A study on FeCrAl foam as effective catalyst support under thermal and mechanical stresses

Do Hyung Kim, Byung Yong Yu, Pil Ryung Cha, Woo Young Yoon, Ji Young Byun, Sang Hoon Kim

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Adhesion properties of washcoated γ-Al 2O 3 layer on FeCrAl metal foams were investigated. For comparison, planar FeCrAl foil was also investigated. Weight gain after washcoating was 19-20wt.% for FeCrAl foams without preoxidation. It was much higher than that of planar FeCrAl foils that went through preoxidation. Thermal shock test with 1000 cyclic heating and cooling up to 700°C showed that long term stability of washcoated γ-Al 2O 3 layer on FeCrAl foam was also good. Specific surface area of the γ-Al 2O 3 layer was reduced from 97 to 80m 2/g, but weight loss was very low and close to 0%. We attributed this superior thermal property of FeCrAl foam to minimal interfacial force built up by thermal stress at the interface of γ-Al 2O 3 layer and FeCrAl foam surface. Mechanical stress tests by ultrasonic in petroleum ether solution also showed very good robustness of washcoated γ-Al 2O 3 layer on FeCrAl foam against the stress with very low weight loss (less than 1%). Such excellent stabilities against thermal and mechanical stresses indicate that FeCrAl foam is a good candidate for catalyst supports under thermally and mechanically harsh environments.

Original languageEnglish
Pages (from-to)169-176
Number of pages8
JournalSurface and Coatings Technology
Volume209
DOIs
Publication statusPublished - 2012 Sep 25

Keywords

  • Adhesion
  • FeCrAl
  • Interfacial stress
  • Metal foam
  • Washcoat

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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