921. — Bibliogr. s. 919–921, Abstr. — DIMAT 2004 : Diffusion in Materials : proceedings of the 6th international conference on Diffusion in Materials : Cracow, Poland, July 18–23, 2004 / eds. M. Danielewski [et al.]. — Uetikon-Zuerich, Switzerland : TTP Trans Tech Publications Ltd., 2005
Autor
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 22360 |
|---|---|
| Data dodania do BaDAP | 2005-05-23 |
| Tekst źródłowy | URL |
| DOI | 10.4028/www.scientific.net/DDF.237-240.911 |
| Rok publikacji | 2005 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Diffusion and Defect Data. Solid State Data, Part A, Defect and Diffusion Forum |
Abstract
In the modeling of the oxidation and degradation processes of the superior metallic materials in terms of the high temperature oxidation resistance, being the so-called alumina formers, the matter transport only via grain boundaries of alpha-Al2O3 is usually taken into account. This paper indicates that such an approach needs to be re-visited. It is pointed out that the following factors should be taken into account (i) diffusion via point defects in the unstable alumina polymorphs (gamma, delta, theta) which grow during the early oxidation stages; (ii) dislocation-related processes; (iii) formation of the oxide in three-dimensional defects, being the cracks in the oxide layer; (iv) outward oxide growth resulting from the formation of the new oxide within the existing layer. The mentioned above effects as well as the other ones, related to the interfacial and stress-induced processes are illustrated and discussed. It is pointed out that alumina formers constitute a wide group of materials and several categories should be distinguished among them with respect to their composition and production route on one hand, and the oxidation and degradation mechanisms, on the other hand. It is shown that the comprehensive approach enables better and self-consistent modeling of the oxidation and degradation mechanisms of alumina formers.
