期刊
SURFACE & COATINGS TECHNOLOGY
卷 232, 期 -, 页码 33-40出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2013.04.049
关键词
Cold spraying; Aluminum based metallic glass; Coating; Wear resistance; Corrosion resistance
Al-based glassy coatings were synthesized using cold spraying technique to protect 6061 aluminum surface from wear and corrosion. Gas atomized Al90.05Y4.4Ni4.3Co0.9Sc0.35 (at.%) powder was used as the starting powder. Dense (98%) coatings with a uniform thickness of similar to 250 mu m were deposited. The coatings retained the glassy structure of the powder with few nanocrystals embedded in the amorphous matrix. Ball-on-disk wear of the coatings showed 600% improvement in the wear resistance as compared to 6061Al substrate. Potentiodynamic studies of the coatings in varying NaCl concentrations displayed 5 times better corrosion resistance than 6061 Al substrate, which was attributed to the active passivation and the chemical homogeneity of the coatings. (C) 2013 Elsevier B.V. All rights reserved.
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