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Majid Zarezadeh Mehrizi

Majid Zarezadeh Mehrizi

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-6187-8592
Education: PhD.
ScopusId: 42862660300
HIndex:
Faculty: Engineering
Address: Arak University
Phone:

Research

Title
Synthesis of NiAl/TiC–Al2O3 composite by mechanically activated combustion synthesis
Type
JournalPaper
Keywords
NiAl/Al2O3–TiC compositeCombustion synthesisMechanical activationMechanism
Year
2020
Journal Ceramics International
DOI
Researchers Majid Zarezadeh Mehrizi ، Masoud Sedigh Mofrad

Abstract

The NiAl/Al2O3–TiC composite was fabricated by the combustion synthesis of NiO/Al/Ti/C powder starting mixture. The effects of mechanical activation on phase formation and microstructure development were evaluated by X-ray diffraction, scanning electron microscopy using energy dispersive spectroscopy, and transmission electron microscopy. By the combustion synthesis of an as-mixed powder compact, a partial amount of NiO was reduced by molten aluminum with the formation of NiAl3 and Al2O3. Mechanical activation refined the particle size of the reactants and after combustion synthesis, Ni was reduced by the reaction of NiO/Al with molten Al giving rise to NiAl. NiAl formation is an exothermic reaction whose released energy starts the ignition resulting in the final NiAl/Al2O3–TiC composite.