Tribological behaviour of Cu-Zn based self-lubricating components reinforced with rare earth oxide Y2O3
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摘要: 采用SPS放电等离子闪烧法，制备了含稀土氧化物Y2O3和润滑相石墨的Cu-Zn基自润滑复合材料，研究了稀土氧化物Y2O3和石墨的添加对铜基自润滑复合材料的力学性能和摩擦磨损性能的影响规律。结果表明：添加3wt%石墨的Cu-Zn合金摩擦系数比普通Cu-Zn合金降低63.6%；添加质量分数1wt%稀土氧化物Y2O3的复合材料综合性能呈现峰值效应，硬度提高41.5%，摩擦系数降低25%。稀土氧化物Y2O3在基体中产生弥散强化效应，细化晶粒及基体孔隙、提高复合材料致密度，形成具有优良摩擦学性能的连续润滑膜。
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关键词:
Abstract: Cu-Zn-based self-lubricating composites containing rare-earth oxide Y2O3 and lubricating phase graphite were prepared by discharge plasma flash burning method, and the effects of the addition of rare-earth oxide Y2O3 and graphite on the mechanical properties and friction and wear properties of Cu-based self-lubricating composites were investigated. The results show that the friction coefficient of Cu-Zn alloy with 3 wt% graphite added is 63.6% lower than that of ordinary Cu-Zn alloy; the comprehensive performance of the composite with the addition of 1 wt% of rare-earth oxide Y2O3 in mass fraction shows a peak effect, with the hardness increased by 41.5% and the coefficient of friction reduced by 25%. Rare earth oxide Y2O3 in the matrix to produce diffuse strengthening effect, refine the grain and matrix pores, improve the density of composite materials, the formation of a continuous lubrication film with excellent tribological properties.-
Key words:
- SPS /
- solid self-lubrication /
- rare earth elements /
- friction and wear properties
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