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Volume 15
Issue 6
10.3390/coatings15060667
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Effect of Nb on Laves Phase Formation and Wear Resistance in Laser-Cladding CrFeNi Medium-Entropy Alloy Coatings

by
Zehuan Chen
1,2,
Fangyan Luo
1,2,
Hongtao Jin
1,2,
Zhen Peng
1,
Wenqing Shi
3 and
Jiang Huang
1,2,*
1
College of Electronics and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China
2
Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Guangdong Ocean University, Zhanjiang 524088, China
3
School of Materials Science and Engineering, Guangdong Ocean University, Yangjiang 529500, China
*
Author to whom correspondence should be addressed.
Coatings 2025, 15(6), 667; https://doi.org/10.3390/coatings15060667 (registering DOI)
Submission received: 2 May 2025 / Revised: 24 May 2025 / Accepted: 29 May 2025 / Published: 30 May 2025
(This article belongs to the Special Issue Effects of Laser Treatment on Surface Characterization and Mechanical Properties of Alloys, 2nd Edition)
Versions Notes

Abstract

In this study, 20 wt.% of Nb was incorporated into a CrFeNi medium-entropy alloy (MEA) powder system to prepare CrFeNi-Nb composite coatings on a Q235B mild steel substrate by laser cladding technology. The effects of Nb addition on the phase composition, microstructure, and wear resistance of CrFeNi coatings were systematically investigated. Microstructural characterization revealed that the CrFeNi coating exhibited a single face-centered cubic (FCC) phase structure, while the CrFeNi-Nb composite coating demonstrated a dual-phase structure comprising FCC phase and Laves phase. The Laves phase significantly enhanced the microhardness and wear resistance of the coating. The average microhardness of the CrFeNi-Nb coating increased by 259.62% compared to the substrate and 190.58% compared to the Nb-free CrFeNi coating. The average coefficient of friction (COF) of the coating decreased from 0.74 to 0.68; the wear rate reduced from 5.77 × 10−4 mm3 N−1 m−1 to 2.26 × 10−4 mm3 N−1 m−1; and the weight loss decreased from 10.77 mg to 4.3 mg. The experimental results demonstrated that the addition of Nb promoted the formation of the Laves phase in the CrFeNi MEA, which effectively improved the wear resistance of the coating.
Keywords: CrFeNi MEA; Nb; Laves phase; wear resistance CrFeNi MEA; Nb; Laves phase; wear resistance

Share and Cite

MDPI and ACS Style

Chen, Z.; Luo, F.; Jin, H.; Peng, Z.; Shi, W.; Huang, J. Effect of Nb on Laves Phase Formation and Wear Resistance in Laser-Cladding CrFeNi Medium-Entropy Alloy Coatings. Coatings 2025, 15, 667. https://doi.org/10.3390/coatings15060667

AMA Style

Chen Z, Luo F, Jin H, Peng Z, Shi W, Huang J. Effect of Nb on Laves Phase Formation and Wear Resistance in Laser-Cladding CrFeNi Medium-Entropy Alloy Coatings. Coatings. 2025; 15(6):667. https://doi.org/10.3390/coatings15060667

Chicago/Turabian Style

Chen, Zehuan, Fangyan Luo, Hongtao Jin, Zhen Peng, Wenqing Shi, and Jiang Huang. 2025. "Effect of Nb on Laves Phase Formation and Wear Resistance in Laser-Cladding CrFeNi Medium-Entropy Alloy Coatings" Coatings 15, no. 6: 667. https://doi.org/10.3390/coatings15060667

APA Style

Chen, Z., Luo, F., Jin, H., Peng, Z., Shi, W., & Huang, J. (2025). Effect of Nb on Laves Phase Formation and Wear Resistance in Laser-Cladding CrFeNi Medium-Entropy Alloy Coatings. Coatings, 15(6), 667. https://doi.org/10.3390/coatings15060667

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