期刊
CORROSION SCIENCE
卷 103, 期 -, 页码 105-116出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.11.011
关键词
Alloy; Metal coatings; High temperature corrosion; Oxidation
资金
- National Natural Science Foundation of China [51261027]
- Aviation Science Foundation of China [2014ZE56013]
- Natural Science Foundation of Jiangxi Province in China [20132BAB206012]
- Key Technology Projects of Jiangxi Province in China [20133BBM26115]
The influence of milling time on the microstructure evolution and oxidation behavior of NiCrAlY coatings generated by laser induction hybrid cladding was investigated. Mechanical milling induced gamma'-Ni3Al formation in the NiCrAlY powder. With longer milling times, the NiCrAlY coatings experienced an equiaxed-to-columnar transition, and their compositions became homogenized. Furthermore, the relative intensities of the diffraction peaks of alpha-Al2O3, Cr2O3 and NiCr2O4 decreased and the oxidation resistance of the NiCrAlY coatings improved. Therefore, milling time is another critical parameter for the control of the columnar growth in NiCrAlY coatings, whose oxidation kinetics depend on both the grain boundaries and lattice diffusion. (C) 2015 Elsevier Ltd. All rights reserved.
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