Title of article :
Synthesis and characterization of aluminium–alumina micro- and nano-composites by spark plasma sintering
Author/Authors :
Dash، نويسنده , , K. and Chaira، نويسنده , , D. and Ray، نويسنده , , B.C.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
8
From page :
2535
To page :
2542
Abstract :
In the present study, an emphasis has been laid on evaluation of the microstructural morphologies and their implications on mechanical performance of the composites by varying the reinforcement particle size. Nanocomposites of 0.5, 1, 3, 5, 7 volume % alumina (average size < 50 nm) and microcomposites of 1, 5, 20 volume % of alumina (average size ~ 10 μm) reinforced in aluminium matrix were fabricated by spark plasma sintering technique at a temperature of 773 K and pressure of 50 MPa. These micro- and nano-composites have been characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy followed by density, microhardness and nanoindentation hardness measurements. The alumina nanoparticles revealed appreciable physical intimacy with the aluminium matrix than that of alumina microparticles. The highest nanohardness recorded 0.85 GPa and 99% densification for 7 and 1 vol.% Al–Al2O3 nancomposites respectively. Spark plasma sintering imparts enhanced densification and matrix-reinforcement proximity which have been corroborated with the experimental results.
Keywords :
A. Composites , D. Microstructure , C. Electron microscopy
Journal title :
Materials Research Bulletin
Serial Year :
2013
Journal title :
Materials Research Bulletin
Record number :
2103753
Link To Document :
بازگشت