سال انتشار: ۱۳۹۱

محل انتشار: اولین کنفرانس بین المللی مواد پیشرفته

تعداد صفحات: ۵

نویسنده(ها):

Hesam Rezvani Sichani – M.Sc.Department of Materials Engineering, Isfahan University of Technology (IUT), Isfahan, Iran
Mehdi Salehi – Professor Department of Materials Engineering, Isfahan University of Technology (IUT), Isfahan, Iran
Hosein Edris – Professor Department of Materials Engineering, Isfahan University of Technology (IUT), Isfahan, Iran
Mansoor Toorani Farani – M.Sc.

چکیده:

Intermetallic compounds are advanced materials that have recently gained considerable importance due to their mechanical and physical properties. Considering their improved mechanical properties, formation of nanostructure intermetallic compounds has received special attention. Ni-Ti-Al intermetallic compounds have significant importance given their high strength, thermal resistance and corrosion resistance. Mechanical alloying followed by appropriate heat treatment to produce nanostructure intermetallic compounds is being widely used nowadays. This study aimed at investigating the effect of ball mill time and the heat treatment after it on the formation of nanostructure intermetallic compounds in Ni50-Ti25-Al25 system. To do so, the Ni50Ti25Al25 mixed powder was prepared and milled in a planetary ball mill at different times. Products were evaluated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Upon milling for 100 hour, Ni3Al nanostructure intermetallic compound was formed. The mixed powder was obtained after 100 hours milling was annealed. Results obtained after heat treatment suggest the formation of ternary system of intermetallic compounds such as Ni3(Ti,Al) and Ni2TiAl as well as binary compounds. Given the formation of Ni-Ti-Al nanostructure system with desirable properties and considering the simplicity and low cost of the process, mechanical alloying and heat treatment can also be used to produce other intermetallic compounds.