Microstructure and Interfacial Bonding Evolution of Cold Spray Deposited Graphene-Reinforced Composite Feedstock on AZ80 Magnesium Substrate
Journal of Thermal Spray Technology(2022)
摘要
Due to the outstanding mechanical properties of graphene nanoplates (GNP), it has been considered an ideal reinforcing agent for the production of a metal-matrix composite (MMC). In this study, 1.0 wt.% graphene-reinforced Aluminum 6061 MMC particles have been synthesized using the high-energy mechanical alloying (HE-MA) method to be deployed as feedstock in cold spray additive manufacturing. The synthesized MMC particles were spray coated on AZ80 magnesium substrate. The coating microstructure, coating-substrate interface evolution, and particle-particle bonding mechanism were studied. The novel HE-MA composite particles deposited coating exhibits greater deformability, thanks to crystal-level grain refinement, thereby improving interface mechanical interlocking.
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关键词
AA6061 powder,AZ80 alloys,bonding mechanism,cold spray coating,graphene-reinforced MMC,interface microstructure
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