Effect of substrate on crystallization of sol-gel coating

M. Chui-Sabourin, Steve Garofalini

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Sol-gel derived alumina was used to coat 316 stainless steel substrates. The coating showed crystallization starting at 1000°C. The crystalline particles were α-Al. After analyzing the interaction of some possible substrate elements with alumina sol, iron was determined to be the most important element in the crystallization of α-Al2O3. Our experiment shows, however, that coating crystallization originates from the substrate-coating interface. Substrate surface crystallography seems to play a more important role than additives in α phase nucleation. When oxide powders were used as additives, iron, manganese and chromium increased crystallization. Since the substrate surface includes iron, manganese and chromium, crystallization behavior may be a result of a combination of topography and some chemical effects.

Original languageEnglish
Pages (from-to)177-190
Number of pages14
JournalThin Solid Films
Volume198
Issue number1-2
DOIs
Publication statusPublished - Mar 20 1991

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

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