Abstract

The effect of the introduction of ultrafine particles of alumina, nickel oxides and a mixture of their oxides on the mechanical and tribological properties, structure and wear characteristics of powder tin bronze is studied. The increase in the content of alumina from 2 to 5 wt % leads to a decrease in strength by 1.2–1.4 times, and from 5 to 10 wt % it does not affect the change in the tensile strength of powder bronze and leads to a slight decrease in the compressive strength. With an increase in the alumina content from 2 to 10%, the coefficient of friction and the wear rate of powder bronze decrease, and the seizure pressure increases. The addition of nickel oxide to alumina promotes the formation of a homogeneous structure, lower porosity and smaller pore size, an increase in strength, a decrease in coefficient of friction of powder bronze from 0.028 to 0.022, by 2.5 times of wear rate, as well as an increase in seizure pressure from 4 to 7.0 MPa.

中文翻译：

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添加超细氧化物的锡青铜粉的摩擦学特性和磨损特性

摘要

研究了引入氧化铝，氧化镍及其氧化物混合物的超细颗粒对粉末锡青铜的机械和摩擦学性能，结构和磨损特性的影响。氧化铝含量从2 wt％增至5 wt％导致强度降低1.2-1.4倍，从5 wt％增至10 wt％不会影响粉末青铜的拉伸强度变化，并导致轻微的变化。压缩强度降低。随着氧化铝含量从2％增加到10％，粉末青铜的摩擦系数和磨损率降低，咬合压力增加。向氧化铝中添加氧化镍可促进形成均质结构，降低孔隙率和减小孔径，提高强度，