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

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

doi:10.1016/j.jeurceramsoc.2019.10.008

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

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

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1119-1124
Number of pages	6
Journal	Journal of the European Ceramic Society
Volume	40
Issue number	4
Early online date	17 Oct 2019
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2019.10.008
Publication status	Published - 1 Apr 2020

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title = "Thermal stability enhancement of Cr2AlC coatings on Zr by utilizing a double layer diffusion barrier",

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.",

keywords = "Diffusion barrier, Harsh environment, MAX phase, Metallic substrate, Thermal stability",

author = "Stanislav Mr{\'a}z and Mil{\'e}na Tyra and {to Baben}, Moritz and Marcus Hans and Xiang Chen and Friederike Herrig and Konstantina Lambrinou and Schneider, {Jochen M.}",

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T1 - Thermal stability enhancement of Cr2AlC coatings on Zr by utilizing a double layer diffusion barrier

AU - Mráz, Stanislav

AU - Tyra, Miléna

AU - to Baben, Moritz

AU - Hans, Marcus

AU - Chen, Xiang

AU - Herrig, Friederike

AU - Lambrinou, Konstantina

AU - Schneider, Jochen M.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - 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.

AB - 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.

KW - Diffusion barrier

KW - Harsh environment

KW - MAX phase

KW - Metallic substrate

KW - Thermal stability

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M3 - Article

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SP - 1119

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JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 4

ER -

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

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