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通过在TC11合金摩擦界面添加机械混合的多层石墨烯和Fe_2O_3纳米颗粒,研究其对TC11合金磨损行为的影响,并与未添加及只添加多层石墨烯或Fe_2O_3纳米颗粒时进行对比。利用XRD、SEM和EDS等微观分析手段对磨损表面的物相、形貌和成分进行检测分析,并探讨摩擦层的形成过程及纳米材料的作用。结果表明:添加多层石墨烯或Fe_2O_3纳米颗粒时形成的摩擦层不能稳定存在,无法改善TC11合金较差的耐磨性。而添加机械混合的多层石墨烯和Fe_2O_3纳米颗粒时,在磨面形成同时具有良好润滑性和优异承载能力的双层摩擦层,能有效地阻止金属间相互接触,对基体起到保护作用,使得TC11合金的磨损量显著下降。
The mechanical properties of TC11 alloy were studied by adding mechanically mixed multi-layers of graphene and Fe_2O_3 nanoparticles to the friction interface of TC11 alloy, and compared with those without or with multi-layers of graphene or Fe_2O_3 nanoparticles. The phase, morphology and composition of the worn surface were detected and analyzed by means of microscopic analysis such as XRD, SEM and EDS. The formation process of friction layer and the effect of nanomaterials were also discussed. The results show that the friction layer formed when multi-layer graphene or Fe_2O_3 nanoparticles are added can not be stably present, and the poor wear resistance of TC11 alloy can not be improved. The addition of mechanically mixed multi-layer graphene and Fe 2 O 3 nano-particles can effectively prevent the intermetallics from contacting each other and protect the substrate when forming the double-layer friction layer with good lubricity and excellent bearing capacity. TC11 alloy wear caused significant decline.