High temperature tribological properties of a nickel-alloy-based solid lubricating composite: Effect of surface tribo-chemistry, counterpart and mechanical properties
High temperature tribological properties of a nickel-alloy-based solid lubricating composite: Effect of surface tribo-chemistry, counterpart and mechanical properties
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镍合金基固体润滑复合材料的高温摩擦学性能：表面摩擦化学、对应物和机械性能的影响
DOI：
10.1016/j.wear.2017.06.001
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发表时间：
2017
期刊：
影响因子：
5
通讯作者：
Liu Weimin
中科院分区：
文献类型：
--
作者：
Cheng Jun;Li Fei;Zhu Shengyu;Hao Junying;Yang Jun;Li Wensheng;Liu Weimin
本文旨在描述新型 NiCrAlMo-12.5 wt 的特性。 % Ag-X 重量% CaF2/BaF2(X = 5 或 10) 固体润滑复合材料，从室温到 800 °C 同时具有高强度和自润滑性，因此将是航空航天轴承应用的潜在候选者。此外，澄清氟化物含量对该材料的摩擦学响应的影响是另一个目标。这些复合材料作为轴承材料的滑动摩擦和磨损性能是使用销轴旋转平盘配置与 Inconel718 合金销轴进行评估的。此外，还研究了复合材料的表面摩擦化学反应和机械性能，并将其与其摩擦学行为联系起来。降低氟化物共晶含量可显着提高复合材料在 600°C 以上的耐磨性，这在很大程度上取决于表面摩擦化学反应以及与对应物的相互作用，而不是机械性能。 Inconel718对应件在整个测试温度范围内的磨损率低至10-7mm3/(Nm)。
This paper is aimed to characterize the new NiCrAlMo-12.5 wt. % Ag- X wt. % CaF2/BaF2(X = 5 or 10) solid-lubricating composites, which have high strength and self-lubricity simultaneously from room temperature to 800 °C and thus would be a potential candidate for aerospace bearing applications. Additionally, clarification of the influence of fluoride content on the tribological responses of this material is another object. Sliding friction and wear performances of these composites as bearing materials are evaluated using a pin-on-rotating-flat disc configuration against an Inconel718 alloy pin. Also, the surface tribo-chemical reactions and mechanical properties of the composites are investigated and related to their tribological behaviors. Reducing the fluoride eutectic content leads to significant improvement on the wear resistance of the composites above 600 °C, which is strongly dependent on the surface tribo-chemical reactions and the interaction with the counterpart, not on the mechanical properties. The wear rate of the Inconel718 counterpart over the entire testing temperature range is as low as 10-7mm3/(Nm).