Preparation of Liquid Metal-based SiC/Graphene Binary Hybrid Nanofluid and Its Basic Properties as Hydraulic Transmission Medium

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-02-15 DOI:10.1007/s11249-024-01828-6

Jiajun Jiang, Xian Meng, Kunyang Mu, Qichen Zhu, Chengdu Geng, Changli Cai, Zhangyong Wu

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Abstract

Liquid metal (LM) with good room-temperature fluidity and high-temperature stability is an ideal base fluid for extreme high-temperature hydraulic transmission medium. However, the low viscosity and high density of LMs are not conducive to the sealing and lubrication performance of hydraulic components. Using Ga_68.5In_21.5Sn₁₀ as the base fluid and SiC nanoparticles and graphene with good self-lubricity as a dispersed phase through homogenization and grinding, the novel LM-based SiC/Graphene binary hybrid nanofluid were prepared. The basic physical properties, rheological properties and lubricity at 25–200 °C of LM-based SiC/Graphene binary hybrid nanofluid at 0% 5 vol. %, 10 vol. %, 20 vol. % and 30 vol. % of nanoadditives were also explored. Compared with existing high-temperature hydraulic medium, LM-based SiC/Graphene binary hybrid nanofluid has excellent thermal stability, excellent heat dissipation performance, smaller temperature-viscosity changes, and good high-temperature lubricating performance. We selected 20 vol. % of the samples with the most suitable rheological and lubricating properties for hydraulic transmission medium and evaluated the volumetric efficiency and wear of the gear pump by introducing the samples into a hydraulic system. The results show that compared to pure LM, 20 vol. % of the sample can improve the volumetric efficiency of the gear pump and demonstrate good anti-wear performance.

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液态金属基碳化硅/石墨烯二元混合纳米流体的制备及其作为液压传动介质的基本特性

液态金属（LM）具有良好的室温流动性和高温稳定性，是极端高温液压传动介质的理想基础油。然而，液态金属的低粘度和高密度不利于液压元件的密封和润滑性能。本研究以 Ga68.5In21.5Sn10 为基液，以 SiC 纳米颗粒和具有良好自润滑性的石墨烯为分散相，通过均化和研磨，制备了新型基于 LM 的 SiC 石墨烯二元混合纳米流体。研究还探讨了纳米添加剂含量分别为 0%、5%、10%、20% 和 30%时，基于 LM 的碳化硅/石墨烯二元杂化纳米流体在 25-200 ℃ 下的基本物理性质、流变性能和润滑性能。与现有的高温液压介质相比，基于 LM 的 SiC/石墨烯二元杂化纳米流体具有优异的热稳定性、出色的散热性能、较小的温度-粘度变化以及良好的高温润滑性能。我们选取了流变和润滑性能最适合作为液压传动介质的 20 Vol.结果表明，与纯 LM 相比，20 Vol.

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.