Thermal stability enhancement of Cr2AlC coatings on Zr by utilizing a double layer diffusion barrier

Research output: Contribution to journalArticle

Authors

  • Mráz Stanislav
  • Tyra Miléna
  • Moritz to Baben
  • Hans Marcus
  • Chen Xiang
  • Herrig Friederike
  • Konstantza Lambrinou
  • Jochen M. Schneider

Institutes & Expert groups

  • RWTH - Aachen University

Documents & links

Abstract

Decomposition of Cr2AlC deposited onto a Zr substrate and vacuum-annealed is observed at 800 °C as Al diffuses from the MAX phase into the Zr substrate. A double layer of ZrN and AlN has been predicted by CALPHAD calculations to act as diffusion barrier between the Zr substrate and Cr2AlC. Experimental thermal stability investigations corroborate this prediction by confirming that the proposed double layer diffusion barrier coatings suppress the decomposition of Cr2AlC for one hour at temperatures of up to 1000 °C.

Details

Original languageEnglish
Article number40
Pages (from-to)1119-1124
Number of pages9
JournalJournal of the European Ceramic Society
Volume40
Issue number4
DOIs
Publication statusPublished - 17 Oct 2019

Keywords

  • MAX phase, Diffusion barrier, Metallic substrate, Harsh environment

ID: 6027463