شماره ركورد كنفرانس :
3811
عنوان مقاله :
Production of Nano-crystalline Mg(Gd)2Ni-based Powder Using High Energy Ball Milling and Subsequent Heat Treatment Muhammad Mehdinia1, Seyed Farshid Kashani-Bozorg2, Amir Zali3 and Negar Mehraein4 School
پديدآورندگان :
Mehdinia Muhammad mohamad.mehdinia@ut.ac.ir School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran , Kashani-Bozorg Seyed Farshid fkashani@ut.ac.ir School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran , Zali Amir amir.zali.az@ut.ac.ir School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran , Mehraein Negar n.mehraein@ut.ac.ir School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran
كليدواژه :
Mg2Ni , Ball Milling , Nano , crystallites , Heat treatment , Gd
عنوان كنفرانس :
ششمين كنفرانس بين المللي مهندسي مواد و متالوژي و يازدهمين همايش ملي مشترك انجمن مهندسي متالوژي و مواد ايران و انجمن علمي ريخته گري ايران
چكيده فارسي :
In the present work, high-energy milling technique using a planetary ball mill and subsequent annealing have been employed for the production of nano-crystalline powders based on Mg2Ni intermetallic compound. X-ray diffraction and scanning electron microscopy were used for the characterization of the milled products. Formation of Mg2Ni-based nanocrystallites occurred after 40 and 50h of milling using the initial binary and ternary powder mixtures with stoichiometric compositions of Mg2Ni and Mg1.8Gd0.2Ni, respectively. The calculated average Mg2Ni crystallite size was ~8 nm at the ball to powder weight ratio of 20:1 after 60 h of milling and showed decreasing with increasing the milling time. Subsequent annealing of the milled product at a low milling time of 20 h resulted in the formation of the dominant Mg2Ni intermetallic compound.
