Abstract
Conventional aluminum (Al) and its alloys have been replaced by aluminum matrix composites (AMCs) due to their superior properties in the recent years. There are several attractive candidates as reinforcement for aluminum composites such as Al2O3, B4C and SiC. Nowadays, carbon based materials such as graphite, carbon nanotubes (CNTs) and graphene have attracted much attention owing to their above mentioned mechanical and physical properties. In this study, the wear behavior of Al graphene nanoplatelets (GNPs) composites reinforced with up to 2 wt.-% GNP were investigated. The addition of graphene up to 1 wt.-% decreased coefficient of friction. Experimental data were used to develop linear and nonlinear models. The experimental results are in good agreement with the results of the simulations based on the identified models.
Kurzfassung
Konventionelles Aluminium (Al) und seine Legierungen wurden in den letzten Jahren durch Aluminiummatrix-Komposite (AMC) aufgrund ihrer hervorragenden Eigenschaften ersetzt. Für die Verstärkung der Aluminium-Komposite existieren verschiedene attraktive Komponenten, wie beispielsweise Al2O3, B4C und SiC. Heute gewinnen kohlenstoffbasierte Materialien, wie beispielsweise Graphit, Carbon-Nanoröhrchen und Graphen eine hohe Beachtung wegen der oben erwähnten mechanischen und physikalischen Eigenschaften. In der diesem Beitrag zugrunde liegenden Studie wurde das Verschleißverhalten von Al-GNP Kompositen untersucht, die mit bis zu 2 wt.-% GNP verstärkt wurden. Die Zugabe von bis zu 1 wt.-% GNP verringerte den Reibkoeffizient. Die experimentellen Ergebnisse wurden verwendet, um lineare und nichtlineare Modelle zu entwickeln. Die experimentellen Ergebnisse sind in guter Übereinstimmung mit den Resultaten der Simulationen, die basierend auf den identifizierten Modellen durchgeführt wurden.
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