Properties of UHMWPE Composites Reinforced by SiO2-SiC Hybrid Materials

GUO Yonggang; PENG Jiangbo; WANG Yi

doi:10.16490/j.cnki.issn.1001-3660.2025.19.008

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Surface Technology ›› 2025, Vol. 54 ›› Issue (19) : 85-97. DOI: 10.16490/j.cnki.issn.1001-3660.2025.19.008

Friction, Wear and Lubrication

Properties of UHMWPE Composites Reinforced by SiO₂-SiC Hybrid Materials

GUO Yonggang, PENG Jiangbo, WANG Yi

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Abstract

The influence of SiO₂-SiC hybrid materials prepared by in-situ growth on the tribological properties of UHMWPE composites under different friction conditions is investigated in order to obtain composites with excellent tribological properties. Five kinds of UHMWPE/SiO₂-SiC composites with different contents are prepared by hot pressing. The infrared characteristic peaks and phase structures of SiO₂-SiC hybrid materials are analyzed by Fourier transform infrared spectrometer and X-ray diffraction instrument, and the hardness of the composites is measured by Shore D hardness tester. The melting temperature of the composites is measured by differential scanning calorimeter (DSC) at a scanning rate of 10 ℃/min in nitrogen atmosphere. The thermal stability of the composites is analyzed by thermogravimetric analyzer (TGA). The temperature is raised from room temperature to 800 ℃ in argon atmosphere, the heating rate is 20 ℃/min, and the flow rate of argon is 20 mL/min. The tensile stress-strain test is carried out on a universal tensile testing machine (DNS800) at a tensile rate of 5 mm/min at 25 ℃, the mechanical and thermal properties of the composites are studied in detail. In order to investigate the friction and wear properties of UHMWPE composites modified by SiO₂-SiC hybrid materials, the tribological properties of UHMWPE composites are investigated by MDW-02G high speed reciprocating friction and wear tester. The surface micro-morphology of the wear samples is photographed with the help of scanning electron microscope, the corresponding wear mechanism is analyzed. The addition of SiO₂-SiC hybrid material can reflect the crystallization behavior of UHMWPE matrix, improve the crystallinity of the composite, help to stabilize the internal structure of the material, and reduce the structural change of the material at high temperature, indicating that the SiO₂-SiC hybrid material filled modified UHMWPE composite has good thermal stability. The Shore hardness of the composites is improved, and the tensile properties of the composites increase at first and then decrease with the increase of filling content, and the introduction of hybrid SiO₂-SiC significantly improves the Shore hardness, strength, modulus, elongation at break and toughness of the composites, which is attributed to the better interfacial bonding and stress transfer efficiency of the hybrid fillers. The UHMWPE composites containing SiO₂-SiC hybrid particles not only improve the strength of the composites, but also have better load-bearing capacity of the transfer film. Under most working conditions, the content of SiO₂-SiC hybrid fillers has a great influence on the friction coefficient, and the friction coefficient of the composites decreases at first and then increases with the increase of filling content. The tribological properties of UHMWPE composites modified with 2% SiO₂-SiC hybrid materials are better than those of other content fillers under dry friction and water lubrication conditions. In conclusion, the tribological properties of the composites with 2% SiO₂-SiC hybrid materials are the best, which can be used as a reference for the design of new water-lubricated bearing composites with excellent low friction and wear resistance.

Key words

UHMWPE / SiC / growth in situ / hybrid material / friction condition / ribological properties

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GUO Yonggang, PENG Jiangbo, WANG Yi. Properties of UHMWPE Composites Reinforced by SiO₂-SiC Hybrid Materials[J]. Surface Technology. 2025, 54(19): 85-97 https://doi.org/10.16490/j.cnki.issn.1001-3660.2025.19.008

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Funding

National Natural Science Foundation of China (51775169); The Key Research and Development Project of Henan Province (241111222100); Zhengzhou Innovation and Entrepreneurship Team Project (2024)