Open AccessSynthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates
Author(s) -
P. Elumalai,
R. Bairava Ganesh
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab6ca3
Subject(s) - microstructure , materials science , magnesium , composite number , titanium dioxide , powder metallurgy , nanocomposite , titanium , particle size , scanning electron microscope , extrusion , metallurgy , particle (ecology) , chemical engineering , composite material , oceanography , engineering , geology
In the present work, magnesium matrix composite reinforced with titanium dioxide (TiO 2 ) nanoparticulates was synthesized using powder metallurgy (solid-state processing) technique followed by hybrid microwave heat treatment and hot extrusion. Commercially available magnesium particulates of average particle size 60–300 μ m and titanium oxide nanoparticulates of average particle size ∼21 nm was used in this study. Extruded samples of pure magnesium and magnesium titanium dioxide (Mg-TiO 2 ) nanocomposites were characterized for their physical, surface and internal microstructure (2D & 3D), elemental composition and mechanical behaviour. The experimental density and porosity of the composite specimens increases gradually with increase in addition of TiO 2 . Scanning electron micrographs (SEM) composite samples revealed that the nano TiO 2 particulates distributed uniformly throughout the matrix with no significant agglomeration. The same was confirmed through 3D internal microstructure also. The elemental composition, crystalline structure was measured using x-ray diffractograms (XRD) which confirm that no foreign elements exists. Further, the microhardness and nanoindentation of composite samples showed an increasing trend with increase in addition of TiO 2 nanoparticles.