Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7893595 | Corrosion Science | 2018 | 12 Pages |
Abstract
Oxidation of single-phase and dense Ti2AlC coatings with or without a 500â¯nm TiC diffusion barrier deposited on Zircaloy-4 by annealing of nanoscale multilayer stacks between 800â¯Â°C and 1200â¯Â°C in high-temperature steam was investigated. Coatings without TiC barrier formed a duplex scale: outer θ-Al2O3 rich layer mixed with TiO2 and inner porous TiO2 layer; correspondingly, a triple-layered scale (θ-Al2O3â¯+â¯TiO2/θ-Al2O3/TiO2) grew on coatings with barrier at 800â¯Â°C. The TiC barrier suppresses the rapid diffusion of Al into the substrate, contributing to improved performance and longer life of Ti2AlC/TiC coatings. However, both coatings demonstrated low protection effect from 1000â¯Â°C in steam.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Chongchong Tang, Martin Steinbrueck, Michael Stueber, Mirco Grosse, Xiaojuan Yu, Sven Ulrich, Hans Juergen Seifert,