Sliding Wear of Spark Plasma Sintered CrFeCoNiCu High-Entropy Alloy Coatings: Effect of Aluminum Addition

Journal Article · Thu Nov 15 04:00:00 EST 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3654-6· OSTI ID:22863209

Ji, Xiulin ^[1]; Alavi, S. Habib; Harimkar, Sandip P. ^[2]; Zhang, Yingtao ^[1]

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1. Hohai University, College of Mechanical and Electrical Engineering (China)
2. Oklahoma State University, School of Mechanical and Aerospace Engineering (United States)

High-entropy alloys (HEAs) are considered as attractive coating materials due to their high hardness, good wear and corrosion resistance. Al{sub x}CrFeCoNiCu (x = 0, 1, 2, 3) high-entropy alloy coatings were fabricated on carbon steel substrate using spark plasma sintering. The microstructure evolved from FCC to FCC–BCC mixed structure. Al{sub 3}CrFeCoNiCu coating possesses an average hardness of approximately 682 HV{sub 0.2}, which is the highest hardness in all of the HEA coatings. The dry sliding wear behavior of the HEA coatings was investigated using a ball-on-disk sliding tribo-meter with a silicon nitride ball. In all of the HEA coatings, Al{sub 3}CrFeCoNiCu presents the lowest wear rate 8.81 × 10{sup −5} mm{sup 3} m{sup −1} and Al{sub 2}CrFeCoNiCu has the lowest coefficient of friction 0.195 during 1000 m sliding distance at 0.1 m s{sup −1} sliding velocity under 20 N normal load. Comparing with AISI 52100 steel, spark plasma sintered Al{sub 2}CrFeCoNiCu and Al{sub 3}CrFeCoNiCu HEA coatings exhibit outstanding sliding wear resistance and extremely low friction coefficient. The wear resistance of Al{sub 3}CrFeCoNiCu HEA coating is approximately four times better than the bearing steel, showing a promising application as a wear-resistant material.

• OSTI ID: 22863209
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 11 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ADDITIONS
BCC LATTICES
CARBON STEELS
CHROMIUM COMPOUNDS
COATINGS
COBALT COMPOUNDS
COMPARATIVE EVALUATIONS
COPPER COMPOUNDS
CORROSION RESISTANCE
ENTROPY
FCC LATTICES
FRICTION FACTOR
HARDNESS
IRON COMPOUNDS
MICROSTRUCTURE
NICKEL COMPOUNDS
SILICON NITRIDES
SINTERING
SUBSTRATES
WEAR RESISTANCE