Abstract
Al based metal matrix nanocomposite (MMNC) is synthesized by dispersing nanocrystalline aluminium nitride (AlN) particles in Aluminum matrix using ex-situ melt metallurgy method. The entrapment of atmospheric oxygen along with ex-situ particulate has been a long standing issue during fabrication of metal matrix composites. In the present investigation, presence of oxygen has been quantified in synthesized Al-AlN MMNCs with varying AlN content. The high resolution scanning electron microscopy is used to study morphology and distribution of AlN in Al matrix. Energy dispersive spectroscopy analysis is used to quantify in situ oxide phases along with AlN particles in the synthesized MMNCs using thermodynamic mass balance calculations. Present study also attempts to understand the role of in-situ oxide phases on the mechanical properties of MMNCs using microindentation hardness and nanoindentation test.
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Acknowledgments
Authors are thankful to Mr. Karthiselva for nanoindentation experimentation at Indian Institute of Technology Madras, India.
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Fale, S., Likhite, A. & Bhatt, J. Study on Quantification of Oxide Phases in Ex-situ AlN/Al Metal Matrix Nanocomposites. Trans Indian Inst Met 67, 761–767 (2014). https://doi.org/10.1007/s12666-014-0400-0
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DOI: https://doi.org/10.1007/s12666-014-0400-0