Title

Cold sprayed aluminum based glassy coating: Synthesis, wear and corrosion properties

Authors

Authors

D. Lahiri; P. K. Gill; S. Scudino; C. Zhang; V. Singh; J. Karthikeyan; N. Munroe; S. Seal;A. Agarwal

Comments

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Abbreviated Journal Title

Clin. Pharmacol. Ther.

Keywords

Cold spraying; Aluminum based metallic glass; Coating; Wear resistance; Corrosion resistance; BULK METALLIC-GLASS; AMORPHOUS PHASE-FORMATION; GAS-ATOMIZED POWDERS; FORMING ABILITY; NACL SOLUTION; ALLOYS; CRYSTALLIZATION; RESISTANCE; BEHAVIOR; NANOCRYSTALLINE; Materials Science, Coatings & Films; Physics, Applied

Abstract

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.

Journal Title

Surface & Coatings Technology

Volume

Surf. Coat. Technol.

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

33

Last Page

40

WOS Identifier

232

ISSN

0257-8972

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