Journal
CORROSION SCIENCE
Volume 102, Issue -, Pages 222-232Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.10.011
Keywords
Intermetallics; Rare earth elements; Thermal cycling; Oxidation; Interfaces; Segregation
Funding
- National Basic Research Program (973 Program) of China [2012CB625100]
- Nature Science Foundations of China (NFSC) [51231001, 51201005, 51271011, 51471019]
- 863 project [2012AA03A512]
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The microstructure and cyclic oxidation behavior of minor Hf-doped NiAl alloys with addition of different alloying elements including Mo, Ta, and Re were investigated. Co-precipitation of Ta and Hf as well as Re and Hf occurred during alloy preparation, whereas Mo and Hf precipitated individually into different phases. Over 0.5 at.% addition of Mo, Ta and Re had negative influence on the oxidation behavior of beta-NiAlHf alloy, while the effect could be ignorable once the concentration reduced to less than 0.05 at.%. The interaction mechanism between Ta and Hf as well as Re and Hf was discussed. (C) 2015 Elsevier Ltd. All rights reserved.
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