Journal
SURFACE & COATINGS TECHNOLOGY
Volume 240, Issue -, Pages 286-292Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2013.12.043
Keywords
Bulk amorphous alloy; Zr substrate; Laser processing; Coating; Wear
Funding
- W. M. Keck Foundation
- Joint Center for Aerospace Technology Innovation (Seattle, WA)
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Laser Engineered Net Shaping (LENS (TM)), a commercially available laser-based additive manufacturing technique, was employed for the processing of Fe-bulk amorphous alloy (Fe-BAA) coating on zirconium. SEM analysis revealed an amorphous-crystalline mixed phase composite microstructure of the coating. Crystalline phase was dispersed in an amorphous matrix. Moreover, considerable mixing of the Fe BAA in the zirconium substrate was noticed. The Fe BAA coatings showed 800% increase in hardness and decrease in normalized wear volume was similar to 30 times compared to the control Zr substrate. During the wear testing in 3.5% NaCl solution, Fe BAA coatings showed evidence of fretting corrosion. Overall, our results demonstrate that laser processing can be used to deposit amorphous coatings on Zr substrate. (C) 2013 Elsevier B.V. All rights reserved.
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