Journal
TRIBOLOGY INTERNATIONAL
Volume 156, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2021.106857
Keywords
High entropy alloys; Wear; Self-lubricating; Laser cladding
Categories
Funding
- Russian Science Foundation [20-19-00304]
- Russian Science Foundation [20-19-00304] Funding Source: Russian Science Foundation
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A self-lubricating high entropy alloy (HEA) coating was in-situ prepared by laser cladding, with the segregation of nearly pure copper providing a protective oxide layer during dry sliding conditions. This study demonstrates the potential for using laser cladding as a high throughput process to rapidly fabricate self-lubricating HEA coatings by combining the intrinsic features of HEAs and additive manufacturing.
High entropy alloys (HEAs) have provided a unique opportunity to design novel structure-function integrated materials through modulating chemical composition and tailoring microstructural features. In this study, a novel self-lubricating CoCrCu1-xFeNix (x = 0, 0.1, 0.3 and 0.5) HEA coating was in-situ prepared by laser cladding. The adequate amount of nearly pure copper segregated into the interdendritic regions could effectively smear the surface of the alloy and provide a Cu-rich protective oxide layer during dry sliding condition at an intermediate temperature of 400 degrees C. These findings serve as a proof of concept for the application of laser cladding as a high throughput process to rapidly fabricate self-lubricating HEA coatings through combining the intrinsic features of HEAs and additive manufacturing.
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