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Effect of metal coating of reinforcements on the microstructure and mechanical properties of Al-Al2O3 nanocomposites

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ABSTRACT The effects of various methods of reinforcement modification on the microstructure and mechanical properties of Al–Al2O3 nanocomposites were investigated. Alumina nanoparticles were modified by electroless deposition of Cu, Ni… Click to show full abstract

ABSTRACT The effects of various methods of reinforcement modification on the microstructure and mechanical properties of Al–Al2O3 nanocomposites were investigated. Alumina nanoparticles were modified by electroless deposition of Cu, Ni and Co. Subsequently, aluminium matrix nanocomposites reinforced with uncoated and coated nanoparticles were produced by the stir casting method. The results of microstructural analysis showed improved wettability of coated nanoparticles in the molten aluminium alloy. Furthermore, coated nanoparticles exhibited a more desirable interface with the matrix and were homogenously distributed within it. The mechanical properties of the nanocomposites were improving significantly when coated nanoparticles were used as reinforcements. Among the reinforcement modification methods, Ni-coating was recognised as being more effective for improving the mechanical properties of Al–Al2O3 nanocomposites.

Keywords: al2o3 nanocomposites; microstructure mechanical; properties al2o3; mechanical properties; effect metal; coated nanoparticles

Journal Title: Materials Science and Technology
Year Published: 2018

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