Journal
CORROSION SCIENCE
Volume 166, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.108424
Keywords
Thermal barrier coatings; Platinum; Hafnium; Thermal cycling; Rumpling
Funding
- National Natural Science Foundation of China [51671202, 51301184]
- R&D Program in Key Fields of Guangdong Province [20198010936001]
- Liaoning BaiQianWan Talents Program
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Thermal cycling behavior of thermal barrier coatings deposited on Hf-doped (Ni,Pt)Al bond coats were investigated, comparing with conventional (Ni,Pt)Al at 1100 degrees C, to elucidate the effect of Hf addition into (Ni,Pt)Al bond coat on failure mode of TBCs. The results revealed that thermal cycling resistance of TBCs was significantly improved with addition of Hf, where relatively lower oxidation rate constant and decreased scale rumpling tendency were achieved. The effects of Hf incorporation on scale rumpling tendency and failure modes of the TBCs were discussed. Moreover, residual stress, Young's modulus and hardness in top coat were determined with increasing thermal cycles.
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