| METALS AND METAL MATRIX COMPOSITES |
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| Influence of Si Content on the Mechanical and Tribological Properties of Laser Cladding FeCoNiBSiNb Amorphous Alloy Composite Materials |
| DU Xian1, YU Dongxin1,2, LIU Jian1,*, CAI Zhihai1, HE Dongyu3, WANG Xiaolong4
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1 National Engineering Research Center for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China
2 School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
3 National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China
4 School of Mechanical Engineering, Anhui University of Technology, Huainan 232001, Anhui, China |
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Abstract A series of [(Fe0.6Co0.2Ni0.2)0.75-0.03xB0.2Si0.05+0.03x]96Nb4 amorphous alloy composite coatings were prepared by adjusting the silicon content (x=0, 1, 2, 3, 4, 5, and 6) and their microstructures and tribological properties were investigated by laser cladding technique. Additionally, the effect of Si on the glass forming ability (GFA) of the layers was understood. Results show that an appropriate Si content can refine the microstructure of the FeCoNiBSiNb laser cladding layers and improve the mechanical and tribological properties. The hardness of the coating layer increases monotonically with the Si content. At the Si content of 4.8at% (x=0), the coating layer exhibits a relatively low hardness (734.2HV0.1). Conversely, at the silicon content of 13.44at% (x=3), the coating layer exhibits the highest hardness (1 106HV0.1). The non-crystalline content and tensile strength exhibit an initial increase, followed by a subsequent decrease. At x=2, the coating exhibits its maximum fracture strength (2 880 MPa). However, when x＞2, the fracture strength of the coating decreases with an increase in x. Conversely, with an increase in Si content, the wear volume loss initially decreases and then increases. At a Si content of 10.56at% (x=2), the coating exhibits the highest non-crystalline content (42%), the highest tensile strength (2 880 MPa), and the most favorable dry friction performance.
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Published: 25 June 2025
Online: 2025-06-19
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