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Synthesis and Spark Plasma Sintering of Mg 2 Si Nanopowder by Mechanical Alloying and Heat Treatment
Author(s) -
Khajelakzay Mohammad,
Bakhshi Saeed Reza,
Borhani Gholam Hossein,
Ramazani Mazaher
Publication year - 2016
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12522
Subject(s) - materials science , spark plasma sintering , transmission electron microscopy , scanning electron microscope , sintering , magnesium , ceramic , metallurgy , silicide , combustion , analytical chemistry (journal) , nanoparticle , chemical engineering , nuclear chemistry , silicon , composite material , nanotechnology , chemistry , chromatography , engineering
In this investigation, a two‐step method for the preparation of magnesium silicide (Mg 2 Si) nanopowder was studied. This method is known as mechanical alloying followed by heat treatment. The results showed that the compositions of the combustion products depended on the milling time, heat treatment temperature, and starting mixtures. Pure Mg 2 Si nanopowder was formed after short milling time and heat treatment, from Mg and Si powders with the mole ratio of 2.1:1 (Mg:Si) at 500°C in Ar atmosphere. Using the Mg 2 Si nanopowder, Mg 2 Si ceramic was produced by spark plasma sintering at 800°C under 50 MP a for 15 min. Composition and structure of reactants and products were examined by X‐ray diffraction ( XRD ), field emission scanning electron microscopy ( FE ‐ SEM ) and high‐resolution transmission electron microscopy ( HR ‐ TEM ).