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Reza Beygi

Reza Beygi

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-0110-1642
Education: PhD.
ScopusId: 36337544600
Faculty: Engineering
Address: Arak University
Phone: 086-32625824

Research

Title
Mechanical activation-assistedcombustionsynthesisofinsitu aluminum matrixhybrid(TiC/Al2O3)nanocomposite
Type
JournalPaper
Keywords
Aluminum matrixnanocomposites Mechanically activation Combustion synthesis
Year
2016
Journal Ceramics International
DOI
Researchers Hossein Mostaan ، Majid Zarezadeh Mehrizi ، Reza Beygi ، Mehdi Raoufi ، Aboulfazl Barati

Abstract

The aimofthisstudyisthesynthesisofaluminum-basedmetalmatrixnanocompositesreinforcedwith in situTiCandAl2O3 hybridreinforcementsbythemechanicallyactivatedcombustionsynthesis.The composites werefabricatedfromthepowderblendsconsistingofaluminum,rutileandgraphitewithan excessamountofaluminumfollowingthe14Al–3TiO23C systemandmilledupto30h.Phaseevolu- tions andstructuralchangesduringballmillingandcombustionsynthesiswerestudiedbyX-raydif- fraction technique, field-emission gunscanningelectronmicroscopyandtransmissionelectronmicro- scopy.Theresultsshowedthatevenafter10hofmilling,nonewphaseswereformed.Theincreasingof milling timecausedthebroadeningofallthepeaksindicatingadecreaseinthecrystallitesizeandan increase inthelatticestrain.TheseresultsshowedthatAl,CandTiO2 nanocrystallitescouldbeobtained during theball-millingprocess.Theresultofcombustionsynthesisofun-milledpowdersconfirmed that no newphaseswerefound.Incomparisonwithun-milledpowdermixture,the10hmilledpowdercould be easilyignitedandXRD,HRSEMandTEMresultsconfirmed thatAl/TiC–Al2O3 nanocomposite was successfully synthesizedthroughcombustionmethodfromthemechanicalactivatedpowdermixture. Mechanical activationviahighenergyball-millingprovidedtotheinitialpowdermixtureextraenergy, which isneededtoincreasethereactivityofpowdermixtureandtomakepossibletheignitionandthe sustaining ofcombustion.