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Binder assisted graphene derivatives as lubricants in copper: Improved tribological performance for industrial application
oleh: Changjie Huang, Su Zhao, Ruiqi Chen, Erik Johansson, Muhammad Aqeel, Uta Klement, Anna M. Andersson, Mamoun Taher, Vincenzo Palermo, Jinhua Sun
Format: | Article |
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Diterbitkan: | Elsevier 2024-04-01 |
Deskripsi
Summary: Originally derived from graphite, high-quality single-layer graphene is an excellent anti-wear and -friction additive in metal matrix. Here, the tribological performance of 3 different commercialized graphene derivatives (e.g., graphene oxide [GO], reduced graphene oxide [RGO], and graphene nanoplatelet [GNP]) as additives in a Cu matrix, were investigated from an industrial perspective. To increase the interaction of graphene derivatives with Cu particles, and addressing the aggregation problem of the graphene derivatives, different binders (polyvinyl alcohol [PVA] and cellulose nanocrystals [CNC]) were introduced into the system. Benefiting from such a strategy, a uniform distribution of the graphene derivatives in Cu matrix was achieved with graphene loading up to 5 wt %. After high-temperature sintering, the graphene is preserved and well distributed in the Cu matrix. It was found that the GNP-containing sample shows the most stable friction coefficient behavior. However, GO and RGO also improve the tribological performance of Cu under different circumstances.